./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh --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 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 --- 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-2329fc7 [2022-12-14 11:29:15,823 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:29:15,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:29:15,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:29:15,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:29:15,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:29:15,846 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:29:15,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:29:15,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:29:15,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:29:15,850 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:29:15,852 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:29:15,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:29:15,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:29:15,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:29:15,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:29:15,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:29:15,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:29:15,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:29:15,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:29:15,861 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:29:15,862 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:29:15,863 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:29:15,864 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:29:15,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:29:15,896 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:29:15,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:29:15,897 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:29:15,898 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:29:15,899 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:29:15,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:29:15,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:29:15,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:29:15,901 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:29:15,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:29:15,902 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:29:15,903 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:29:15,903 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:29:15,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:29:15,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:29:15,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:29:15,906 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 11:29:15,934 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:29:15,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:29:15,935 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:29:15,935 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:29:15,936 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:29:15,936 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:29:15,936 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:29:15,936 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:29:15,937 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:29:15,937 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:29:15,937 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:29:15,937 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:29:15,937 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:29:15,938 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:29:15,938 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:29:15,938 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:29:15,938 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:29:15,938 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:29:15,939 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 11:29:15,939 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 11:29:15,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:29:15,940 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:29:15,940 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 11:29:15,940 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:29:15,940 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:29:15,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:29:15,941 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 11:29:15,941 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 11:29:15,941 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 11:29:15,941 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:29:15,941 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 11:29:15,941 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:29:15,942 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:29:15,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:29:15,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:29:15,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:29:15,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:29:15,943 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:29:15,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:29:15,943 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:29:15,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:29:15,943 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:29:15,943 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_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 [2022-12-14 11:29:16,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:29:16,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:29:16,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:29:16,138 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:29:16,138 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:29:16,139 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2022-12-14 11:29:18,825 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:29:18,996 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:29:18,997 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2022-12-14 11:29:19,002 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/data/487022fc6/43b285a90f6f4e20981ad662be08482c/FLAG2060e6a44 [2022-12-14 11:29:19,012 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/data/487022fc6/43b285a90f6f4e20981ad662be08482c [2022-12-14 11:29:19,014 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:29:19,015 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:29:19,017 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:29:19,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:29:19,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:29:19,020 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:29:19" (1/1) ... [2022-12-14 11:29:19,020 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d463b28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:29:19, skipping insertion in model container [2022-12-14 11:29:19,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:29:19" (1/1) ... [2022-12-14 11:29:19,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:29:19,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:29:19,155 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_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2434,2447] [2022-12-14 11:29:19,161 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:29:19,169 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) [2022-12-14 11:29:19,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@25def9c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:29:19, skipping insertion in model container [2022-12-14 11:29:19,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:29:19,170 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 11:29:19,171 INFO L158 Benchmark]: Toolchain (without parser) took 155.05ms. Allocated memory is still 130.0MB. Free memory was 95.9MB in the beginning and 86.3MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-14 11:29:19,171 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 130.0MB. Free memory was 96.3MB in the beginning and 96.2MB in the end (delta: 140.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 11:29:19,172 INFO L158 Benchmark]: CACSL2BoogieTranslator took 153.12ms. Allocated memory is still 130.0MB. Free memory was 95.9MB in the beginning and 86.3MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-14 11:29:19,173 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 130.0MB. Free memory was 96.3MB in the beginning and 96.2MB in the end (delta: 140.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 153.12ms. Allocated memory is still 130.0MB. Free memory was 95.9MB in the beginning and 86.3MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 101]: 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_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh --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 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 --- 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-2329fc7 [2022-12-14 11:29:20,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:29:20,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:29:20,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:29:20,571 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:29:20,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:29:20,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:29:20,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:29:20,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:29:20,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:29:20,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:29:20,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:29:20,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:29:20,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:29:20,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:29:20,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:29:20,586 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:29:20,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:29:20,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:29:20,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:29:20,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:29:20,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:29:20,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:29:20,596 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:29:20,600 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:29:20,600 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:29:20,601 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:29:20,602 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:29:20,602 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:29:20,603 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:29:20,604 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:29:20,604 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:29:20,605 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:29:20,605 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:29:20,606 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:29:20,607 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:29:20,607 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:29:20,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:29:20,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:29:20,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:29:20,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:29:20,610 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 11:29:20,633 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:29:20,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:29:20,634 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:29:20,634 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:29:20,634 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:29:20,634 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:29:20,635 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:29:20,635 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:29:20,635 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:29:20,635 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:29:20,635 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:29:20,635 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:29:20,636 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 11:29:20,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 11:29:20,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:29:20,636 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:29:20,636 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 11:29:20,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:29:20,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:29:20,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:29:20,637 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 11:29:20,637 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 11:29:20,637 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 11:29:20,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:29:20,637 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 11:29:20,637 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 11:29:20,637 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 11:29:20,637 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:29:20,638 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:29:20,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:29:20,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 11:29:20,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:29:20,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:29:20,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:29:20,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:29:20,638 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 11:29:20,639 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 11:29:20,639 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:29:20,639 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 11:29:20,639 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_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 362fd638a164593c63fbfc307f633b7ac4c475762218e6a2237e90d5b6553a84 [2022-12-14 11:29:20,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:29:20,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:29:20,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:29:20,860 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:29:20,860 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:29:20,861 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2022-12-14 11:29:23,382 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:29:23,559 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:29:23,559 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2022-12-14 11:29:23,565 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/data/52609f38c/b362e8c392914f31bc846b33e4d7ba8d/FLAGb9df18cb1 [2022-12-14 11:29:23,576 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/data/52609f38c/b362e8c392914f31bc846b33e4d7ba8d [2022-12-14 11:29:23,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:29:23,579 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:29:23,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:29:23,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:29:23,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:29:23,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:29:23" (1/1) ... [2022-12-14 11:29:23,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73205c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:29:23, skipping insertion in model container [2022-12-14 11:29:23,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:29:23" (1/1) ... [2022-12-14 11:29:23,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:29:23,610 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:29:23,768 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_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2434,2447] [2022-12-14 11:29:23,775 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:29:23,785 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 11:29:23,788 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:29:23,798 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_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2434,2447] [2022-12-14 11:29:23,801 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:29:23,805 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:29:23,822 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_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c[2434,2447] [2022-12-14 11:29:23,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:29:23,837 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:29:23,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:29:23 WrapperNode [2022-12-14 11:29:23,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:29:23,838 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:29:23,838 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:29:23,839 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:29:23,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:29:23" (1/1) ... [2022-12-14 11:29:23,852 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:29:23" (1/1) ... [2022-12-14 11:29:23,867 INFO L138 Inliner]: procedures = 26, calls = 37, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 102 [2022-12-14 11:29:23,867 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:29:23,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:29:23,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:29:23,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:29:23,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:29:23" (1/1) ... [2022-12-14 11:29:23,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:29:23" (1/1) ... [2022-12-14 11:29:23,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:29:23" (1/1) ... [2022-12-14 11:29:23,878 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:29:23" (1/1) ... [2022-12-14 11:29:23,885 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:29:23" (1/1) ... [2022-12-14 11:29:23,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:29:23" (1/1) ... [2022-12-14 11:29:23,889 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:29:23" (1/1) ... [2022-12-14 11:29:23,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:29:23" (1/1) ... [2022-12-14 11:29:23,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:29:23,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:29:23,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:29:23,893 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:29:23,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:29:23" (1/1) ... [2022-12-14 11:29:23,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:29:23,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:29:23,916 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:29:23,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:29:23,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:29:23,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 11:29:23,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 11:29:23,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 11:29:23,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 11:29:23,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 11:29:23,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 11:29:23,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 11:29:23,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 11:29:23,946 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 11:29:23,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 11:29:23,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:29:23,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:29:23,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 11:29:23,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 11:29:23,948 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 11:29:24,036 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:29:24,038 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:29:24,453 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:29:24,461 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:29:24,461 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 11:29:24,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:29:24 BoogieIcfgContainer [2022-12-14 11:29:24,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:29:24,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:29:24,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:29:24,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:29:24,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:29:23" (1/3) ... [2022-12-14 11:29:24,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26be3320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:29:24, skipping insertion in model container [2022-12-14 11:29:24,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:29:23" (2/3) ... [2022-12-14 11:29:24,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26be3320 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:29:24, skipping insertion in model container [2022-12-14 11:29:24,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:29:24" (3/3) ... [2022-12-14 11:29:24,472 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2022-12-14 11:29:24,490 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:29:24,491 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-12-14 11:29:24,491 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 11:29:24,580 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-14 11:29:24,613 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 11:29:24,624 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 206 places, 211 transitions, 446 flow [2022-12-14 11:29:24,626 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 206 places, 211 transitions, 446 flow [2022-12-14 11:29:24,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 211 transitions, 446 flow [2022-12-14 11:29:24,676 INFO L130 PetriNetUnfolder]: 15/208 cut-off events. [2022-12-14 11:29:24,677 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-14 11:29:24,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 208 events. 15/208 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 325 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 148. Up to 2 conditions per place. [2022-12-14 11:29:24,683 INFO L119 LiptonReduction]: Number of co-enabled transitions 5658 [2022-12-14 11:29:50,434 INFO L134 LiptonReduction]: Checked pairs total: 7978 [2022-12-14 11:29:50,434 INFO L136 LiptonReduction]: Total number of compositions: 230 [2022-12-14 11:29:50,440 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 63 places, 59 transitions, 142 flow [2022-12-14 11:29:50,513 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2342 states, 1842 states have (on average 4.796416938110749) internal successors, (8835), 2341 states have internal predecessors, (8835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:29:50,526 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:29:50,530 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;@71d3a9cc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:29:50,531 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2022-12-14 11:29:50,537 INFO L276 IsEmpty]: Start isEmpty. Operand has 2342 states, 1842 states have (on average 4.796416938110749) internal successors, (8835), 2341 states have internal predecessors, (8835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:29:50,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 11:29:50,541 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:29:50,541 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 11:29:50,542 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:29:50,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:29:50,545 INFO L85 PathProgramCache]: Analyzing trace with hash 26235, now seen corresponding path program 1 times [2022-12-14 11:29:50,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:29:50,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355117444] [2022-12-14 11:29:50,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:29:50,555 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 [2022-12-14 11:29:50,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:29:50,556 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:29:50,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:29:50,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:29:50,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:29:50,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:29:50,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:29:50,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:29:50,698 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:29:50,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355117444] [2022-12-14 11:29:50,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355117444] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:29:50,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:29:50,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:29:50,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208777805] [2022-12-14 11:29:50,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:29:50,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:29:50,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:29:50,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:29:50,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:29:50,737 INFO L87 Difference]: Start difference. First operand has 2342 states, 1842 states have (on average 4.796416938110749) internal successors, (8835), 2341 states have internal predecessors, (8835), 0 states have call successors, (0), 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) [2022-12-14 11:29:51,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:29:51,037 INFO L93 Difference]: Finished difference Result 1604 states and 6039 transitions. [2022-12-14 11:29:51,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:29:51,040 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 [2022-12-14 11:29:51,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:29:51,065 INFO L225 Difference]: With dead ends: 1604 [2022-12-14 11:29:51,065 INFO L226 Difference]: Without dead ends: 1604 [2022-12-14 11:29:51,065 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 [2022-12-14 11:29:51,068 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:29:51,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:29:51,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2022-12-14 11:29:51,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1602. [2022-12-14 11:29:51,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1326 states have (on average 4.5542986425339365) internal successors, (6039), 1601 states have internal predecessors, (6039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:29:51,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 6039 transitions. [2022-12-14 11:29:51,188 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 6039 transitions. Word has length 2 [2022-12-14 11:29:51,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:29:51,189 INFO L495 AbstractCegarLoop]: Abstraction has 1602 states and 6039 transitions. [2022-12-14 11:29:51,189 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) [2022-12-14 11:29:51,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 6039 transitions. [2022-12-14 11:29:51,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 11:29:51,189 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:29:51,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 11:29:51,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:29:51,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:29:51,392 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:29:51,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:29:51,394 INFO L85 PathProgramCache]: Analyzing trace with hash 26030, now seen corresponding path program 1 times [2022-12-14 11:29:51,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:29:51,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [384798827] [2022-12-14 11:29:51,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:29:51,396 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 [2022-12-14 11:29:51,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:29:51,399 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:29:51,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:29:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:29:51,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:29:51,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:29:51,660 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 11:29:51,661 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 [2022-12-14 11:29:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:29:51,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:29:51,682 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:29:51,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [384798827] [2022-12-14 11:29:51,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [384798827] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:29:51,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:29:51,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:29:51,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379097390] [2022-12-14 11:29:51,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:29:51,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:29:51,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:29:51,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:29:51,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:29:51,685 INFO L87 Difference]: Start difference. First operand 1602 states and 6039 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) [2022-12-14 11:29:51,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:29:51,869 INFO L93 Difference]: Finished difference Result 1601 states and 6037 transitions. [2022-12-14 11:29:51,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:29:51,870 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 [2022-12-14 11:29:51,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:29:51,886 INFO L225 Difference]: With dead ends: 1601 [2022-12-14 11:29:51,886 INFO L226 Difference]: Without dead ends: 1601 [2022-12-14 11:29:51,886 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 [2022-12-14 11:29:51,887 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:29:51,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 3 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:29:51,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2022-12-14 11:29:51,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1601. [2022-12-14 11:29:51,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1326 states have (on average 4.552790346907994) internal successors, (6037), 1600 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:29:51,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 6037 transitions. [2022-12-14 11:29:51,920 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 6037 transitions. Word has length 2 [2022-12-14 11:29:51,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:29:51,920 INFO L495 AbstractCegarLoop]: Abstraction has 1601 states and 6037 transitions. [2022-12-14 11:29:51,920 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) [2022-12-14 11:29:51,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 6037 transitions. [2022-12-14 11:29:51,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 11:29:51,921 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:29:51,921 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 11:29:51,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:29:52,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:29:52,126 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:29:52,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:29:52,127 INFO L85 PathProgramCache]: Analyzing trace with hash 26031, now seen corresponding path program 1 times [2022-12-14 11:29:52,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:29:52,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1882566504] [2022-12-14 11:29:52,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:29:52,128 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 [2022-12-14 11:29:52,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:29:52,129 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:29:52,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:29:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:29:52,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:29:52,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:29:52,290 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:29:52,290 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 [2022-12-14 11:29:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:29:52,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:29:52,312 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:29:52,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1882566504] [2022-12-14 11:29:52,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1882566504] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:29:52,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:29:52,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:29:52,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046481468] [2022-12-14 11:29:52,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:29:52,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:29:52,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:29:52,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:29:52,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:29:52,314 INFO L87 Difference]: Start difference. First operand 1601 states and 6037 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) [2022-12-14 11:29:52,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:29:52,563 INFO L93 Difference]: Finished difference Result 1601 states and 6036 transitions. [2022-12-14 11:29:52,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:29:52,563 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 [2022-12-14 11:29:52,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:29:52,570 INFO L225 Difference]: With dead ends: 1601 [2022-12-14 11:29:52,570 INFO L226 Difference]: Without dead ends: 1601 [2022-12-14 11:29:52,570 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 [2022-12-14 11:29:52,571 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:29:52,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:29:52,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1601 states. [2022-12-14 11:29:52,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1601 to 1601. [2022-12-14 11:29:52,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1326 states have (on average 4.552036199095022) internal successors, (6036), 1600 states have internal predecessors, (6036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:29:52,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 6036 transitions. [2022-12-14 11:29:52,619 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 6036 transitions. Word has length 2 [2022-12-14 11:29:52,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:29:52,620 INFO L495 AbstractCegarLoop]: Abstraction has 1601 states and 6036 transitions. [2022-12-14 11:29:52,620 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) [2022-12-14 11:29:52,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 6036 transitions. [2022-12-14 11:29:52,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 11:29:52,620 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:29:52,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 11:29:52,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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)] Ended with exit code 0 [2022-12-14 11:29:52,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:29:52,821 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:29:52,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:29:52,821 INFO L85 PathProgramCache]: Analyzing trace with hash 812178, now seen corresponding path program 1 times [2022-12-14 11:29:52,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:29:52,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228822870] [2022-12-14 11:29:52,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:29:52,822 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 [2022-12-14 11:29:52,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:29:52,823 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:29:52,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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)] Waiting until timeout for monitored process [2022-12-14 11:29:52,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:29:52,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:29:52,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:29:52,967 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-12-14 11:29:52,967 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 47 [2022-12-14 11:29:53,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:29:53,041 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:29:53,041 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:29:53,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228822870] [2022-12-14 11:29:53,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228822870] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:29:53,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:29:53,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:29:53,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341490443] [2022-12-14 11:29:53,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:29:53,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:29:53,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:29:53,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:29:53,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:29:53,043 INFO L87 Difference]: Start difference. First operand 1601 states and 6036 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:29:53,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:29:53,279 INFO L93 Difference]: Finished difference Result 1306 states and 4775 transitions. [2022-12-14 11:29:53,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:29:53,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 11:29:53,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:29:53,284 INFO L225 Difference]: With dead ends: 1306 [2022-12-14 11:29:53,285 INFO L226 Difference]: Without dead ends: 1306 [2022-12-14 11:29:53,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:29:53,285 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:29:53,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 3 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:29:53,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2022-12-14 11:29:53,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1306. [2022-12-14 11:29:53,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1096 states have (on average 4.356751824817518) internal successors, (4775), 1305 states have internal predecessors, (4775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:29:53,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 4775 transitions. [2022-12-14 11:29:53,323 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 4775 transitions. Word has length 3 [2022-12-14 11:29:53,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:29:53,324 INFO L495 AbstractCegarLoop]: Abstraction has 1306 states and 4775 transitions. [2022-12-14 11:29:53,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:29:53,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 4775 transitions. [2022-12-14 11:29:53,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 11:29:53,324 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:29:53,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 11:29:53,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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)] Ended with exit code 0 [2022-12-14 11:29:53,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:29:53,526 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:29:53,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:29:53,527 INFO L85 PathProgramCache]: Analyzing trace with hash 812180, now seen corresponding path program 1 times [2022-12-14 11:29:53,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:29:53,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [980151575] [2022-12-14 11:29:53,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:29:53,528 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 [2022-12-14 11:29:53,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:29:53,530 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:29:53,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (6)] Waiting until timeout for monitored process [2022-12-14 11:29:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:29:53,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:29:53,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:29:53,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:53,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:53,741 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-12-14 11:29:53,741 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 [2022-12-14 11:29:53,761 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-12-14 11:29:53,761 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 [2022-12-14 11:29:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:29:54,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:29:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:29:54,164 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:29:54,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [980151575] [2022-12-14 11:29:54,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [980151575] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:29:54,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1660236570] [2022-12-14 11:29:54,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:29:54,165 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:29:54,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:29:54,166 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:29:54,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-12-14 11:29:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:29:54,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:29:54,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:29:54,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:54,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:54,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:54,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:54,355 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 11:29:54,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-12-14 11:29:54,381 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 11:29:54,382 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 23 treesize of output 19 [2022-12-14 11:29:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:29:54,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:29:54,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1660236570] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:29:54,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:29:54,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [2, 2] total 5 [2022-12-14 11:29:54,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416445093] [2022-12-14 11:29:54,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:29:54,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:29:54,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:29:54,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:29:54,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:29:54,436 INFO L87 Difference]: Start difference. First operand 1306 states and 4775 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:29:54,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:29:54,617 INFO L93 Difference]: Finished difference Result 1011 states and 3514 transitions. [2022-12-14 11:29:54,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:29:54,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 11:29:54,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:29:54,621 INFO L225 Difference]: With dead ends: 1011 [2022-12-14 11:29:54,622 INFO L226 Difference]: Without dead ends: 1011 [2022-12-14 11:29:54,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:29:54,622 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:29:54,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 3 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:29:54,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2022-12-14 11:29:54,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 1011. [2022-12-14 11:29:54,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 866 states have (on average 4.0577367205542725) internal successors, (3514), 1010 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:29:54,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 3514 transitions. [2022-12-14 11:29:54,641 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 3514 transitions. Word has length 3 [2022-12-14 11:29:54,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:29:54,641 INFO L495 AbstractCegarLoop]: Abstraction has 1011 states and 3514 transitions. [2022-12-14 11:29:54,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:29:54,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 3514 transitions. [2022-12-14 11:29:54,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 11:29:54,641 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:29:54,641 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 11:29:54,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (6)] Ended with exit code 0 [2022-12-14 11:29:54,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2022-12-14 11:29:55,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:29:55,043 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:29:55,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:29:55,045 INFO L85 PathProgramCache]: Analyzing trace with hash 811974, now seen corresponding path program 1 times [2022-12-14 11:29:55,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:29:55,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1721616514] [2022-12-14 11:29:55,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:29:55,046 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 [2022-12-14 11:29:55,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:29:55,049 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:29:55,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (8)] Waiting until timeout for monitored process [2022-12-14 11:29:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:29:55,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:29:55,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:29:55,183 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:29:55,184 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 [2022-12-14 11:29:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:29:55,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:29:55,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:29:55,372 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:29:55,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1721616514] [2022-12-14 11:29:55,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1721616514] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:29:55,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [486949127] [2022-12-14 11:29:55,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:29:55,373 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:29:55,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:29:55,374 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:29:55,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-12-14 11:29:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:29:55,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:29:55,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:29:55,557 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:29:55,558 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 [2022-12-14 11:29:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:29:55,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:29:55,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:29:55,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [486949127] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:29:55,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793638943] [2022-12-14 11:29:55,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:29:55,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:29:55,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:29:55,644 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:29:55,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 11:29:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:29:55,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:29:55,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:29:55,784 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:29:55,785 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 [2022-12-14 11:29:55,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:29:55,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:29:55,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:29:55,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793638943] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:29:55,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:29:55,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 11:29:55,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243266112] [2022-12-14 11:29:55,949 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:29:55,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:29:55,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:29:55,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:29:55,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:29:55,950 INFO L87 Difference]: Start difference. First operand 1011 states and 3514 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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) [2022-12-14 11:29:57,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:29:57,515 INFO L93 Difference]: Finished difference Result 3028 states and 10538 transitions. [2022-12-14 11:29:57,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:29:57,517 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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 3 [2022-12-14 11:29:57,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:29:57,527 INFO L225 Difference]: With dead ends: 3028 [2022-12-14 11:29:57,528 INFO L226 Difference]: Without dead ends: 3028 [2022-12-14 11:29:57,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 11:29:57,528 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 257 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:29:57,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 15 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 11:29:57,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2022-12-14 11:29:57,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 1014. [2022-12-14 11:29:57,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 869 states have (on average 4.050632911392405) internal successors, (3520), 1013 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:29:57,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 3520 transitions. [2022-12-14 11:29:57,558 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 3520 transitions. Word has length 3 [2022-12-14 11:29:57,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:29:57,558 INFO L495 AbstractCegarLoop]: Abstraction has 1014 states and 3520 transitions. [2022-12-14 11:29:57,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 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) [2022-12-14 11:29:57,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 3520 transitions. [2022-12-14 11:29:57,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 11:29:57,559 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:29:57,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 11:29:57,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 11:29:57,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (8)] Forceful destruction successful, exit code 0 [2022-12-14 11:29:57,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-12-14 11:29:58,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:29:58,162 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:29:58,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:29:58,164 INFO L85 PathProgramCache]: Analyzing trace with hash 780521878, now seen corresponding path program 1 times [2022-12-14 11:29:58,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:29:58,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602591519] [2022-12-14 11:29:58,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:29:58,165 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 [2022-12-14 11:29:58,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:29:58,168 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:29:58,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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)] Waiting until timeout for monitored process [2022-12-14 11:29:58,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:29:58,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:29:58,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:29:58,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:58,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:58,350 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-12-14 11:29:58,350 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 [2022-12-14 11:29:58,361 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 [2022-12-14 11:29:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:29:58,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:29:58,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:29:58,703 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:29:58,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602591519] [2022-12-14 11:29:58,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602591519] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:29:58,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [49075955] [2022-12-14 11:29:58,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:29:58,703 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:29:58,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:29:58,704 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:29:58,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-12-14 11:29:58,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:29:58,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:29:58,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:29:58,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:58,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:29:58,903 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-12-14 11:29:58,903 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 2 case distinctions, treesize of input 15 treesize of output 35 [2022-12-14 11:29:58,916 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 26 treesize of output 24 [2022-12-14 11:29:58,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:29:58,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:29:58,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [49075955] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:29:58,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:29:58,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-12-14 11:29:58,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763695513] [2022-12-14 11:29:58,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:29:58,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:29:58,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:29:58,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:29:58,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:29:58,995 INFO L87 Difference]: Start difference. First operand 1014 states and 3520 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:29:59,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:29:59,152 INFO L93 Difference]: Finished difference Result 965 states and 3373 transitions. [2022-12-14 11:29:59,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:29:59,153 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 11:29:59,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:29:59,157 INFO L225 Difference]: With dead ends: 965 [2022-12-14 11:29:59,157 INFO L226 Difference]: Without dead ends: 965 [2022-12-14 11:29:59,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:29:59,158 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:29:59,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 3 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:29:59,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2022-12-14 11:29:59,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 965. [2022-12-14 11:29:59,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 840 states have (on average 4.015476190476191) internal successors, (3373), 964 states have internal predecessors, (3373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:29:59,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 3373 transitions. [2022-12-14 11:29:59,176 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 3373 transitions. Word has length 5 [2022-12-14 11:29:59,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:29:59,177 INFO L495 AbstractCegarLoop]: Abstraction has 965 states and 3373 transitions. [2022-12-14 11:29:59,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:29:59,177 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 3373 transitions. [2022-12-14 11:29:59,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 11:29:59,177 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:29:59,177 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 11:29:59,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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)] Ended with exit code 0 [2022-12-14 11:29:59,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2022-12-14 11:29:59,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:29:59,581 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:29:59,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:29:59,583 INFO L85 PathProgramCache]: Analyzing trace with hash 780521879, now seen corresponding path program 1 times [2022-12-14 11:29:59,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:29:59,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748331737] [2022-12-14 11:29:59,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:29:59,584 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 [2022-12-14 11:29:59,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:29:59,585 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:29:59,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:29:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:29:59,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:29:59,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:29:59,709 INFO L321 Elim1Store]: treesize reduction 101, result has 20.5 percent of original size [2022-12-14 11:29:59,710 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 44 [2022-12-14 11:29:59,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:29:59,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:29:59,732 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:29:59,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748331737] [2022-12-14 11:29:59,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748331737] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:29:59,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:29:59,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:29:59,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641380576] [2022-12-14 11:29:59,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:29:59,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:29:59,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:29:59,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:29:59,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:29:59,733 INFO L87 Difference]: Start difference. First operand 965 states and 3373 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:29:59,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:29:59,874 INFO L93 Difference]: Finished difference Result 916 states and 3226 transitions. [2022-12-14 11:29:59,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:29:59,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 11:29:59,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:29:59,877 INFO L225 Difference]: With dead ends: 916 [2022-12-14 11:29:59,877 INFO L226 Difference]: Without dead ends: 916 [2022-12-14 11:29:59,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:29:59,878 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:29:59,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:29:59,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-12-14 11:29:59,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 916. [2022-12-14 11:29:59,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 811 states have (on average 3.9778051787916153) internal successors, (3226), 915 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:29:59,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3226 transitions. [2022-12-14 11:29:59,896 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3226 transitions. Word has length 5 [2022-12-14 11:29:59,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:29:59,896 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 3226 transitions. [2022-12-14 11:29:59,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:29:59,897 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3226 transitions. [2022-12-14 11:29:59,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 11:29:59,897 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:29:59,897 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 11:29:59,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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)] Ended with exit code 0 [2022-12-14 11:30:00,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:30:00,098 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:30:00,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:00,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1573632089, now seen corresponding path program 1 times [2022-12-14 11:30:00,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:30:00,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [367967210] [2022-12-14 11:30:00,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:00,100 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 [2022-12-14 11:30:00,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:30:00,102 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:30:00,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:30:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:00,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:30:00,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:00,236 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 11:30:00,237 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 [2022-12-14 11:30:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:30:00,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:30:00,250 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:30:00,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [367967210] [2022-12-14 11:30:00,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [367967210] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:30:00,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:30:00,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:30:00,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601255391] [2022-12-14 11:30:00,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:30:00,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:30:00,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:30:00,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:30:00,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:30:00,251 INFO L87 Difference]: Start difference. First operand 916 states and 3226 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:30:00,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:00,419 INFO L93 Difference]: Finished difference Result 606 states and 2130 transitions. [2022-12-14 11:30:00,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:30:00,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 [2022-12-14 11:30:00,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:00,422 INFO L225 Difference]: With dead ends: 606 [2022-12-14 11:30:00,423 INFO L226 Difference]: Without dead ends: 606 [2022-12-14 11:30:00,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:30:00,423 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 70 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:00,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 3 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:30:00,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-12-14 11:30:00,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 606. [2022-12-14 11:30:00,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 554 states have (on average 3.844765342960289) internal successors, (2130), 605 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:30:00,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 2130 transitions. [2022-12-14 11:30:00,435 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 2130 transitions. Word has length 6 [2022-12-14 11:30:00,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:00,435 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 2130 transitions. [2022-12-14 11:30:00,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:30:00,435 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 2130 transitions. [2022-12-14 11:30:00,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 11:30:00,435 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:00,435 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 11:30:00,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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)] Ended with exit code 0 [2022-12-14 11:30:00,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:30:00,637 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:30:00,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:00,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1573632087, now seen corresponding path program 1 times [2022-12-14 11:30:00,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:30:00,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1558851483] [2022-12-14 11:30:00,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:00,638 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 [2022-12-14 11:30:00,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:30:00,639 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:30:00,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:30:00,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:00,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:30:00,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:00,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:00,959 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 25 treesize of output 21 [2022-12-14 11:30:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:01,017 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:30:01,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1558851483] [2022-12-14 11:30:01,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1558851483] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:01,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [600587392] [2022-12-14 11:30:01,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:01,017 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:30:01,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:30:01,018 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:30:01,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-12-14 11:30:01,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:01,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:30:01,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:01,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:01,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [600587392] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:01,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638525845] [2022-12-14 11:30:01,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:01,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:01,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:30:01,458 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:30:01,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 11:30:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:01,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 11:30:01,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:01,620 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:30:01,620 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 [2022-12-14 11:30:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:01,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:02,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638525845] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:02,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:30:02,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 22 [2022-12-14 11:30:02,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241049039] [2022-12-14 11:30:02,104 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:30:02,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 11:30:02,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:30:02,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 11:30:02,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-12-14 11:30:02,105 INFO L87 Difference]: Start difference. First operand 606 states and 2130 transitions. Second operand has 24 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:30:06,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:06,727 INFO L93 Difference]: Finished difference Result 2906 states and 10340 transitions. [2022-12-14 11:30:06,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 11:30:06,728 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 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 [2022-12-14 11:30:06,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:06,737 INFO L225 Difference]: With dead ends: 2906 [2022-12-14 11:30:06,737 INFO L226 Difference]: Without dead ends: 2906 [2022-12-14 11:30:06,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=359, Invalid=1363, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 11:30:06,738 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1434 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1434 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:06,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1434 Valid, 83 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-14 11:30:06,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2906 states. [2022-12-14 11:30:06,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2906 to 865. [2022-12-14 11:30:06,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 813 states have (on average 4.045510455104551) internal successors, (3289), 864 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:30:06,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 3289 transitions. [2022-12-14 11:30:06,766 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 3289 transitions. Word has length 6 [2022-12-14 11:30:06,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:06,766 INFO L495 AbstractCegarLoop]: Abstraction has 865 states and 3289 transitions. [2022-12-14 11:30:06,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:30:06,766 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 3289 transitions. [2022-12-14 11:30:06,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 11:30:06,766 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:06,766 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 11:30:06,775 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:30:06,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-12-14 11:30:07,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 11:30:07,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:07,369 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:30:07,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:07,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1575308433, now seen corresponding path program 2 times [2022-12-14 11:30:07,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:30:07,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396875091] [2022-12-14 11:30:07,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:30:07,372 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 [2022-12-14 11:30:07,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:30:07,373 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:30:07,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:30:07,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:30:07,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:30:07,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:30:07,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:07,596 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:30:07,597 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 [2022-12-14 11:30:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:07,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:08,380 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:30:08,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396875091] [2022-12-14 11:30:08,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1396875091] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:08,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [445860744] [2022-12-14 11:30:08,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:30:08,381 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:30:08,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:30:08,382 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:30:08,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-12-14 11:30:08,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:30:08,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:30:08,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:30:08,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:08,608 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:30:08,608 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 [2022-12-14 11:30:08,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:08,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:08,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:08,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [445860744] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:08,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027213259] [2022-12-14 11:30:08,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:30:08,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:08,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:30:08,794 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:30:08,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 11:30:08,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:30:08,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:30:08,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:30:08,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:08,956 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:30:08,957 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 [2022-12-14 11:30:09,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:09,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:09,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027213259] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:09,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:30:09,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2022-12-14 11:30:09,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121484445] [2022-12-14 11:30:09,129 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:30:09,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 11:30:09,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:30:09,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 11:30:09,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:30:09,130 INFO L87 Difference]: Start difference. First operand 865 states and 3289 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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) [2022-12-14 11:30:13,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:13,227 INFO L93 Difference]: Finished difference Result 5834 states and 22486 transitions. [2022-12-14 11:30:13,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 11:30:13,228 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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 6 [2022-12-14 11:30:13,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:13,246 INFO L225 Difference]: With dead ends: 5834 [2022-12-14 11:30:13,246 INFO L226 Difference]: Without dead ends: 5834 [2022-12-14 11:30:13,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-12-14 11:30:13,247 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 854 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:13,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [854 Valid, 72 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-12-14 11:30:13,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5834 states. [2022-12-14 11:30:13,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5834 to 871. [2022-12-14 11:30:13,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 819 states have (on average 4.03052503052503) internal successors, (3301), 870 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:30:13,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 3301 transitions. [2022-12-14 11:30:13,293 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 3301 transitions. Word has length 6 [2022-12-14 11:30:13,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:13,293 INFO L495 AbstractCegarLoop]: Abstraction has 871 states and 3301 transitions. [2022-12-14 11:30:13,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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) [2022-12-14 11:30:13,293 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 3301 transitions. [2022-12-14 11:30:13,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 11:30:13,293 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:13,293 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:30:13,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2022-12-14 11:30:13,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 11:30:13,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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)] Ended with exit code 0 [2022-12-14 11:30:13,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:30:13,895 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:30:13,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:13,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1537732111, now seen corresponding path program 1 times [2022-12-14 11:30:13,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:30:13,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806737828] [2022-12-14 11:30:13,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:13,898 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 [2022-12-14 11:30:13,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:30:13,901 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:30:13,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:30:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:14,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:30:14,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:14,093 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-12-14 11:30:14,093 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 29 [2022-12-14 11:30:14,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:30:14,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:30:14,115 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:30:14,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [806737828] [2022-12-14 11:30:14,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [806737828] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:30:14,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:30:14,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:30:14,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637197185] [2022-12-14 11:30:14,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:30:14,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:30:14,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:30:14,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:30:14,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:30:14,116 INFO L87 Difference]: Start difference. First operand 871 states and 3301 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-12-14 11:30:14,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:14,239 INFO L93 Difference]: Finished difference Result 812 states and 3096 transitions. [2022-12-14 11:30:14,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:30:14,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 [2022-12-14 11:30:14,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:14,242 INFO L225 Difference]: With dead ends: 812 [2022-12-14 11:30:14,242 INFO L226 Difference]: Without dead ends: 812 [2022-12-14 11:30:14,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:30:14,243 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:14,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 3 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:30:14,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-12-14 11:30:14,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2022-12-14 11:30:14,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 772 states have (on average 4.010362694300518) internal successors, (3096), 811 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:30:14,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 3096 transitions. [2022-12-14 11:30:14,261 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 3096 transitions. Word has length 7 [2022-12-14 11:30:14,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:14,262 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 3096 transitions. [2022-12-14 11:30:14,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-12-14 11:30:14,262 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 3096 transitions. [2022-12-14 11:30:14,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 11:30:14,262 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:14,262 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:30:14,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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)] Ended with exit code 0 [2022-12-14 11:30:14,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:30:14,463 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:30:14,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:14,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1537732109, now seen corresponding path program 1 times [2022-12-14 11:30:14,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:30:14,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935972605] [2022-12-14 11:30:14,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:14,463 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 [2022-12-14 11:30:14,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:30:14,464 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:30:14,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (22)] Waiting until timeout for monitored process [2022-12-14 11:30:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:14,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:30:14,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:14,667 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:30:14,667 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 [2022-12-14 11:30:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:14,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:15,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:15,047 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:30:15,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935972605] [2022-12-14 11:30:15,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935972605] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:15,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [956411038] [2022-12-14 11:30:15,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:15,047 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:30:15,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:30:15,048 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:30:15,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-12-14 11:30:15,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:15,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 11:30:15,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:15,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:30:15,271 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-14 11:30:15,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-12-14 11:30:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:30:15,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:30:15,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [956411038] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:30:15,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:30:15,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-12-14 11:30:15,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306922763] [2022-12-14 11:30:15,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:30:15,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:30:15,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:30:15,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:30:15,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:30:15,346 INFO L87 Difference]: Start difference. First operand 812 states and 3096 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-12-14 11:30:15,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:15,486 INFO L93 Difference]: Finished difference Result 753 states and 2891 transitions. [2022-12-14 11:30:15,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:30:15,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 [2022-12-14 11:30:15,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:15,492 INFO L225 Difference]: With dead ends: 753 [2022-12-14 11:30:15,492 INFO L226 Difference]: Without dead ends: 753 [2022-12-14 11:30:15,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:30:15,493 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:15,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 3 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:30:15,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-12-14 11:30:15,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 753. [2022-12-14 11:30:15,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 725 states have (on average 3.9875862068965517) internal successors, (2891), 752 states have internal predecessors, (2891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:30:15,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 2891 transitions. [2022-12-14 11:30:15,507 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 2891 transitions. Word has length 7 [2022-12-14 11:30:15,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:15,507 INFO L495 AbstractCegarLoop]: Abstraction has 753 states and 2891 transitions. [2022-12-14 11:30:15,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2022-12-14 11:30:15,507 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 2891 transitions. [2022-12-14 11:30:15,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 11:30:15,507 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:15,508 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-12-14 11:30:15,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (22)] Ended with exit code 0 [2022-12-14 11:30:15,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2022-12-14 11:30:15,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:30:15,909 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:30:15,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:15,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1588239752, now seen corresponding path program 1 times [2022-12-14 11:30:15,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:30:15,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148905618] [2022-12-14 11:30:15,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:15,912 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 [2022-12-14 11:30:15,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:30:15,915 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:30:15,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:30:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:16,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:30:16,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:16,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:16,233 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 [2022-12-14 11:30:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:16,364 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:30:16,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148905618] [2022-12-14 11:30:16,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148905618] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:16,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1640682529] [2022-12-14 11:30:16,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:16,364 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:30:16,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:30:16,365 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:30:16,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-12-14 11:30:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:16,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 11:30:16,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:16,620 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:30:16,621 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 [2022-12-14 11:30:16,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:16,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:17,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:17,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1640682529] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:17,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110854271] [2022-12-14 11:30:17,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:17,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:17,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:30:17,267 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:30:17,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 11:30:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:17,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:30:17,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:17,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:17,402 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 [2022-12-14 11:30:17,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:17,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110854271] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:17,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:30:17,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 18 [2022-12-14 11:30:17,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000059485] [2022-12-14 11:30:17,421 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:30:17,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 11:30:17,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:30:17,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 11:30:17,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-12-14 11:30:17,421 INFO L87 Difference]: Start difference. First operand 753 states and 2891 transitions. Second operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:30:19,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:19,598 INFO L93 Difference]: Finished difference Result 3848 states and 14608 transitions. [2022-12-14 11:30:19,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 11:30:19,599 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 11:30:19,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:19,607 INFO L225 Difference]: With dead ends: 3848 [2022-12-14 11:30:19,608 INFO L226 Difference]: Without dead ends: 3848 [2022-12-14 11:30:19,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2022-12-14 11:30:19,608 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1023 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:19,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 57 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 11:30:19,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3848 states. [2022-12-14 11:30:19,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3848 to 827. [2022-12-14 11:30:19,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 799 states have (on average 4.131414267834794) internal successors, (3301), 826 states have internal predecessors, (3301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:30:19,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 3301 transitions. [2022-12-14 11:30:19,639 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 3301 transitions. Word has length 7 [2022-12-14 11:30:19,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:19,639 INFO L495 AbstractCegarLoop]: Abstraction has 827 states and 3301 transitions. [2022-12-14 11:30:19,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:30:19,639 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 3301 transitions. [2022-12-14 11:30:19,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 11:30:19,640 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:19,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:30:19,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 11:30:19,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:30:20,047 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-12-14 11:30:20,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:30:20,242 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:30:20,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:20,243 INFO L85 PathProgramCache]: Analyzing trace with hash -425061797, now seen corresponding path program 1 times [2022-12-14 11:30:20,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:30:20,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848261095] [2022-12-14 11:30:20,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:20,245 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 [2022-12-14 11:30:20,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:30:20,247 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:30:20,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:30:20,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:20,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:30:20,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:20,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:20,555 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 25 treesize of output 21 [2022-12-14 11:30:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:20,616 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:30:20,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848261095] [2022-12-14 11:30:20,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848261095] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:20,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1511227447] [2022-12-14 11:30:20,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:20,616 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:30:20,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:30:20,617 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:30:20,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-12-14 11:30:20,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:20,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:30:20,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:20,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:21,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:21,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1511227447] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:21,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476664482] [2022-12-14 11:30:21,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:21,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:21,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:30:21,098 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:30:21,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 11:30:21,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:21,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 11:30:21,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:21,265 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:30:21,266 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 [2022-12-14 11:30:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:21,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:21,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476664482] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:21,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:30:21,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 22 [2022-12-14 11:30:21,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586933235] [2022-12-14 11:30:21,820 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:30:21,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 11:30:21,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:30:21,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 11:30:21,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-12-14 11:30:21,822 INFO L87 Difference]: Start difference. First operand 827 states and 3301 transitions. Second operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 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) [2022-12-14 11:30:27,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:27,480 INFO L93 Difference]: Finished difference Result 2820 states and 11823 transitions. [2022-12-14 11:30:27,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 11:30:27,481 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 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 8 [2022-12-14 11:30:27,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:27,488 INFO L225 Difference]: With dead ends: 2820 [2022-12-14 11:30:27,488 INFO L226 Difference]: Without dead ends: 2820 [2022-12-14 11:30:27,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=350, Invalid=1372, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 11:30:27,489 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 831 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:27,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 50 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-12-14 11:30:27,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2022-12-14 11:30:27,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 907. [2022-12-14 11:30:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 879 states have (on average 4.408418657565416) internal successors, (3875), 906 states have internal predecessors, (3875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:30:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 3875 transitions. [2022-12-14 11:30:27,518 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 3875 transitions. Word has length 8 [2022-12-14 11:30:27,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:27,518 INFO L495 AbstractCegarLoop]: Abstraction has 907 states and 3875 transitions. [2022-12-14 11:30:27,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 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) [2022-12-14 11:30:27,519 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 3875 transitions. [2022-12-14 11:30:27,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 11:30:27,519 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:27,519 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-12-14 11:30:27,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:30:27,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2022-12-14 11:30:27,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-14 11:30:28,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:28,121 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:30:28,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:28,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1990790680, now seen corresponding path program 1 times [2022-12-14 11:30:28,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:30:28,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1559693518] [2022-12-14 11:30:28,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:28,124 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 [2022-12-14 11:30:28,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:30:28,126 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:30:28,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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)] Waiting until timeout for monitored process [2022-12-14 11:30:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:28,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:30:28,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:30:28,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:30:28,237 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:30:28,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1559693518] [2022-12-14 11:30:28,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1559693518] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:30:28,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:30:28,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:30:28,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366706641] [2022-12-14 11:30:28,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:30:28,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:30:28,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:30:28,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:30:28,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:30:28,239 INFO L87 Difference]: Start difference. First operand 907 states and 3875 transitions. Second operand has 3 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) [2022-12-14 11:30:28,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:28,461 INFO L93 Difference]: Finished difference Result 1161 states and 4653 transitions. [2022-12-14 11:30:28,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:30:28,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 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 8 [2022-12-14 11:30:28,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:28,464 INFO L225 Difference]: With dead ends: 1161 [2022-12-14 11:30:28,464 INFO L226 Difference]: Without dead ends: 1161 [2022-12-14 11:30:28,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:30:28,464 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:28,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 5 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:30:28,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2022-12-14 11:30:28,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 907. [2022-12-14 11:30:28,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 879 states have (on average 4.310580204778157) internal successors, (3789), 906 states have internal predecessors, (3789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:30:28,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 3789 transitions. [2022-12-14 11:30:28,482 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 3789 transitions. Word has length 8 [2022-12-14 11:30:28,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:28,482 INFO L495 AbstractCegarLoop]: Abstraction has 907 states and 3789 transitions. [2022-12-14 11:30:28,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2022-12-14 11:30:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 3789 transitions. [2022-12-14 11:30:28,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 11:30:28,483 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:28,483 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:30:28,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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)] Forceful destruction successful, exit code 0 [2022-12-14 11:30:28,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:30:28,684 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:30:28,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:28,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1585041656, now seen corresponding path program 1 times [2022-12-14 11:30:28,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:30:28,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1003679843] [2022-12-14 11:30:28,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:28,687 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 [2022-12-14 11:30:28,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:30:28,689 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:30:28,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (31)] Waiting until timeout for monitored process [2022-12-14 11:30:28,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:28,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 11:30:28,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:28,902 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:30:28,902 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 [2022-12-14 11:30:29,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:30:29,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:30:29,839 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:30:29,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1003679843] [2022-12-14 11:30:29,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1003679843] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:29,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1180643001] [2022-12-14 11:30:29,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:29,840 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:30:29,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:30:29,841 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:30:29,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-12-14 11:30:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:29,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:30:29,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:30,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:30,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1180643001] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:30,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247058222] [2022-12-14 11:30:30,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:30,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:30,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:30:30,826 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:30:30,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 11:30:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:30,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:30:30,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:31,004 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:30:31,004 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 [2022-12-14 11:30:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:30:31,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:31,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:30:31,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247058222] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:31,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:30:31,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 4, 4] total 22 [2022-12-14 11:30:31,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561893009] [2022-12-14 11:30:31,265 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:30:31,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 11:30:31,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:30:31,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 11:30:31,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-12-14 11:30:31,265 INFO L87 Difference]: Start difference. First operand 907 states and 3789 transitions. Second operand has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:30:39,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:39,132 INFO L93 Difference]: Finished difference Result 2904 states and 11894 transitions. [2022-12-14 11:30:39,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 11:30:39,134 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 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 [2022-12-14 11:30:39,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:39,141 INFO L225 Difference]: With dead ends: 2904 [2022-12-14 11:30:39,141 INFO L226 Difference]: Without dead ends: 2904 [2022-12-14 11:30:39,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=448, Invalid=1532, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 11:30:39,142 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 979 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:39,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [979 Valid, 137 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-12-14 11:30:39,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2022-12-14 11:30:39,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 1928. [2022-12-14 11:30:39,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1900 states have (on average 4.663684210526315) internal successors, (8861), 1927 states have internal predecessors, (8861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:30:39,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 8861 transitions. [2022-12-14 11:30:39,187 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 8861 transitions. Word has length 9 [2022-12-14 11:30:39,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:39,187 INFO L495 AbstractCegarLoop]: Abstraction has 1928 states and 8861 transitions. [2022-12-14 11:30:39,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 23 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:30:39,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 8861 transitions. [2022-12-14 11:30:39,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 11:30:39,188 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:39,188 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:30:39,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (31)] Ended with exit code 0 [2022-12-14 11:30:39,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2022-12-14 11:30:39,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-14 11:30:39,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:39,790 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:30:39,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:39,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1578179768, now seen corresponding path program 1 times [2022-12-14 11:30:39,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:30:39,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760833699] [2022-12-14 11:30:39,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:39,793 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 [2022-12-14 11:30:39,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:30:39,796 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:30:39,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (34)] Waiting until timeout for monitored process [2022-12-14 11:30:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:39,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:30:39,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:39,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:39,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:40,135 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 [2022-12-14 11:30:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:40,274 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:30:40,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760833699] [2022-12-14 11:30:40,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760833699] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:40,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1837919842] [2022-12-14 11:30:40,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:40,275 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:30:40,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:30:40,276 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:30:40,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-12-14 11:30:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:40,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 11:30:40,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:40,505 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:30:40,505 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 [2022-12-14 11:30:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:40,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:41,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1837919842] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:41,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485398528] [2022-12-14 11:30:41,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:41,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:41,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:30:41,147 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:30:41,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 11:30:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:41,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:30:41,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:41,309 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 11:30:41,309 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 42 [2022-12-14 11:30:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:41,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:41,700 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:41,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485398528] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:41,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:30:41,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 20 [2022-12-14 11:30:41,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046851860] [2022-12-14 11:30:41,701 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:30:41,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 11:30:41,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:30:41,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 11:30:41,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-12-14 11:30:41,703 INFO L87 Difference]: Start difference. First operand 1928 states and 8861 transitions. Second operand has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:30:43,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:43,868 INFO L93 Difference]: Finished difference Result 7136 states and 33235 transitions. [2022-12-14 11:30:43,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 11:30:43,869 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 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 [2022-12-14 11:30:43,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:43,906 INFO L225 Difference]: With dead ends: 7136 [2022-12-14 11:30:43,906 INFO L226 Difference]: Without dead ends: 7136 [2022-12-14 11:30:43,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 11:30:43,907 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1323 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1323 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:43,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1323 Valid, 59 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 11:30:43,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7136 states. [2022-12-14 11:30:44,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7136 to 2178. [2022-12-14 11:30:44,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 2150 states have (on average 4.844186046511628) internal successors, (10415), 2177 states have internal predecessors, (10415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:30:44,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 10415 transitions. [2022-12-14 11:30:44,046 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 10415 transitions. Word has length 9 [2022-12-14 11:30:44,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:44,046 INFO L495 AbstractCegarLoop]: Abstraction has 2178 states and 10415 transitions. [2022-12-14 11:30:44,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:30:44,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 10415 transitions. [2022-12-14 11:30:44,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 11:30:44,047 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:44,047 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:30:44,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-14 11:30:44,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-12-14 11:30:44,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (34)] Forceful destruction successful, exit code 0 [2022-12-14 11:30:44,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:30:44,649 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:30:44,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:44,652 INFO L85 PathProgramCache]: Analyzing trace with hash -455559375, now seen corresponding path program 1 times [2022-12-14 11:30:44,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:30:44,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1116177697] [2022-12-14 11:30:44,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:44,653 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 [2022-12-14 11:30:44,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:30:44,654 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:30:44,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:30:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:44,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:30:44,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:44,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:45,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:45,058 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:30:45,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1116177697] [2022-12-14 11:30:45,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1116177697] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:45,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1415212213] [2022-12-14 11:30:45,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:45,059 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:30:45,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:30:45,060 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:30:45,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-12-14 11:30:45,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:45,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:30:45,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:45,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:45,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1415212213] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:45,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649731796] [2022-12-14 11:30:45,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:45,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:45,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:30:45,357 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:30:45,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 11:30:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:45,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:30:45,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:45,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:45,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:45,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649731796] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:45,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:30:45,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-12-14 11:30:45,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300180268] [2022-12-14 11:30:45,559 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:30:45,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 11:30:45,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:30:45,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 11:30:45,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:30:45,560 INFO L87 Difference]: Start difference. First operand 2178 states and 10415 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:30:46,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:46,549 INFO L93 Difference]: Finished difference Result 2172 states and 10335 transitions. [2022-12-14 11:30:46,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:30:46,550 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 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 [2022-12-14 11:30:46,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:46,556 INFO L225 Difference]: With dead ends: 2172 [2022-12-14 11:30:46,556 INFO L226 Difference]: Without dead ends: 2172 [2022-12-14 11:30:46,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-12-14 11:30:46,557 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 109 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:46,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 33 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 11:30:46,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2022-12-14 11:30:46,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 2162. [2022-12-14 11:30:46,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2162 states, 2134 states have (on average 4.838331771321462) internal successors, (10325), 2161 states have internal predecessors, (10325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:30:46,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 10325 transitions. [2022-12-14 11:30:46,617 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 10325 transitions. Word has length 10 [2022-12-14 11:30:46,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:46,617 INFO L495 AbstractCegarLoop]: Abstraction has 2162 states and 10325 transitions. [2022-12-14 11:30:46,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:30:46,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 10325 transitions. [2022-12-14 11:30:46,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 11:30:46,618 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:46,629 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:30:46,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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)] Ended with exit code 0 [2022-12-14 11:30:46,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-12-14 11:30:47,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-14 11:30:47,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:47,232 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:30:47,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:47,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1678930267, now seen corresponding path program 1 times [2022-12-14 11:30:47,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:30:47,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094473207] [2022-12-14 11:30:47,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:47,234 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 [2022-12-14 11:30:47,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:30:47,237 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:30:47,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:30:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:47,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:30:47,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:30:47,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:30:47,360 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:30:47,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1094473207] [2022-12-14 11:30:47,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1094473207] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:30:47,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:30:47,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:30:47,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521227069] [2022-12-14 11:30:47,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:30:47,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:30:47,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:30:47,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:30:47,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:30:47,362 INFO L87 Difference]: Start difference. First operand 2162 states and 10325 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-12-14 11:30:47,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:47,596 INFO L93 Difference]: Finished difference Result 2674 states and 11955 transitions. [2022-12-14 11:30:47,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:30:47,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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 10 [2022-12-14 11:30:47,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:47,603 INFO L225 Difference]: With dead ends: 2674 [2022-12-14 11:30:47,603 INFO L226 Difference]: Without dead ends: 2674 [2022-12-14 11:30:47,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:30:47,604 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:47,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 5 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:30:47,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2022-12-14 11:30:47,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 2162. [2022-12-14 11:30:47,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2162 states, 2134 states have (on average 4.721180880974695) internal successors, (10075), 2161 states have internal predecessors, (10075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:30:47,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 10075 transitions. [2022-12-14 11:30:47,639 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 10075 transitions. Word has length 10 [2022-12-14 11:30:47,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:47,640 INFO L495 AbstractCegarLoop]: Abstraction has 2162 states and 10075 transitions. [2022-12-14 11:30:47,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 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) [2022-12-14 11:30:47,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 10075 transitions. [2022-12-14 11:30:47,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 11:30:47,640 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:47,640 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:30:47,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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)] Ended with exit code 0 [2022-12-14 11:30:47,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:30:47,842 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:30:47,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:47,843 INFO L85 PathProgramCache]: Analyzing trace with hash -500388280, now seen corresponding path program 2 times [2022-12-14 11:30:47,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:30:47,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638071674] [2022-12-14 11:30:47,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:30:47,844 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 [2022-12-14 11:30:47,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:30:47,847 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:30:47,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:30:48,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 11:30:48,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:30:48,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 11:30:48,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:48,208 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:30:48,209 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 [2022-12-14 11:30:48,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:30:48,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:30:48,361 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:30:48,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638071674] [2022-12-14 11:30:48,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638071674] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:30:48,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:30:48,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:30:48,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368356837] [2022-12-14 11:30:48,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:30:48,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:30:48,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:30:48,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:30:48,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:30:48,363 INFO L87 Difference]: Start difference. First operand 2162 states and 10075 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) [2022-12-14 11:30:48,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:30:48,738 INFO L93 Difference]: Finished difference Result 1486 states and 6767 transitions. [2022-12-14 11:30:48,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:30:48,739 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 11 [2022-12-14 11:30:48,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:30:48,743 INFO L225 Difference]: With dead ends: 1486 [2022-12-14 11:30:48,743 INFO L226 Difference]: Without dead ends: 1486 [2022-12-14 11:30:48,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:30:48,744 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 77 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:30:48,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 6 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:30:48,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2022-12-14 11:30:48,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1486. [2022-12-14 11:30:48,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1486 states, 1476 states have (on average 4.5846883468834685) internal successors, (6767), 1485 states have internal predecessors, (6767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:30:48,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 6767 transitions. [2022-12-14 11:30:48,779 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 6767 transitions. Word has length 11 [2022-12-14 11:30:48,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:30:48,780 INFO L495 AbstractCegarLoop]: Abstraction has 1486 states and 6767 transitions. [2022-12-14 11:30:48,780 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) [2022-12-14 11:30:48,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 6767 transitions. [2022-12-14 11:30:48,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 11:30:48,780 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:30:48,780 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:30:48,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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)] Ended with exit code 0 [2022-12-14 11:30:48,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:30:48,982 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:30:48,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:30:48,983 INFO L85 PathProgramCache]: Analyzing trace with hash -507273895, now seen corresponding path program 1 times [2022-12-14 11:30:48,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:30:48,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1575184481] [2022-12-14 11:30:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:48,983 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 [2022-12-14 11:30:48,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:30:48,985 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:30:48,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:30:49,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:49,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 11:30:49,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:49,231 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:30:49,231 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 [2022-12-14 11:30:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:30:49,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:30:50,157 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:30:50,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1575184481] [2022-12-14 11:30:50,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1575184481] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:50,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1701564595] [2022-12-14 11:30:50,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:50,158 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:30:50,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:30:50,159 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:30:50,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-12-14 11:30:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:50,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 11:30:50,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:50,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:50,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:51,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:51,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1701564595] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:51,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255700116] [2022-12-14 11:30:51,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:30:51,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:30:51,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:30:51,229 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:30:51,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-14 11:30:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:30:51,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 11:30:51,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:30:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:51,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:30:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:30:51,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255700116] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:30:51,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:30:51,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7, 7, 7, 7] total 27 [2022-12-14 11:30:51,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612478172] [2022-12-14 11:30:51,731 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:30:51,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-14 11:30:51,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:30:51,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-14 11:30:51,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2022-12-14 11:30:51,732 INFO L87 Difference]: Start difference. First operand 1486 states and 6767 transitions. Second operand has 29 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:31:04,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:31:04,745 INFO L93 Difference]: Finished difference Result 3434 states and 15791 transitions. [2022-12-14 11:31:04,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 11:31:04,746 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 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 [2022-12-14 11:31:04,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:31:04,755 INFO L225 Difference]: With dead ends: 3434 [2022-12-14 11:31:04,755 INFO L226 Difference]: Without dead ends: 3434 [2022-12-14 11:31:04,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=548, Invalid=2104, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 11:31:04,756 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1027 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1027 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:31:04,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1027 Valid, 104 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1659 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-12-14 11:31:04,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2022-12-14 11:31:04,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 2514. [2022-12-14 11:31:04,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2514 states, 2504 states have (on average 5.0842651757188495) internal successors, (12731), 2513 states have internal predecessors, (12731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:31:04,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2514 states to 2514 states and 12731 transitions. [2022-12-14 11:31:04,821 INFO L78 Accepts]: Start accepts. Automaton has 2514 states and 12731 transitions. Word has length 11 [2022-12-14 11:31:04,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:31:04,821 INFO L495 AbstractCegarLoop]: Abstraction has 2514 states and 12731 transitions. [2022-12-14 11:31:04,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:31:04,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2514 states and 12731 transitions. [2022-12-14 11:31:04,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 11:31:04,822 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:31:04,822 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:31:04,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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)] Ended with exit code 0 [2022-12-14 11:31:05,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2022-12-14 11:31:05,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-12-14 11:31:05,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:31:05,425 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:31:05,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:31:05,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1936478609, now seen corresponding path program 1 times [2022-12-14 11:31:05,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:31:05,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768685475] [2022-12-14 11:31:05,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:05,428 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 [2022-12-14 11:31:05,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:31:05,430 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:31:05,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (45)] Waiting until timeout for monitored process [2022-12-14 11:31:05,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:31:05,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:31:05,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:31:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:31:05,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:31:06,288 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 [2022-12-14 11:31:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:31:06,665 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:31:06,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768685475] [2022-12-14 11:31:06,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768685475] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:31:06,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [437539608] [2022-12-14 11:31:06,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:06,665 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:31:06,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:31:06,666 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:31:06,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-12-14 11:31:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:31:06,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:31:06,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:31:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 11:31:06,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:31:06,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [437539608] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:31:06,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:31:06,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8, 8] total 18 [2022-12-14 11:31:06,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659655947] [2022-12-14 11:31:06,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:31:06,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:31:06,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:31:06,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:31:06,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-12-14 11:31:06,833 INFO L87 Difference]: Start difference. First operand 2514 states and 12731 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2022-12-14 11:31:07,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:31:07,045 INFO L93 Difference]: Finished difference Result 2618 states and 12225 transitions. [2022-12-14 11:31:07,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:31:07,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 [2022-12-14 11:31:07,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:31:07,052 INFO L225 Difference]: With dead ends: 2618 [2022-12-14 11:31:07,052 INFO L226 Difference]: Without dead ends: 2618 [2022-12-14 11:31:07,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-12-14 11:31:07,053 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:31:07,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 8 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:31:07,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2022-12-14 11:31:07,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 2124. [2022-12-14 11:31:07,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2117 states have (on average 4.71185640056684) internal successors, (9975), 2123 states have internal predecessors, (9975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:31:07,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 9975 transitions. [2022-12-14 11:31:07,093 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 9975 transitions. Word has length 11 [2022-12-14 11:31:07,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:31:07,093 INFO L495 AbstractCegarLoop]: Abstraction has 2124 states and 9975 transitions. [2022-12-14 11:31:07,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2022-12-14 11:31:07,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 9975 transitions. [2022-12-14 11:31:07,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 11:31:07,094 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:31:07,094 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 11:31:07,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (45)] Ended with exit code 0 [2022-12-14 11:31:07,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2022-12-14 11:31:07,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:31:07,496 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:31:07,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:31:07,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1722350577, now seen corresponding path program 3 times [2022-12-14 11:31:07,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:31:07,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551825288] [2022-12-14 11:31:07,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:31:07,499 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 [2022-12-14 11:31:07,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:31:07,502 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:31:07,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (47)] Waiting until timeout for monitored process [2022-12-14 11:31:07,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 11:31:07,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:31:07,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 11:31:07,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:31:07,792 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:31:07,792 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 [2022-12-14 11:31:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:31:08,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:31:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:31:10,412 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:31:10,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551825288] [2022-12-14 11:31:10,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551825288] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:31:10,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [758442713] [2022-12-14 11:31:10,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:31:10,413 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:31:10,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:31:10,413 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:31:10,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-12-14 11:31:11,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 11:31:11,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:31:11,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 11:31:11,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:31:11,120 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:31:11,121 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 [2022-12-14 11:31:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:31:11,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:31:11,507 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:31:11,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [758442713] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:31:11,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132916327] [2022-12-14 11:31:11,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:31:11,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:31:11,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:31:11,509 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:31:11,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-14 11:31:12,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 11:31:12,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:31:12,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 11:31:12,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:31:12,913 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:31:12,914 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 [2022-12-14 11:31:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:31:13,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:31:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:31:13,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132916327] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:31:13,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:31:13,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 22 [2022-12-14 11:31:13,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576788086] [2022-12-14 11:31:13,311 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:31:13,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 11:31:13,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:31:13,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 11:31:13,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-12-14 11:31:13,312 INFO L87 Difference]: Start difference. First operand 2124 states and 9975 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 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) [2022-12-14 11:31:33,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:31:33,007 INFO L93 Difference]: Finished difference Result 34484 states and 172256 transitions. [2022-12-14 11:31:33,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 11:31:33,009 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 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 12 [2022-12-14 11:31:33,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:31:33,136 INFO L225 Difference]: With dead ends: 34484 [2022-12-14 11:31:33,136 INFO L226 Difference]: Without dead ends: 34484 [2022-12-14 11:31:33,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 11:31:33,137 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 3929 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 3113 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3929 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 3115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:31:33,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3929 Valid, 360 Invalid, 3115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3113 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2022-12-14 11:31:33,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34484 states. [2022-12-14 11:31:33,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34484 to 2136. [2022-12-14 11:31:33,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2136 states, 2129 states have (on average 4.696571160169094) internal successors, (9999), 2135 states have internal predecessors, (9999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:31:33,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2136 states to 2136 states and 9999 transitions. [2022-12-14 11:31:33,405 INFO L78 Accepts]: Start accepts. Automaton has 2136 states and 9999 transitions. Word has length 12 [2022-12-14 11:31:33,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:31:33,405 INFO L495 AbstractCegarLoop]: Abstraction has 2136 states and 9999 transitions. [2022-12-14 11:31:33,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 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) [2022-12-14 11:31:33,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2136 states and 9999 transitions. [2022-12-14 11:31:33,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 11:31:33,407 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:31:33,407 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:31:33,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (47)] Forceful destruction successful, exit code 0 [2022-12-14 11:31:33,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-12-14 11:31:33,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (48)] Ended with exit code 0 [2022-12-14 11:31:34,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:31:34,009 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:31:34,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:31:34,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1323475979, now seen corresponding path program 1 times [2022-12-14 11:31:34,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:31:34,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406699390] [2022-12-14 11:31:34,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:31:34,012 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 [2022-12-14 11:31:34,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:31:34,014 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:31:34,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (50)] Waiting until timeout for monitored process [2022-12-14 11:31:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:31:34,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:31:34,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:31:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 11:31:34,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:31:34,211 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:31:34,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406699390] [2022-12-14 11:31:34,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406699390] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:31:34,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:31:34,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:31:34,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259539318] [2022-12-14 11:31:34,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:31:34,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:31:34,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:31:34,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:31:34,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:31:34,212 INFO L87 Difference]: Start difference. First operand 2136 states and 9999 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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) [2022-12-14 11:31:34,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:31:34,411 INFO L93 Difference]: Finished difference Result 2144 states and 9243 transitions. [2022-12-14 11:31:34,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:31:34,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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 13 [2022-12-14 11:31:34,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:31:34,416 INFO L225 Difference]: With dead ends: 2144 [2022-12-14 11:31:34,416 INFO L226 Difference]: Without dead ends: 2144 [2022-12-14 11:31:34,416 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 [2022-12-14 11:31:34,417 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:31:34,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 8 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:31:34,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2022-12-14 11:31:34,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1806. [2022-12-14 11:31:34,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1801 states have (on average 4.32870627429206) internal successors, (7796), 1805 states have internal predecessors, (7796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:31:34,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 7796 transitions. [2022-12-14 11:31:34,444 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 7796 transitions. Word has length 13 [2022-12-14 11:31:34,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:31:34,444 INFO L495 AbstractCegarLoop]: Abstraction has 1806 states and 7796 transitions. [2022-12-14 11:31:34,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 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) [2022-12-14 11:31:34,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 7796 transitions. [2022-12-14 11:31:34,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 11:31:34,445 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:31:34,446 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2022-12-14 11:31:34,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (50)] Ended with exit code 0 [2022-12-14 11:31:34,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:31:34,647 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:31:34,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:31:34,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1531255809, now seen corresponding path program 2 times [2022-12-14 11:31:34,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:31:34,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722475820] [2022-12-14 11:31:34,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:31:34,650 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 [2022-12-14 11:31:34,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:31:34,653 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:31:34,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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)] Waiting until timeout for monitored process [2022-12-14 11:31:34,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:31:34,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:31:34,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 11:31:34,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:31:34,920 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:31:34,920 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 [2022-12-14 11:31:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:31:35,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:31:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:31:37,165 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:31:37,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722475820] [2022-12-14 11:31:37,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722475820] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:31:37,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [256198928] [2022-12-14 11:31:37,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:31:37,166 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:31:37,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:31:37,167 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:31:37,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-12-14 11:31:37,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:31:37,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:31:37,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 11:31:37,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:31:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:31:38,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:31:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:31:39,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [256198928] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:31:39,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248908343] [2022-12-14 11:31:39,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:31:39,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:31:39,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:31:39,572 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:31:39,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-14 11:31:39,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:31:39,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:31:39,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:31:39,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:31:39,808 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:31:39,808 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 [2022-12-14 11:31:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:31:40,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:31:42,290 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:31:42,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248908343] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:31:42,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:31:42,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9, 9, 9, 9] total 53 [2022-12-14 11:31:42,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541747161] [2022-12-14 11:31:42,291 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:31:42,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-14 11:31:42,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:31:42,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-14 11:31:42,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2590, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 11:31:42,293 INFO L87 Difference]: Start difference. First operand 1806 states and 7796 transitions. Second operand has 54 states, 54 states have (on average 1.5740740740740742) internal successors, (85), 53 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:32:25,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:32:25,994 INFO L93 Difference]: Finished difference Result 5840 states and 24589 transitions. [2022-12-14 11:32:25,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 11:32:25,997 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.5740740740740742) internal successors, (85), 53 states have internal predecessors, (85), 0 states have call successors, (0), 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 [2022-12-14 11:32:25,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:32:26,010 INFO L225 Difference]: With dead ends: 5840 [2022-12-14 11:32:26,010 INFO L226 Difference]: Without dead ends: 5840 [2022-12-14 11:32:26,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1746 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=960, Invalid=6350, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 11:32:26,012 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 2015 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 6079 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2015 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 6125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 6079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:32:26,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2015 Valid, 833 Invalid, 6125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 6079 Invalid, 0 Unknown, 0 Unchecked, 23.7s Time] [2022-12-14 11:32:26,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5840 states. [2022-12-14 11:32:26,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5840 to 2852. [2022-12-14 11:32:26,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2852 states, 2847 states have (on average 4.3744292237442925) internal successors, (12454), 2851 states have internal predecessors, (12454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:32:26,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 12454 transitions. [2022-12-14 11:32:26,076 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 12454 transitions. Word has length 16 [2022-12-14 11:32:26,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:32:26,076 INFO L495 AbstractCegarLoop]: Abstraction has 2852 states and 12454 transitions. [2022-12-14 11:32:26,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.5740740740740742) internal successors, (85), 53 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:32:26,076 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 12454 transitions. [2022-12-14 11:32:26,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 11:32:26,078 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:32:26,078 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:32:26,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-12-14 11:32:26,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2022-12-14 11:32:26,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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)] Forceful destruction successful, exit code 0 [2022-12-14 11:32:26,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:32:26,680 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:32:26,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:32:26,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1428667157, now seen corresponding path program 2 times [2022-12-14 11:32:26,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:32:26,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057219587] [2022-12-14 11:32:26,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:32:26,683 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 [2022-12-14 11:32:26,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:32:26,684 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:32:26,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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)] Waiting until timeout for monitored process [2022-12-14 11:32:26,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:32:26,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:32:26,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 11:32:26,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:32:27,082 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:32:27,083 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 [2022-12-14 11:32:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:32:27,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:32:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:32:29,249 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:32:29,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057219587] [2022-12-14 11:32:29,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057219587] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:32:29,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1663199055] [2022-12-14 11:32:29,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:32:29,249 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:32:29,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:32:29,250 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:32:29,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-12-14 11:32:29,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:32:29,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:32:29,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 11:32:29,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:32:30,339 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:32:30,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:32:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:32:31,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1663199055] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:32:31,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103695516] [2022-12-14 11:32:31,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:32:31,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:32:31,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:32:31,564 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:32:31,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-14 11:32:31,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:32:31,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:32:31,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:32:31,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:32:31,809 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:32:31,810 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 [2022-12-14 11:32:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:32:32,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:32:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:32:34,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103695516] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:32:34,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:32:34,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11, 10, 9, 9] total 55 [2022-12-14 11:32:34,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150285476] [2022-12-14 11:32:34,338 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:32:34,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-14 11:32:34,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:32:34,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-14 11:32:34,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=2818, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 11:32:34,340 INFO L87 Difference]: Start difference. First operand 2852 states and 12454 transitions. Second operand has 56 states, 56 states have (on average 1.7142857142857142) internal successors, (96), 55 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:33:12,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:33:12,243 INFO L93 Difference]: Finished difference Result 5534 states and 23037 transitions. [2022-12-14 11:33:12,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 11:33:12,246 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.7142857142857142) internal successors, (96), 55 states have internal predecessors, (96), 0 states have call successors, (0), 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 [2022-12-14 11:33:12,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:33:12,259 INFO L225 Difference]: With dead ends: 5534 [2022-12-14 11:33:12,259 INFO L226 Difference]: Without dead ends: 5534 [2022-12-14 11:33:12,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1928 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=1106, Invalid=7084, Unknown=0, NotChecked=0, Total=8190 [2022-12-14 11:33:12,261 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2225 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 7740 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2225 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 7788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 7740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:33:12,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2225 Valid, 651 Invalid, 7788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 7740 Invalid, 0 Unknown, 0 Unchecked, 23.9s Time] [2022-12-14 11:33:12,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5534 states. [2022-12-14 11:33:12,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5534 to 3052. [2022-12-14 11:33:12,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3052 states, 3047 states have (on average 4.387266163439449) internal successors, (13368), 3051 states have internal predecessors, (13368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:33:12,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3052 states to 3052 states and 13368 transitions. [2022-12-14 11:33:12,321 INFO L78 Accepts]: Start accepts. Automaton has 3052 states and 13368 transitions. Word has length 18 [2022-12-14 11:33:12,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:33:12,321 INFO L495 AbstractCegarLoop]: Abstraction has 3052 states and 13368 transitions. [2022-12-14 11:33:12,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.7142857142857142) internal successors, (96), 55 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:33:12,322 INFO L276 IsEmpty]: Start isEmpty. Operand 3052 states and 13368 transitions. [2022-12-14 11:33:12,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 11:33:12,324 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:33:12,324 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1] [2022-12-14 11:33:12,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2022-12-14 11:33:12,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-12-14 11:33:12,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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)] Ended with exit code 0 [2022-12-14 11:33:12,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:33:12,926 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:33:12,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:33:12,927 INFO L85 PathProgramCache]: Analyzing trace with hash 956716769, now seen corresponding path program 3 times [2022-12-14 11:33:12,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:33:12,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [211687918] [2022-12-14 11:33:12,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:33:12,929 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 [2022-12-14 11:33:12,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:33:12,931 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:33:12,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (57)] Waiting until timeout for monitored process [2022-12-14 11:33:13,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 11:33:13,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:33:13,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 11:33:13,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:33:13,387 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:33:13,388 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 [2022-12-14 11:33:13,899 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:33:13,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:33:18,305 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:33:18,305 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:33:18,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [211687918] [2022-12-14 11:33:18,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [211687918] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:33:18,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [303715326] [2022-12-14 11:33:18,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:33:18,306 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:33:18,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:33:18,307 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:33:18,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-12-14 11:33:21,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 11:33:21,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:33:21,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 11:33:21,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:33:21,221 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:33:21,221 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 [2022-12-14 11:33:21,483 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 17 treesize of output 13 [2022-12-14 11:33:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:33:21,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:33:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:33:26,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [303715326] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:33:26,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235576891] [2022-12-14 11:33:26,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:33:26,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:33:26,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:33:26,920 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:33:26,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-14 11:33:27,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 11:33:27,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:33:27,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 11:33:27,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:33:27,730 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:33:27,730 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 [2022-12-14 11:33:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 11:33:28,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:33:31,739 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 11:33:31,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235576891] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:33:31,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:33:31,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13, 14, 7, 7] total 54 [2022-12-14 11:33:31,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034150675] [2022-12-14 11:33:31,739 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:33:31,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-12-14 11:33:31,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:33:31,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-12-14 11:33:31,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=2561, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 11:33:31,742 INFO L87 Difference]: Start difference. First operand 3052 states and 13368 transitions. Second operand has 56 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 55 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:12,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:34:12,237 INFO L93 Difference]: Finished difference Result 9853 states and 41180 transitions. [2022-12-14 11:34:12,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-14 11:34:12,240 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 55 states have internal predecessors, (84), 0 states have call successors, (0), 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 [2022-12-14 11:34:12,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:34:12,264 INFO L225 Difference]: With dead ends: 9853 [2022-12-14 11:34:12,264 INFO L226 Difference]: Without dead ends: 9853 [2022-12-14 11:34:12,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2636 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=2374, Invalid=8546, Unknown=0, NotChecked=0, Total=10920 [2022-12-14 11:34:12,266 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 6959 mSDsluCounter, 1064 mSDsCounter, 0 mSdLazyCounter, 8058 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6959 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 8299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 8058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:34:12,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6959 Valid, 1121 Invalid, 8299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 8058 Invalid, 0 Unknown, 0 Unchecked, 22.0s Time] [2022-12-14 11:34:12,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9853 states. [2022-12-14 11:34:12,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9853 to 6025. [2022-12-14 11:34:12,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6025 states, 6020 states have (on average 4.4775747508305646) internal successors, (26955), 6024 states have internal predecessors, (26955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:12,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6025 states to 6025 states and 26955 transitions. [2022-12-14 11:34:12,405 INFO L78 Accepts]: Start accepts. Automaton has 6025 states and 26955 transitions. Word has length 18 [2022-12-14 11:34:12,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:34:12,405 INFO L495 AbstractCegarLoop]: Abstraction has 6025 states and 26955 transitions. [2022-12-14 11:34:12,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 55 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:34:12,406 INFO L276 IsEmpty]: Start isEmpty. Operand 6025 states and 26955 transitions. [2022-12-14 11:34:12,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-14 11:34:12,411 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:34:12,411 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:34:12,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (57)] Forceful destruction successful, exit code 0 [2022-12-14 11:34:12,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-12-14 11:34:12,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (58)] Ended with exit code 0 [2022-12-14 11:34:13,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:34:13,013 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:34:13,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:34:13,014 INFO L85 PathProgramCache]: Analyzing trace with hash -947536395, now seen corresponding path program 3 times [2022-12-14 11:34:13,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:34:13,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145503421] [2022-12-14 11:34:13,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:34:13,015 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 [2022-12-14 11:34:13,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:34:13,018 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:34:13,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (60)] Waiting until timeout for monitored process [2022-12-14 11:34:13,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 11:34:13,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:34:13,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 11:34:13,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:13,535 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:34:13,536 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 [2022-12-14 11:34:13,661 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 [2022-12-14 11:34:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:34:13,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:15,101 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:34:15,101 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:34:15,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145503421] [2022-12-14 11:34:15,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145503421] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:15,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2065613913] [2022-12-14 11:34:15,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:34:15,102 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:34:15,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:34:15,103 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:34:15,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-12-14 11:34:17,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 11:34:17,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:34:17,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 11:34:17,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:17,982 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:34:17,982 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 [2022-12-14 11:34:18,790 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 17 treesize of output 13 [2022-12-14 11:34:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:34:18,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:22,101 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:34:22,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2065613913] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:22,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133244262] [2022-12-14 11:34:22,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:34:22,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:34:22,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:34:22,102 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:34:22,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-12-14 11:34:22,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 11:34:22,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:34:22,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 11:34:22,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:34:23,978 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:34:23,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:34:26,760 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:34:26,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133244262] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:34:26,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:34:26,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13, 13, 14, 14] total 65 [2022-12-14 11:34:26,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817050842] [2022-12-14 11:34:26,761 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:34:26,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-12-14 11:34:26,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:34:26,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-12-14 11:34:26,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=3885, Unknown=0, NotChecked=0, Total=4422 [2022-12-14 11:34:26,764 INFO L87 Difference]: Start difference. First operand 6025 states and 26955 transitions. Second operand has 67 states, 66 states have (on average 1.5757575757575757) internal successors, (104), 66 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:35:17,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:35:17,602 INFO L93 Difference]: Finished difference Result 7861 states and 31584 transitions. [2022-12-14 11:35:17,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-12-14 11:35:17,605 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.5757575757575757) internal successors, (104), 66 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-14 11:35:17,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:35:17,622 INFO L225 Difference]: With dead ends: 7861 [2022-12-14 11:35:17,622 INFO L226 Difference]: Without dead ends: 7861 [2022-12-14 11:35:17,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3517 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=2260, Invalid=10622, Unknown=0, NotChecked=0, Total=12882 [2022-12-14 11:35:17,624 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 4662 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 12929 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4662 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 13072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 12929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:35:17,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4662 Valid, 940 Invalid, 13072 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [143 Valid, 12929 Invalid, 0 Unknown, 0 Unchecked, 33.5s Time] [2022-12-14 11:35:17,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7861 states. [2022-12-14 11:35:17,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7861 to 5725. [2022-12-14 11:35:17,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5725 states, 5720 states have (on average 4.441083916083916) internal successors, (25403), 5724 states have internal predecessors, (25403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:35:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5725 states to 5725 states and 25403 transitions. [2022-12-14 11:35:17,729 INFO L78 Accepts]: Start accepts. Automaton has 5725 states and 25403 transitions. Word has length 20 [2022-12-14 11:35:17,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:35:17,729 INFO L495 AbstractCegarLoop]: Abstraction has 5725 states and 25403 transitions. [2022-12-14 11:35:17,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.5757575757575757) internal successors, (104), 66 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:35:17,729 INFO L276 IsEmpty]: Start isEmpty. Operand 5725 states and 25403 transitions. [2022-12-14 11:35:17,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 11:35:17,733 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:35:17,733 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:35:17,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (60)] Ended with exit code 0 [2022-12-14 11:35:17,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (61)] Ended with exit code 0 [2022-12-14 11:35:18,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-12-14 11:35:18,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:35:18,335 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:35:18,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:35:18,336 INFO L85 PathProgramCache]: Analyzing trace with hash 414704241, now seen corresponding path program 1 times [2022-12-14 11:35:18,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:35:18,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619189159] [2022-12-14 11:35:18,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:35:18,338 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 [2022-12-14 11:35:18,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:35:18,340 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:35:18,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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)] Waiting until timeout for monitored process [2022-12-14 11:35:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:35:18,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 11:35:18,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:35:18,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:35:18,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:35:18,573 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:35:18,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619189159] [2022-12-14 11:35:18,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1619189159] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:35:18,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:35:18,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:35:18,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620125055] [2022-12-14 11:35:18,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:35:18,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:35:18,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:35:18,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:35:18,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:35:18,574 INFO L87 Difference]: Start difference. First operand 5725 states and 25403 transitions. Second operand has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:35:18,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:35:18,773 INFO L93 Difference]: Finished difference Result 6106 states and 26602 transitions. [2022-12-14 11:35:18,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:35:18,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2022-12-14 11:35:18,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:35:18,797 INFO L225 Difference]: With dead ends: 6106 [2022-12-14 11:35:18,797 INFO L226 Difference]: Without dead ends: 6002 [2022-12-14 11:35:18,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:35:18,798 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:35:18,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:35:18,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6002 states. [2022-12-14 11:35:18,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6002 to 5712. [2022-12-14 11:35:18,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5712 states, 5707 states have (on average 4.452076397406693) internal successors, (25408), 5711 states have internal predecessors, (25408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:35:18,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5712 states to 5712 states and 25408 transitions. [2022-12-14 11:35:18,929 INFO L78 Accepts]: Start accepts. Automaton has 5712 states and 25408 transitions. Word has length 21 [2022-12-14 11:35:18,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:35:18,929 INFO L495 AbstractCegarLoop]: Abstraction has 5712 states and 25408 transitions. [2022-12-14 11:35:18,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 10.5) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:35:18,929 INFO L276 IsEmpty]: Start isEmpty. Operand 5712 states and 25408 transitions. [2022-12-14 11:35:18,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 11:35:18,948 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:35:18,948 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:35:18,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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)] Ended with exit code 0 [2022-12-14 11:35:19,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:35:19,149 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:35:19,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:35:19,150 INFO L85 PathProgramCache]: Analyzing trace with hash -2112027572, now seen corresponding path program 4 times [2022-12-14 11:35:19,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:35:19,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732052030] [2022-12-14 11:35:19,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:35:19,153 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 [2022-12-14 11:35:19,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:35:19,156 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:35:19,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (64)] Waiting until timeout for monitored process [2022-12-14 11:35:19,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:35:19,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:35:19,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 11:35:19,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:35:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:35:19,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:35:20,596 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 [2022-12-14 11:35:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:35:21,942 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:35:21,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732052030] [2022-12-14 11:35:21,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732052030] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:35:21,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1609767371] [2022-12-14 11:35:21,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:35:21,943 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:35:21,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:35:21,944 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:35:21,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-12-14 11:35:22,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:35:22,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:35:22,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:35:22,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:35:22,398 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:35:22,398 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 [2022-12-14 11:35:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:35:23,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:35:26,921 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:35:26,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1609767371] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:35:26,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307974481] [2022-12-14 11:35:26,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:35:26,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:35:26,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:35:26,922 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:35:26,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-12-14 11:35:27,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:35:27,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:35:27,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:35:27,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:35:27,194 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:35:27,194 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 [2022-12-14 11:35:30,360 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:35:30,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:35:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:35:32,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307974481] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:35:32,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:35:32,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 69 [2022-12-14 11:35:32,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426857576] [2022-12-14 11:35:32,536 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:35:32,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-14 11:35:32,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:35:32,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-14 11:35:32,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=4490, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 11:35:32,538 INFO L87 Difference]: Start difference. First operand 5712 states and 25408 transitions. Second operand has 71 states, 70 states have (on average 1.5571428571428572) internal successors, (109), 70 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:56,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:36:56,363 INFO L93 Difference]: Finished difference Result 49537 states and 220528 transitions. [2022-12-14 11:36:56,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-12-14 11:36:56,365 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.5571428571428572) internal successors, (109), 70 states have internal predecessors, (109), 0 states have call successors, (0), 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 21 [2022-12-14 11:36:56,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:36:56,631 INFO L225 Difference]: With dead ends: 49537 [2022-12-14 11:36:56,631 INFO L226 Difference]: Without dead ends: 49537 [2022-12-14 11:36:56,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7313 ImplicationChecksByTransitivity, 74.0s TimeCoverageRelationStatistics Valid=3614, Invalid=19642, Unknown=0, NotChecked=0, Total=23256 [2022-12-14 11:36:56,633 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 7704 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 7890 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7704 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 8011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 7890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:36:56,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7704 Valid, 900 Invalid, 8011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 7890 Invalid, 0 Unknown, 0 Unchecked, 19.8s Time] [2022-12-14 11:36:56,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49537 states. [2022-12-14 11:36:57,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49537 to 8693. [2022-12-14 11:36:57,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8693 states, 8688 states have (on average 4.678522099447513) internal successors, (40647), 8692 states have internal predecessors, (40647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:57,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8693 states to 8693 states and 40647 transitions. [2022-12-14 11:36:57,123 INFO L78 Accepts]: Start accepts. Automaton has 8693 states and 40647 transitions. Word has length 21 [2022-12-14 11:36:57,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:36:57,123 INFO L495 AbstractCegarLoop]: Abstraction has 8693 states and 40647 transitions. [2022-12-14 11:36:57,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.5571428571428572) internal successors, (109), 70 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:36:57,123 INFO L276 IsEmpty]: Start isEmpty. Operand 8693 states and 40647 transitions. [2022-12-14 11:36:57,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 11:36:57,130 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:36:57,130 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:36:57,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (65)] Ended with exit code 0 [2022-12-14 11:36:57,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (64)] Ended with exit code 0 [2022-12-14 11:36:57,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-12-14 11:36:57,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:36:57,732 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:36:57,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:36:57,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1861061981, now seen corresponding path program 5 times [2022-12-14 11:36:57,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:36:57,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [66743378] [2022-12-14 11:36:57,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:36:57,735 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 [2022-12-14 11:36:57,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:36:57,738 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:36:57,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (67)] Waiting until timeout for monitored process [2022-12-14 11:36:58,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-14 11:36:58,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:36:58,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 11:36:58,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:36:58,141 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:36:58,141 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 [2022-12-14 11:36:59,168 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:36:59,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:37:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:04,706 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:37:04,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [66743378] [2022-12-14 11:37:04,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [66743378] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:37:04,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1311477773] [2022-12-14 11:37:04,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:37:04,707 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:37:04,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:37:04,708 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:37:04,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-12-14 11:37:05,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-14 11:37:05,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:37:05,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 11:37:05,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:37:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:08,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:37:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:12,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1311477773] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:37:12,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957364840] [2022-12-14 11:37:12,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:37:12,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:37:12,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:37:12,922 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:37:12,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-12-14 11:37:14,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-14 11:37:14,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:37:14,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 11:37:14,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:37:16,413 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:16,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:37:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:37:16,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957364840] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:37:16,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:37:16,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 16, 16, 16, 16] total 69 [2022-12-14 11:37:16,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485714778] [2022-12-14 11:37:16,856 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:37:16,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-12-14 11:37:16,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:37:16,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-12-14 11:37:16,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=4516, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 11:37:16,858 INFO L87 Difference]: Start difference. First operand 8693 states and 40647 transitions. Second operand has 71 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 70 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:39:36,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:39:36,901 INFO L93 Difference]: Finished difference Result 19149 states and 83985 transitions. [2022-12-14 11:39:36,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-12-14 11:39:36,904 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 70 states have internal predecessors, (100), 0 states have call successors, (0), 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 23 [2022-12-14 11:39:36,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:39:36,955 INFO L225 Difference]: With dead ends: 19149 [2022-12-14 11:39:36,956 INFO L226 Difference]: Without dead ends: 19149 [2022-12-14 11:39:36,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6784 ImplicationChecksByTransitivity, 82.8s TimeCoverageRelationStatistics Valid=3391, Invalid=20789, Unknown=0, NotChecked=0, Total=24180 [2022-12-14 11:39:36,957 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 8901 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 23685 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 64.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8901 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 24002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 23685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:39:36,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8901 Valid, 1600 Invalid, 24002 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [317 Valid, 23685 Invalid, 0 Unknown, 0 Unchecked, 69.9s Time] [2022-12-14 11:39:36,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19149 states. [2022-12-14 11:39:37,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19149 to 12055. [2022-12-14 11:39:37,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12055 states, 12050 states have (on average 4.7872199170124485) internal successors, (57686), 12054 states have internal predecessors, (57686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:39:37,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12055 states to 12055 states and 57686 transitions. [2022-12-14 11:39:37,249 INFO L78 Accepts]: Start accepts. Automaton has 12055 states and 57686 transitions. Word has length 23 [2022-12-14 11:39:37,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:39:37,249 INFO L495 AbstractCegarLoop]: Abstraction has 12055 states and 57686 transitions. [2022-12-14 11:39:37,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 70 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:39:37,249 INFO L276 IsEmpty]: Start isEmpty. Operand 12055 states and 57686 transitions. [2022-12-14 11:39:37,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:39:37,257 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:39:37,257 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:39:37,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-12-14 11:39:37,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (67)] Ended with exit code 0 [2022-12-14 11:39:37,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (68)] Ended with exit code 0 [2022-12-14 11:39:37,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:39:37,859 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:39:37,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:39:37,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1773398122, now seen corresponding path program 1 times [2022-12-14 11:39:37,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:39:37,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [241007236] [2022-12-14 11:39:37,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:37,862 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 [2022-12-14 11:39:37,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:39:37,865 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:39:37,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (70)] Waiting until timeout for monitored process [2022-12-14 11:39:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:38,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:39:38,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:38,135 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:39:38,135 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 [2022-12-14 11:39:38,181 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 [2022-12-14 11:39:38,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:39:38,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:39:38,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:39:38,841 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:39:38,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [241007236] [2022-12-14 11:39:38,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [241007236] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:39:38,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [630713518] [2022-12-14 11:39:38,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:38,841 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:39:38,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:39:38,842 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:39:38,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-12-14 11:39:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:39,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:39:39,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:39,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:39:39,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:39:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:39:39,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [630713518] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:39:39,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262924698] [2022-12-14 11:39:39,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:39:39,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:39:39,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:39:39,864 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:39:39,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-12-14 11:39:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:39:40,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:39:40,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:39:40,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:39:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:39:40,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262924698] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:39:40,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:39:40,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8, 8, 10, 9] total 34 [2022-12-14 11:39:40,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849016373] [2022-12-14 11:39:40,464 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:39:40,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 11:39:40,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:39:40,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 11:39:40,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=881, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 11:39:40,465 INFO L87 Difference]: Start difference. First operand 12055 states and 57686 transitions. Second operand has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:39:45,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:39:45,312 INFO L93 Difference]: Finished difference Result 13543 states and 61983 transitions. [2022-12-14 11:39:45,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 11:39:45,313 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 11:39:45,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:39:45,366 INFO L225 Difference]: With dead ends: 13543 [2022-12-14 11:39:45,366 INFO L226 Difference]: Without dead ends: 13543 [2022-12-14 11:39:45,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=988, Invalid=3044, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 11:39:45,367 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 764 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:39:45,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [764 Valid, 69 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1582 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 11:39:45,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13543 states. [2022-12-14 11:39:45,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13543 to 12247. [2022-12-14 11:39:45,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12247 states, 12242 states have (on average 4.725044927299461) internal successors, (57844), 12246 states have internal predecessors, (57844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:39:45,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12247 states to 12247 states and 57844 transitions. [2022-12-14 11:39:45,593 INFO L78 Accepts]: Start accepts. Automaton has 12247 states and 57844 transitions. Word has length 24 [2022-12-14 11:39:45,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:39:45,593 INFO L495 AbstractCegarLoop]: Abstraction has 12247 states and 57844 transitions. [2022-12-14 11:39:45,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:39:45,593 INFO L276 IsEmpty]: Start isEmpty. Operand 12247 states and 57844 transitions. [2022-12-14 11:39:45,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:39:45,601 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:39:45,601 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:39:45,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (71)] Ended with exit code 0 [2022-12-14 11:39:45,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-12-14 11:39:46,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (70)] Ended with exit code 0 [2022-12-14 11:39:46,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:39:46,203 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:39:46,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:39:46,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1252637470, now seen corresponding path program 2 times [2022-12-14 11:39:46,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:39:46,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532304739] [2022-12-14 11:39:46,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:39:46,206 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 [2022-12-14 11:39:46,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:39:46,209 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:39:46,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (73)] Waiting until timeout for monitored process [2022-12-14 11:39:46,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:39:46,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:39:46,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:39:46,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:39:46,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:39:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:39:46,864 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:39:46,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532304739] [2022-12-14 11:39:46,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532304739] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 11:39:46,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:39:46,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2022-12-14 11:39:46,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495427689] [2022-12-14 11:39:46,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:39:46,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:39:46,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:39:46,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:39:46,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-12-14 11:39:46,865 INFO L87 Difference]: Start difference. First operand 12247 states and 57844 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:39:47,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:39:47,949 INFO L93 Difference]: Finished difference Result 17147 states and 78161 transitions. [2022-12-14 11:39:47,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 11:39:47,951 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 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 24 [2022-12-14 11:39:47,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:39:48,010 INFO L225 Difference]: With dead ends: 17147 [2022-12-14 11:39:48,010 INFO L226 Difference]: Without dead ends: 17147 [2022-12-14 11:39:48,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-12-14 11:39:48,011 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 111 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:39:48,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 14 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 11:39:48,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17147 states. [2022-12-14 11:39:48,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17147 to 12705. [2022-12-14 11:39:48,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12705 states, 12700 states have (on average 4.744409448818898) internal successors, (60254), 12704 states have internal predecessors, (60254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:39:48,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12705 states to 12705 states and 60254 transitions. [2022-12-14 11:39:48,308 INFO L78 Accepts]: Start accepts. Automaton has 12705 states and 60254 transitions. Word has length 24 [2022-12-14 11:39:48,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:39:48,308 INFO L495 AbstractCegarLoop]: Abstraction has 12705 states and 60254 transitions. [2022-12-14 11:39:48,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:39:48,308 INFO L276 IsEmpty]: Start isEmpty. Operand 12705 states and 60254 transitions. [2022-12-14 11:39:48,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:39:48,329 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:39:48,329 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:39:48,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (73)] Ended with exit code 0 [2022-12-14 11:39:48,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:39:48,530 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:39:48,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:39:48,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1552924830, now seen corresponding path program 3 times [2022-12-14 11:39:48,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:39:48,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777272142] [2022-12-14 11:39:48,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:39:48,532 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 [2022-12-14 11:39:48,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:39:48,533 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:39:48,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:39:48,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 11:39:48,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:39:48,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:39:48,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:49,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:39:49,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:39:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:39:49,254 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:39:49,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777272142] [2022-12-14 11:39:49,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777272142] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 11:39:49,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:39:49,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2022-12-14 11:39:49,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721937318] [2022-12-14 11:39:49,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:39:49,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:39:49,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:39:49,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:39:49,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-12-14 11:39:49,256 INFO L87 Difference]: Start difference. First operand 12705 states and 60254 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:39:50,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:39:50,241 INFO L93 Difference]: Finished difference Result 13601 states and 63607 transitions. [2022-12-14 11:39:50,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:39:50,244 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 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 24 [2022-12-14 11:39:50,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:39:50,285 INFO L225 Difference]: With dead ends: 13601 [2022-12-14 11:39:50,285 INFO L226 Difference]: Without dead ends: 13601 [2022-12-14 11:39:50,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-12-14 11:39:50,286 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 111 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:39:50,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 12 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 11:39:50,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13601 states. [2022-12-14 11:39:50,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13601 to 12861. [2022-12-14 11:39:50,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12861 states, 12856 states have (on average 4.723942128189172) internal successors, (60731), 12860 states have internal predecessors, (60731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:39:50,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12861 states to 12861 states and 60731 transitions. [2022-12-14 11:39:50,664 INFO L78 Accepts]: Start accepts. Automaton has 12861 states and 60731 transitions. Word has length 24 [2022-12-14 11:39:50,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:39:50,664 INFO L495 AbstractCegarLoop]: Abstraction has 12861 states and 60731 transitions. [2022-12-14 11:39:50,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:39:50,665 INFO L276 IsEmpty]: Start isEmpty. Operand 12861 states and 60731 transitions. [2022-12-14 11:39:50,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:39:50,672 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:39:50,672 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:39:50,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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)] Ended with exit code 0 [2022-12-14 11:39:50,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:39:50,874 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:39:50,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:39:50,875 INFO L85 PathProgramCache]: Analyzing trace with hash -829341478, now seen corresponding path program 4 times [2022-12-14 11:39:50,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:39:50,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [807305886] [2022-12-14 11:39:50,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:39:50,877 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 [2022-12-14 11:39:50,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:39:50,881 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:39:50,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (75)] Waiting until timeout for monitored process [2022-12-14 11:39:51,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:39:51,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:39:51,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:39:51,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:51,482 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:39:51,482 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 [2022-12-14 11:39:51,538 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 [2022-12-14 11:39:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:39:51,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:39:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:39:52,246 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:39:52,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [807305886] [2022-12-14 11:39:52,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [807305886] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:39:52,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1433885080] [2022-12-14 11:39:52,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:39:52,247 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:39:52,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:39:52,247 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:39:52,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (76)] Waiting until timeout for monitored process [2022-12-14 11:39:52,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:39:52,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:39:52,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:39:52,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:39:52,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:39:53,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:39:53,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1433885080] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:39:53,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283048698] [2022-12-14 11:39:53,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:39:53,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:39:53,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:39:53,112 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:39:53,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-12-14 11:39:53,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:39:53,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:39:53,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:39:53,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:39:53,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:39:53,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:39:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:39:53,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283048698] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:39:53,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:39:53,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8, 8, 10, 9] total 32 [2022-12-14 11:39:53,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415938701] [2022-12-14 11:39:53,720 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:39:53,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 11:39:53,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:39:53,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 11:39:53,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2022-12-14 11:39:53,721 INFO L87 Difference]: Start difference. First operand 12861 states and 60731 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:02,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:40:02,264 INFO L93 Difference]: Finished difference Result 20955 states and 97104 transitions. [2022-12-14 11:40:02,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-12-14 11:40:02,266 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 11:40:02,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:40:02,341 INFO L225 Difference]: With dead ends: 20955 [2022-12-14 11:40:02,341 INFO L226 Difference]: Without dead ends: 20955 [2022-12-14 11:40:02,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 107 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1658 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1584, Invalid=5388, Unknown=0, NotChecked=0, Total=6972 [2022-12-14 11:40:02,342 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 556 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 3033 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 3045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:40:02,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 218 Invalid, 3045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 3033 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-12-14 11:40:02,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20955 states. [2022-12-14 11:40:02,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20955 to 13245. [2022-12-14 11:40:02,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13245 states, 13240 states have (on average 4.699773413897281) internal successors, (62225), 13244 states have internal predecessors, (62225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:02,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13245 states to 13245 states and 62225 transitions. [2022-12-14 11:40:02,782 INFO L78 Accepts]: Start accepts. Automaton has 13245 states and 62225 transitions. Word has length 24 [2022-12-14 11:40:02,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:40:02,783 INFO L495 AbstractCegarLoop]: Abstraction has 13245 states and 62225 transitions. [2022-12-14 11:40:02,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 32 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:02,783 INFO L276 IsEmpty]: Start isEmpty. Operand 13245 states and 62225 transitions. [2022-12-14 11:40:02,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:40:02,794 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:40:02,794 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:40:02,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (76)] Ended with exit code 0 [2022-12-14 11:40:03,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (75)] Ended with exit code 0 [2022-12-14 11:40:03,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-12-14 11:40:03,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:40:03,397 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:40:03,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:40:03,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1311305494, now seen corresponding path program 5 times [2022-12-14 11:40:03,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:40:03,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [885184470] [2022-12-14 11:40:03,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:40:03,400 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 [2022-12-14 11:40:03,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:40:03,401 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:40:03,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:40:03,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:40:03,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:03,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 11:40:03,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:04,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:40:04,619 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:40:04,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [885184470] [2022-12-14 11:40:04,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [885184470] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:04,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [361538468] [2022-12-14 11:40:04,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:40:04,620 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:40:04,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:40:04,620 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:40:04,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2022-12-14 11:40:04,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:40:04,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:04,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:40:04,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:40:05,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:40:05,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [361538468] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:05,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768172361] [2022-12-14 11:40:05,605 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:40:05,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:40:05,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:40:05,606 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:40:05,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-12-14 11:40:05,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:40:05,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:05,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:40:05,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:06,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:40:06,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:40:06,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768172361] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:06,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:40:06,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8, 8, 10, 9] total 35 [2022-12-14 11:40:06,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831436444] [2022-12-14 11:40:06,131 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:40:06,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 11:40:06,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:40:06,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 11:40:06,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 11:40:06,132 INFO L87 Difference]: Start difference. First operand 13245 states and 62225 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:12,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:40:12,753 INFO L93 Difference]: Finished difference Result 27691 states and 124160 transitions. [2022-12-14 11:40:12,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 11:40:12,755 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 11:40:12,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:40:12,856 INFO L225 Difference]: With dead ends: 27691 [2022-12-14 11:40:12,856 INFO L226 Difference]: Without dead ends: 27691 [2022-12-14 11:40:12,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1319, Invalid=4381, Unknown=0, NotChecked=0, Total=5700 [2022-12-14 11:40:12,857 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 580 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 2324 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 2334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:40:12,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 132 Invalid, 2334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2324 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-12-14 11:40:12,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27691 states. [2022-12-14 11:40:13,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27691 to 13425. [2022-12-14 11:40:13,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13425 states, 13420 states have (on average 4.7169895678092395) internal successors, (63302), 13424 states have internal predecessors, (63302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:13,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13425 states to 13425 states and 63302 transitions. [2022-12-14 11:40:13,259 INFO L78 Accepts]: Start accepts. Automaton has 13425 states and 63302 transitions. Word has length 24 [2022-12-14 11:40:13,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:40:13,259 INFO L495 AbstractCegarLoop]: Abstraction has 13425 states and 63302 transitions. [2022-12-14 11:40:13,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:13,259 INFO L276 IsEmpty]: Start isEmpty. Operand 13425 states and 63302 transitions. [2022-12-14 11:40:13,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:40:13,268 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:40:13,268 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:40:13,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (79)] Ended with exit code 0 [2022-12-14 11:40:13,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-12-14 11:40:13,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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)] Forceful destruction successful, exit code 0 [2022-12-14 11:40:13,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:40:13,870 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:40:13,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:40:13,872 INFO L85 PathProgramCache]: Analyzing trace with hash 178099502, now seen corresponding path program 6 times [2022-12-14 11:40:13,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:40:13,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349693490] [2022-12-14 11:40:13,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 11:40:13,874 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 [2022-12-14 11:40:13,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:40:13,875 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:40:13,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (81)] Waiting until timeout for monitored process [2022-12-14 11:40:14,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-14 11:40:14,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:14,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:40:14,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:40:14,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:40:14,558 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:40:14,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349693490] [2022-12-14 11:40:14,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349693490] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 11:40:14,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:40:14,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2022-12-14 11:40:14,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040343345] [2022-12-14 11:40:14,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:40:14,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:40:14,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:40:14,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:40:14,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-12-14 11:40:14,559 INFO L87 Difference]: Start difference. First operand 13425 states and 63302 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:15,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:40:15,759 INFO L93 Difference]: Finished difference Result 19483 states and 92618 transitions. [2022-12-14 11:40:15,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 11:40:15,761 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 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 24 [2022-12-14 11:40:15,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:40:15,817 INFO L225 Difference]: With dead ends: 19483 [2022-12-14 11:40:15,817 INFO L226 Difference]: Without dead ends: 19483 [2022-12-14 11:40:15,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-12-14 11:40:15,818 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 92 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:40:15,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 18 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 11:40:15,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19483 states. [2022-12-14 11:40:16,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19483 to 13581. [2022-12-14 11:40:16,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13581 states, 13576 states have (on average 4.720904537418975) internal successors, (64091), 13580 states have internal predecessors, (64091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:16,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13581 states to 13581 states and 64091 transitions. [2022-12-14 11:40:16,140 INFO L78 Accepts]: Start accepts. Automaton has 13581 states and 64091 transitions. Word has length 24 [2022-12-14 11:40:16,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:40:16,140 INFO L495 AbstractCegarLoop]: Abstraction has 13581 states and 64091 transitions. [2022-12-14 11:40:16,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:16,140 INFO L276 IsEmpty]: Start isEmpty. Operand 13581 states and 64091 transitions. [2022-12-14 11:40:16,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:40:16,149 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:40:16,149 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:40:16,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (81)] Forceful destruction successful, exit code 0 [2022-12-14 11:40:16,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:40:16,350 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:40:16,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:40:16,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1207079934, now seen corresponding path program 7 times [2022-12-14 11:40:16,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:40:16,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191474313] [2022-12-14 11:40:16,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:40:16,353 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 [2022-12-14 11:40:16,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:40:16,356 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:40:16,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (82)] Waiting until timeout for monitored process [2022-12-14 11:40:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:40:16,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:40:16,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:16,637 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:40:16,638 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 [2022-12-14 11:40:16,688 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 [2022-12-14 11:40:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:17,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:40:17,622 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:40:17,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191474313] [2022-12-14 11:40:17,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191474313] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:17,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [580547989] [2022-12-14 11:40:17,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:40:17,623 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:40:17,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:40:17,623 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:40:17,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (83)] Waiting until timeout for monitored process [2022-12-14 11:40:17,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:40:17,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:40:17,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:18,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:40:18,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:40:18,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [580547989] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:18,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156882693] [2022-12-14 11:40:18,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:40:18,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:40:18,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:40:18,746 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:40:18,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-12-14 11:40:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:40:18,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:40:18,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:40:19,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:40:19,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156882693] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:19,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:40:19,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8, 8, 10, 9] total 36 [2022-12-14 11:40:19,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532793400] [2022-12-14 11:40:19,578 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:40:19,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 11:40:19,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:40:19,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 11:40:19,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1001, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 11:40:19,579 INFO L87 Difference]: Start difference. First operand 13581 states and 64091 transitions. Second operand has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:27,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:40:27,554 INFO L93 Difference]: Finished difference Result 24005 states and 105968 transitions. [2022-12-14 11:40:27,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 11:40:27,556 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 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 24 [2022-12-14 11:40:27,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:40:27,624 INFO L225 Difference]: With dead ends: 24005 [2022-12-14 11:40:27,624 INFO L226 Difference]: Without dead ends: 24005 [2022-12-14 11:40:27,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1515 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1443, Invalid=4409, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 11:40:27,625 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 760 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2661 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 2693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:40:27,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 86 Invalid, 2693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2661 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-12-14 11:40:27,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24005 states. [2022-12-14 11:40:27,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24005 to 13739. [2022-12-14 11:40:27,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13739 states, 13734 states have (on average 4.725280326197757) internal successors, (64897), 13738 states have internal predecessors, (64897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:27,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13739 states to 13739 states and 64897 transitions. [2022-12-14 11:40:27,977 INFO L78 Accepts]: Start accepts. Automaton has 13739 states and 64897 transitions. Word has length 24 [2022-12-14 11:40:27,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:40:27,978 INFO L495 AbstractCegarLoop]: Abstraction has 13739 states and 64897 transitions. [2022-12-14 11:40:27,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:27,978 INFO L276 IsEmpty]: Start isEmpty. Operand 13739 states and 64897 transitions. [2022-12-14 11:40:27,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:40:27,987 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:40:27,987 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:40:27,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (83)] Ended with exit code 0 [2022-12-14 11:40:28,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-12-14 11:40:28,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (82)] Ended with exit code 0 [2022-12-14 11:40:28,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:40:28,590 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:40:28,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:40:28,590 INFO L85 PathProgramCache]: Analyzing trace with hash 282325062, now seen corresponding path program 8 times [2022-12-14 11:40:28,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:40:28,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586129366] [2022-12-14 11:40:28,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:40:28,592 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 [2022-12-14 11:40:28,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:40:28,593 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:40:28,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (85)] Waiting until timeout for monitored process [2022-12-14 11:40:28,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:40:28,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:28,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:40:28,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:29,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:40:29,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:40:29,342 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:40:29,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586129366] [2022-12-14 11:40:29,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586129366] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 11:40:29,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:40:29,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2022-12-14 11:40:29,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239664599] [2022-12-14 11:40:29,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:40:29,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:40:29,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:40:29,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:40:29,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-12-14 11:40:29,343 INFO L87 Difference]: Start difference. First operand 13739 states and 64897 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:30,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:40:30,716 INFO L93 Difference]: Finished difference Result 16621 states and 76220 transitions. [2022-12-14 11:40:30,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 11:40:30,718 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 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 24 [2022-12-14 11:40:30,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:40:30,800 INFO L225 Difference]: With dead ends: 16621 [2022-12-14 11:40:30,800 INFO L226 Difference]: Without dead ends: 16621 [2022-12-14 11:40:30,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2022-12-14 11:40:30,801 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 92 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:40:30,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 10 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 11:40:30,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16621 states. [2022-12-14 11:40:30,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16621 to 13727. [2022-12-14 11:40:31,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13727 states, 13722 states have (on average 4.7242384492056555) internal successors, (64826), 13726 states have internal predecessors, (64826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:31,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13727 states to 13727 states and 64826 transitions. [2022-12-14 11:40:31,062 INFO L78 Accepts]: Start accepts. Automaton has 13727 states and 64826 transitions. Word has length 24 [2022-12-14 11:40:31,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:40:31,063 INFO L495 AbstractCegarLoop]: Abstraction has 13727 states and 64826 transitions. [2022-12-14 11:40:31,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:31,063 INFO L276 IsEmpty]: Start isEmpty. Operand 13727 states and 64826 transitions. [2022-12-14 11:40:31,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:40:31,072 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:40:31,072 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:40:31,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (85)] Ended with exit code 0 [2022-12-14 11:40:31,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:40:31,273 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:40:31,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:40:31,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1632106190, now seen corresponding path program 9 times [2022-12-14 11:40:31,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:40:31,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623205112] [2022-12-14 11:40:31,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:40:31,277 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 [2022-12-14 11:40:31,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:40:31,280 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:40:31,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (86)] Waiting until timeout for monitored process [2022-12-14 11:40:31,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 11:40:31,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:31,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:40:31,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:31,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:40:31,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:40:31,808 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:40:31,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623205112] [2022-12-14 11:40:31,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623205112] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:40:31,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:40:31,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 11:40:31,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886786213] [2022-12-14 11:40:31,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:40:31,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 11:40:31,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:40:31,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 11:40:31,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:40:31,808 INFO L87 Difference]: Start difference. First operand 13727 states and 64826 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:32,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:40:32,456 INFO L93 Difference]: Finished difference Result 14231 states and 66514 transitions. [2022-12-14 11:40:32,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:40:32,458 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 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 24 [2022-12-14 11:40:32,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:40:32,501 INFO L225 Difference]: With dead ends: 14231 [2022-12-14 11:40:32,501 INFO L226 Difference]: Without dead ends: 14221 [2022-12-14 11:40:32,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:40:32,501 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 85 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:40:32,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 6 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:40:32,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14221 states. [2022-12-14 11:40:32,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14221 to 13751. [2022-12-14 11:40:32,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13751 states, 13746 states have (on average 4.722973956059945) internal successors, (64922), 13750 states have internal predecessors, (64922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:32,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13751 states to 13751 states and 64922 transitions. [2022-12-14 11:40:32,761 INFO L78 Accepts]: Start accepts. Automaton has 13751 states and 64922 transitions. Word has length 24 [2022-12-14 11:40:32,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:40:32,761 INFO L495 AbstractCegarLoop]: Abstraction has 13751 states and 64922 transitions. [2022-12-14 11:40:32,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:32,761 INFO L276 IsEmpty]: Start isEmpty. Operand 13751 states and 64922 transitions. [2022-12-14 11:40:32,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:40:32,771 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:40:32,771 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:40:32,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (86)] Ended with exit code 0 [2022-12-14 11:40:32,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:40:32,973 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:40:32,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:40:32,974 INFO L85 PathProgramCache]: Analyzing trace with hash 962961812, now seen corresponding path program 10 times [2022-12-14 11:40:32,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:40:32,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817728332] [2022-12-14 11:40:32,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:40:32,975 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 [2022-12-14 11:40:32,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:40:32,978 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:40:32,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (87)] Waiting until timeout for monitored process [2022-12-14 11:40:33,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:40:33,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:33,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:40:33,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:33,376 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:40:33,376 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 [2022-12-14 11:40:33,429 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 [2022-12-14 11:40:33,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:33,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:34,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:40:34,232 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:40:34,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [817728332] [2022-12-14 11:40:34,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [817728332] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:34,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1163887994] [2022-12-14 11:40:34,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:40:34,233 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:40:34,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:40:34,233 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:40:34,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (88)] Waiting until timeout for monitored process [2022-12-14 11:40:34,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:40:34,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:34,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:40:34,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:34,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:34,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:35,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:35,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1163887994] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:35,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468165491] [2022-12-14 11:40:35,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:40:35,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:40:35,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:40:35,468 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:40:35,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-12-14 11:40:35,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:40:35,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:35,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:40:35,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:40:36,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:40:36,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468165491] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:40:36,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-12-14 11:40:36,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 9, 8, 8] total 37 [2022-12-14 11:40:36,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899606827] [2022-12-14 11:40:36,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:40:36,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:40:36,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:40:36,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:40:36,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1078, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 11:40:36,120 INFO L87 Difference]: Start difference. First operand 13751 states and 64922 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:36,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:40:36,819 INFO L93 Difference]: Finished difference Result 14257 states and 66587 transitions. [2022-12-14 11:40:36,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:40:36,822 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 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 24 [2022-12-14 11:40:36,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:40:36,865 INFO L225 Difference]: With dead ends: 14257 [2022-12-14 11:40:36,865 INFO L226 Difference]: Without dead ends: 14257 [2022-12-14 11:40:36,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=288, Invalid=1194, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 11:40:36,866 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:40:36,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 4 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:40:36,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14257 states. [2022-12-14 11:40:37,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14257 to 13763. [2022-12-14 11:40:37,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13763 states, 13758 states have (on average 4.721035034161942) internal successors, (64952), 13762 states have internal predecessors, (64952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:37,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13763 states to 13763 states and 64952 transitions. [2022-12-14 11:40:37,124 INFO L78 Accepts]: Start accepts. Automaton has 13763 states and 64952 transitions. Word has length 24 [2022-12-14 11:40:37,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:40:37,124 INFO L495 AbstractCegarLoop]: Abstraction has 13763 states and 64952 transitions. [2022-12-14 11:40:37,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:37,125 INFO L276 IsEmpty]: Start isEmpty. Operand 13763 states and 64952 transitions. [2022-12-14 11:40:37,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:40:37,133 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:40:37,133 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:40:37,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (87)] Ended with exit code 0 [2022-12-14 11:40:37,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-12-14 11:40:37,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (88)] Ended with exit code 0 [2022-12-14 11:40:37,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:40:37,736 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:40:37,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:40:37,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1521823598, now seen corresponding path program 11 times [2022-12-14 11:40:37,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:40:37,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441559547] [2022-12-14 11:40:37,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:40:37,737 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 [2022-12-14 11:40:37,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:40:37,738 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:40:37,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (90)] Waiting until timeout for monitored process [2022-12-14 11:40:38,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:40:38,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:38,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 11:40:38,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:38,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:38,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:40:38,944 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:40:38,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441559547] [2022-12-14 11:40:38,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441559547] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:38,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1752161048] [2022-12-14 11:40:38,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:40:38,944 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:40:38,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:40:38,945 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:40:38,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (91)] Waiting until timeout for monitored process [2022-12-14 11:40:39,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:40:39,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:39,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:40:39,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:39,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:39,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:40,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1752161048] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:40,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900713880] [2022-12-14 11:40:40,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:40:40,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:40:40,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:40:40,315 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:40:40,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-12-14 11:40:40,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:40:40,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:40,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:40:40,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:41,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:40:41,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:40:41,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900713880] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:40:41,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-12-14 11:40:41,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11, 9, 8, 8] total 40 [2022-12-14 11:40:41,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204641020] [2022-12-14 11:40:41,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:40:41,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 11:40:41,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:40:41,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 11:40:41,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1288, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 11:40:41,142 INFO L87 Difference]: Start difference. First operand 13763 states and 64952 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:42,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:40:42,116 INFO L93 Difference]: Finished difference Result 14325 states and 66767 transitions. [2022-12-14 11:40:42,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:40:42,118 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 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 24 [2022-12-14 11:40:42,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:40:42,159 INFO L225 Difference]: With dead ends: 14325 [2022-12-14 11:40:42,159 INFO L226 Difference]: Without dead ends: 14325 [2022-12-14 11:40:42,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=307, Invalid=1415, Unknown=0, NotChecked=0, Total=1722 [2022-12-14 11:40:42,160 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:40:42,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 4 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 11:40:42,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14325 states. [2022-12-14 11:40:42,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14325 to 13779. [2022-12-14 11:40:42,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13779 states, 13774 states have (on average 4.719471467983157) internal successors, (65006), 13778 states have internal predecessors, (65006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:42,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13779 states to 13779 states and 65006 transitions. [2022-12-14 11:40:42,421 INFO L78 Accepts]: Start accepts. Automaton has 13779 states and 65006 transitions. Word has length 24 [2022-12-14 11:40:42,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:40:42,421 INFO L495 AbstractCegarLoop]: Abstraction has 13779 states and 65006 transitions. [2022-12-14 11:40:42,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:42,421 INFO L276 IsEmpty]: Start isEmpty. Operand 13779 states and 65006 transitions. [2022-12-14 11:40:42,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:40:42,430 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:40:42,430 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:40:42,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (90)] Forceful destruction successful, exit code 0 [2022-12-14 11:40:42,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-12-14 11:40:42,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (91)] Ended with exit code 0 [2022-12-14 11:40:43,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:40:43,033 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:40:43,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:40:43,034 INFO L85 PathProgramCache]: Analyzing trace with hash 2137221714, now seen corresponding path program 12 times [2022-12-14 11:40:43,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:40:43,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162503403] [2022-12-14 11:40:43,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 11:40:43,035 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 [2022-12-14 11:40:43,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:40:43,038 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:40:43,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (93)] Waiting until timeout for monitored process [2022-12-14 11:40:43,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-14 11:40:43,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:43,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:40:43,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:43,364 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:40:43,365 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 [2022-12-14 11:40:43,409 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 [2022-12-14 11:40:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:43,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:40:44,241 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:40:44,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162503403] [2022-12-14 11:40:44,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162503403] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:44,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [30308015] [2022-12-14 11:40:44,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 11:40:44,241 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:40:44,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:40:44,242 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:40:44,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (94)] Waiting until timeout for monitored process [2022-12-14 11:40:44,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-14 11:40:44,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:44,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:40:44,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:45,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:45,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [30308015] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:45,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295044426] [2022-12-14 11:40:45,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 11:40:45,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:40:45,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:40:45,747 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:40:45,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-12-14 11:40:45,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-14 11:40:45,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:45,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:40:45,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:40:46,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:40:46,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295044426] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:40:46,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-12-14 11:40:46,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 9, 8, 8] total 35 [2022-12-14 11:40:46,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799857097] [2022-12-14 11:40:46,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:40:46,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:40:46,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:40:46,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:40:46,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 11:40:46,342 INFO L87 Difference]: Start difference. First operand 13779 states and 65006 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:47,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:40:47,058 INFO L93 Difference]: Finished difference Result 14325 states and 66817 transitions. [2022-12-14 11:40:47,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:40:47,060 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 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 24 [2022-12-14 11:40:47,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:40:47,102 INFO L225 Difference]: With dead ends: 14325 [2022-12-14 11:40:47,102 INFO L226 Difference]: Without dead ends: 14325 [2022-12-14 11:40:47,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=268, Invalid=992, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 11:40:47,102 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 56 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:40:47,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 4 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:40:47,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14325 states. [2022-12-14 11:40:47,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14325 to 13803. [2022-12-14 11:40:47,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13803 states, 13798 states have (on average 4.71822003188868) internal successors, (65102), 13802 states have internal predecessors, (65102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:47,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13803 states to 13803 states and 65102 transitions. [2022-12-14 11:40:47,391 INFO L78 Accepts]: Start accepts. Automaton has 13803 states and 65102 transitions. Word has length 24 [2022-12-14 11:40:47,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:40:47,391 INFO L495 AbstractCegarLoop]: Abstraction has 13803 states and 65102 transitions. [2022-12-14 11:40:47,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:47,391 INFO L276 IsEmpty]: Start isEmpty. Operand 13803 states and 65102 transitions. [2022-12-14 11:40:47,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:40:47,400 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:40:47,400 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:40:47,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (94)] Ended with exit code 0 [2022-12-14 11:40:47,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-12-14 11:40:47,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (93)] Ended with exit code 0 [2022-12-14 11:40:48,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:40:48,003 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:40:48,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:40:48,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1598883796, now seen corresponding path program 13 times [2022-12-14 11:40:48,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:40:48,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159604328] [2022-12-14 11:40:48,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:40:48,007 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 [2022-12-14 11:40:48,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:40:48,008 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:40:48,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (96)] Waiting until timeout for monitored process [2022-12-14 11:40:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:40:48,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:40:48,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:48,281 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:40:48,282 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 [2022-12-14 11:40:48,334 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 13 treesize of output 9 [2022-12-14 11:40:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:48,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:49,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:40:49,197 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:40:49,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159604328] [2022-12-14 11:40:49,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159604328] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:49,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1505481460] [2022-12-14 11:40:49,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:40:49,197 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:40:49,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:40:49,198 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:40:49,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (97)] Waiting until timeout for monitored process [2022-12-14 11:40:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:40:49,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:40:49,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:49,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:49,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:40:50,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1505481460] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:40:50,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733970360] [2022-12-14 11:40:50,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:40:50,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:40:50,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:40:50,407 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:40:50,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-12-14 11:40:50,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:40:50,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:40:50,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:40:51,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:40:51,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733970360] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:40:51,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-12-14 11:40:51,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9, 8, 8] total 39 [2022-12-14 11:40:51,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790488199] [2022-12-14 11:40:51,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:40:51,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 11:40:51,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:40:51,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 11:40:51,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1177, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 11:40:51,161 INFO L87 Difference]: Start difference. First operand 13803 states and 65102 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:52,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:40:52,044 INFO L93 Difference]: Finished difference Result 14393 states and 66997 transitions. [2022-12-14 11:40:52,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:40:52,046 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 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 24 [2022-12-14 11:40:52,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:40:52,087 INFO L225 Difference]: With dead ends: 14393 [2022-12-14 11:40:52,088 INFO L226 Difference]: Without dead ends: 14393 [2022-12-14 11:40:52,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=328, Invalid=1232, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 11:40:52,088 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 64 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:40:52,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 4 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 11:40:52,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14393 states. [2022-12-14 11:40:52,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14393 to 13791. [2022-12-14 11:40:52,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13791 states, 13786 states have (on average 4.720150877702016) internal successors, (65072), 13790 states have internal predecessors, (65072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:52,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13791 states to 13791 states and 65072 transitions. [2022-12-14 11:40:52,372 INFO L78 Accepts]: Start accepts. Automaton has 13791 states and 65072 transitions. Word has length 24 [2022-12-14 11:40:52,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:40:52,372 INFO L495 AbstractCegarLoop]: Abstraction has 13791 states and 65072 transitions. [2022-12-14 11:40:52,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:52,373 INFO L276 IsEmpty]: Start isEmpty. Operand 13791 states and 65072 transitions. [2022-12-14 11:40:52,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:40:52,381 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:40:52,381 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:40:52,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-12-14 11:40:52,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (97)] Ended with exit code 0 [2022-12-14 11:40:52,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (96)] Ended with exit code 0 [2022-12-14 11:40:52,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:40:52,983 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:40:52,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:40:52,985 INFO L85 PathProgramCache]: Analyzing trace with hash 880599634, now seen corresponding path program 14 times [2022-12-14 11:40:52,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:40:52,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618044518] [2022-12-14 11:40:52,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:40:52,987 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 [2022-12-14 11:40:52,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:40:52,987 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:40:52,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (99)] Waiting until timeout for monitored process [2022-12-14 11:40:53,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:40:53,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:53,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:40:53,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:53,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:40:53,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:40:53,928 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:40:53,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618044518] [2022-12-14 11:40:53,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618044518] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 11:40:53,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:40:53,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2022-12-14 11:40:53,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752866101] [2022-12-14 11:40:53,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:40:53,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:40:53,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:40:53,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:40:53,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-12-14 11:40:53,929 INFO L87 Difference]: Start difference. First operand 13791 states and 65072 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:55,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:40:55,116 INFO L93 Difference]: Finished difference Result 15671 states and 72110 transitions. [2022-12-14 11:40:55,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:40:55,118 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 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 24 [2022-12-14 11:40:55,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:40:55,163 INFO L225 Difference]: With dead ends: 15671 [2022-12-14 11:40:55,163 INFO L226 Difference]: Without dead ends: 15671 [2022-12-14 11:40:55,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2022-12-14 11:40:55,164 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 98 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:40:55,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 7 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 11:40:55,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15671 states. [2022-12-14 11:40:55,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15671 to 13779. [2022-12-14 11:40:55,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13779 states, 13774 states have (on average 4.719471467983157) internal successors, (65006), 13778 states have internal predecessors, (65006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:55,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13779 states to 13779 states and 65006 transitions. [2022-12-14 11:40:55,442 INFO L78 Accepts]: Start accepts. Automaton has 13779 states and 65006 transitions. Word has length 24 [2022-12-14 11:40:55,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:40:55,442 INFO L495 AbstractCegarLoop]: Abstraction has 13779 states and 65006 transitions. [2022-12-14 11:40:55,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:55,443 INFO L276 IsEmpty]: Start isEmpty. Operand 13779 states and 65006 transitions. [2022-12-14 11:40:55,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:40:55,451 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:40:55,451 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:40:55,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (99)] Ended with exit code 0 [2022-12-14 11:40:55,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:40:55,653 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:40:55,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:40:55,653 INFO L85 PathProgramCache]: Analyzing trace with hash 2043260888, now seen corresponding path program 15 times [2022-12-14 11:40:55,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:40:55,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045333287] [2022-12-14 11:40:55,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:40:55,655 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 [2022-12-14 11:40:55,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:40:55,658 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:40:55,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (100)] Waiting until timeout for monitored process [2022-12-14 11:40:55,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 11:40:55,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:55,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:40:55,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:40:56,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:40:56,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:40:56,371 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:40:56,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045333287] [2022-12-14 11:40:56,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045333287] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 11:40:56,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:40:56,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2022-12-14 11:40:56,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255357317] [2022-12-14 11:40:56,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:40:56,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:40:56,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:40:56,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:40:56,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-12-14 11:40:56,372 INFO L87 Difference]: Start difference. First operand 13779 states and 65006 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:58,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:40:58,196 INFO L93 Difference]: Finished difference Result 24079 states and 111496 transitions. [2022-12-14 11:40:58,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 11:40:58,199 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 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 24 [2022-12-14 11:40:58,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:40:58,275 INFO L225 Difference]: With dead ends: 24079 [2022-12-14 11:40:58,275 INFO L226 Difference]: Without dead ends: 24079 [2022-12-14 11:40:58,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2022-12-14 11:40:58,276 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 109 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:40:58,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 17 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 11:40:58,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24079 states. [2022-12-14 11:40:58,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24079 to 13791. [2022-12-14 11:40:58,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13791 states, 13786 states have (on average 4.719280429421152) internal successors, (65060), 13790 states have internal predecessors, (65060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:58,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13791 states to 13791 states and 65060 transitions. [2022-12-14 11:40:58,628 INFO L78 Accepts]: Start accepts. Automaton has 13791 states and 65060 transitions. Word has length 24 [2022-12-14 11:40:58,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:40:58,628 INFO L495 AbstractCegarLoop]: Abstraction has 13791 states and 65060 transitions. [2022-12-14 11:40:58,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:40:58,628 INFO L276 IsEmpty]: Start isEmpty. Operand 13791 states and 65060 transitions. [2022-12-14 11:40:58,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:40:58,637 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:40:58,637 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:40:58,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (100)] Ended with exit code 0 [2022-12-14 11:40:58,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:40:58,838 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:40:58,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:40:58,839 INFO L85 PathProgramCache]: Analyzing trace with hash 905657730, now seen corresponding path program 16 times [2022-12-14 11:40:58,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:40:58,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053458404] [2022-12-14 11:40:58,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:40:58,841 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 [2022-12-14 11:40:58,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:40:58,844 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:40:58,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (101)] Waiting until timeout for monitored process [2022-12-14 11:40:59,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:40:59,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:40:59,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:40:59,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:40:59,175 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:40:59,176 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 [2022-12-14 11:40:59,236 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 13 treesize of output 9 [2022-12-14 11:40:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:40:59,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:41:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:41:00,050 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:41:00,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053458404] [2022-12-14 11:41:00,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053458404] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:41:00,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [980944844] [2022-12-14 11:41:00,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:41:00,050 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:41:00,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:41:00,051 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:41:00,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (102)] Waiting until timeout for monitored process [2022-12-14 11:41:00,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:41:00,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:41:00,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:41:00,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:41:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:41:00,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:41:01,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:41:01,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [980944844] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:41:01,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926595530] [2022-12-14 11:41:01,347 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:41:01,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:41:01,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:41:01,348 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:41:01,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-12-14 11:41:01,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:41:01,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:41:01,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:41:01,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:41:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:41:01,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:41:01,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926595530] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:41:01,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-12-14 11:41:01,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 9, 8, 8] total 37 [2022-12-14 11:41:01,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16060831] [2022-12-14 11:41:01,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:41:01,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:41:01,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:41:01,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:41:01,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1099, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 11:41:01,993 INFO L87 Difference]: Start difference. First operand 13791 states and 65060 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:02,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:41:02,738 INFO L93 Difference]: Finished difference Result 14741 states and 68687 transitions. [2022-12-14 11:41:02,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:41:02,741 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 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 24 [2022-12-14 11:41:02,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:41:02,809 INFO L225 Difference]: With dead ends: 14741 [2022-12-14 11:41:02,809 INFO L226 Difference]: Without dead ends: 14731 [2022-12-14 11:41:02,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=258, Invalid=1224, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 11:41:02,810 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 57 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:41:02,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 9 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:41:02,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14731 states. [2022-12-14 11:41:03,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14731 to 13815. [2022-12-14 11:41:03,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13815 states, 13810 states have (on average 4.718030412744388) internal successors, (65156), 13814 states have internal predecessors, (65156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:03,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13815 states to 13815 states and 65156 transitions. [2022-12-14 11:41:03,083 INFO L78 Accepts]: Start accepts. Automaton has 13815 states and 65156 transitions. Word has length 24 [2022-12-14 11:41:03,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:41:03,084 INFO L495 AbstractCegarLoop]: Abstraction has 13815 states and 65156 transitions. [2022-12-14 11:41:03,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:03,084 INFO L276 IsEmpty]: Start isEmpty. Operand 13815 states and 65156 transitions. [2022-12-14 11:41:03,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:41:03,092 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:41:03,092 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:41:03,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (101)] Ended with exit code 0 [2022-12-14 11:41:03,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (102)] Ended with exit code 0 [2022-12-14 11:41:03,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-12-14 11:41:03,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:41:03,695 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:41:03,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:41:03,696 INFO L85 PathProgramCache]: Analyzing trace with hash 236513352, now seen corresponding path program 17 times [2022-12-14 11:41:03,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:41:03,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859230981] [2022-12-14 11:41:03,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:41:03,696 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 [2022-12-14 11:41:03,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:41:03,697 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:41:03,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (104)] Waiting until timeout for monitored process [2022-12-14 11:41:03,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:41:03,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:41:03,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 11:41:03,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:41:04,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:41:04,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:41:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:41:04,786 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:41:04,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859230981] [2022-12-14 11:41:04,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859230981] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:41:04,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1914457419] [2022-12-14 11:41:04,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:41:04,787 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:41:04,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:41:04,788 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:41:04,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (105)] Waiting until timeout for monitored process [2022-12-14 11:41:05,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:41:05,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:41:05,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:41:05,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:41:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:41:05,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:41:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:41:05,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1914457419] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:41:05,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395342442] [2022-12-14 11:41:05,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:41:05,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:41:05,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:41:05,982 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:41:05,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-12-14 11:41:06,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:41:06,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:41:06,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:41:06,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:41:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:41:06,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:41:06,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395342442] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:41:06,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-12-14 11:41:06,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 9, 8, 8] total 37 [2022-12-14 11:41:06,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099245119] [2022-12-14 11:41:06,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:41:06,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:41:06,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:41:06,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:41:06,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 11:41:06,657 INFO L87 Difference]: Start difference. First operand 13815 states and 65156 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:07,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:41:07,629 INFO L93 Difference]: Finished difference Result 14767 states and 68760 transitions. [2022-12-14 11:41:07,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:41:07,631 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 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 24 [2022-12-14 11:41:07,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:41:07,676 INFO L225 Difference]: With dead ends: 14767 [2022-12-14 11:41:07,676 INFO L226 Difference]: Without dead ends: 14767 [2022-12-14 11:41:07,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=282, Invalid=1200, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 11:41:07,677 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 54 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:41:07,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 7 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 11:41:07,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14767 states. [2022-12-14 11:41:07,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14767 to 13827. [2022-12-14 11:41:07,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13827 states, 13822 states have (on average 4.716104760526696) internal successors, (65186), 13826 states have internal predecessors, (65186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:07,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13827 states to 13827 states and 65186 transitions. [2022-12-14 11:41:07,967 INFO L78 Accepts]: Start accepts. Automaton has 13827 states and 65186 transitions. Word has length 24 [2022-12-14 11:41:07,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:41:07,968 INFO L495 AbstractCegarLoop]: Abstraction has 13827 states and 65186 transitions. [2022-12-14 11:41:07,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:07,968 INFO L276 IsEmpty]: Start isEmpty. Operand 13827 states and 65186 transitions. [2022-12-14 11:41:07,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:41:07,977 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:41:07,977 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:41:07,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (105)] Ended with exit code 0 [2022-12-14 11:41:08,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (104)] Ended with exit code 0 [2022-12-14 11:41:08,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-12-14 11:41:08,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:41:08,579 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:41:08,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:41:08,581 INFO L85 PathProgramCache]: Analyzing trace with hash 795375138, now seen corresponding path program 18 times [2022-12-14 11:41:08,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:41:08,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [739157967] [2022-12-14 11:41:08,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 11:41:08,583 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 [2022-12-14 11:41:08,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:41:08,584 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:41:08,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (107)] Waiting until timeout for monitored process [2022-12-14 11:41:08,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-14 11:41:08,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:41:08,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:41:08,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:41:09,038 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:41:09,038 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 [2022-12-14 11:41:09,105 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 13 treesize of output 9 [2022-12-14 11:41:09,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:41:09,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:41:10,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:41:10,078 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:41:10,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [739157967] [2022-12-14 11:41:10,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [739157967] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:41:10,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2097090158] [2022-12-14 11:41:10,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 11:41:10,078 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:41:10,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:41:10,079 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:41:10,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (108)] Waiting until timeout for monitored process [2022-12-14 11:41:10,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-14 11:41:10,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:41:10,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:41:10,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:41:10,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:41:10,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:41:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:41:11,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2097090158] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:41:11,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015737118] [2022-12-14 11:41:11,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-14 11:41:11,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:41:11,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:41:11,467 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:41:11,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-12-14 11:41:11,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-14 11:41:11,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:41:11,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:41:11,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:41:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:41:12,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:41:12,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015737118] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:41:12,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-12-14 11:41:12,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9, 8, 8] total 37 [2022-12-14 11:41:12,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651920498] [2022-12-14 11:41:12,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:41:12,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 11:41:12,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:41:12,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 11:41:12,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1065, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 11:41:12,228 INFO L87 Difference]: Start difference. First operand 13827 states and 65186 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:13,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:41:13,167 INFO L93 Difference]: Finished difference Result 14835 states and 68940 transitions. [2022-12-14 11:41:13,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:41:13,169 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 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 24 [2022-12-14 11:41:13,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:41:13,210 INFO L225 Difference]: With dead ends: 14835 [2022-12-14 11:41:13,210 INFO L226 Difference]: Without dead ends: 14835 [2022-12-14 11:41:13,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=301, Invalid=1181, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 11:41:13,210 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 61 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:41:13,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 6 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 11:41:13,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14835 states. [2022-12-14 11:41:13,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14835 to 13803. [2022-12-14 11:41:13,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13803 states, 13798 states have (on average 4.719959414407885) internal successors, (65126), 13802 states have internal predecessors, (65126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:13,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13803 states to 13803 states and 65126 transitions. [2022-12-14 11:41:13,522 INFO L78 Accepts]: Start accepts. Automaton has 13803 states and 65126 transitions. Word has length 24 [2022-12-14 11:41:13,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:41:13,522 INFO L495 AbstractCegarLoop]: Abstraction has 13803 states and 65126 transitions. [2022-12-14 11:41:13,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:13,523 INFO L276 IsEmpty]: Start isEmpty. Operand 13803 states and 65126 transitions. [2022-12-14 11:41:13,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:41:13,530 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:41:13,530 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:41:13,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (107)] Forceful destruction successful, exit code 0 [2022-12-14 11:41:13,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-12-14 11:41:13,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (108)] Ended with exit code 0 [2022-12-14 11:41:14,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:41:14,133 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:41:14,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:41:14,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1410773254, now seen corresponding path program 19 times [2022-12-14 11:41:14,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:41:14,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [369078511] [2022-12-14 11:41:14,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:41:14,136 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 [2022-12-14 11:41:14,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:41:14,137 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:41:14,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (110)] Waiting until timeout for monitored process [2022-12-14 11:41:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:41:14,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:41:14,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:41:14,563 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:41:14,563 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 [2022-12-14 11:41:14,612 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 13 treesize of output 9 [2022-12-14 11:41:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:41:14,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:41:15,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:41:15,386 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:41:15,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [369078511] [2022-12-14 11:41:15,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [369078511] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:41:15,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [52119614] [2022-12-14 11:41:15,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:41:15,386 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:41:15,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:41:15,387 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:41:15,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (111)] Waiting until timeout for monitored process [2022-12-14 11:41:15,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:41:15,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:41:15,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:41:16,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:41:16,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:41:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:41:16,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [52119614] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:41:16,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018482823] [2022-12-14 11:41:16,544 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 11:41:16,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:41:16,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:41:16,545 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:41:16,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-12-14 11:41:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:41:16,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:41:16,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:41:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:41:17,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:41:17,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018482823] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:41:17,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-12-14 11:41:17,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 9, 8, 8] total 37 [2022-12-14 11:41:17,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073952199] [2022-12-14 11:41:17,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:41:17,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:41:17,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:41:17,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:41:17,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1074, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 11:41:17,259 INFO L87 Difference]: Start difference. First operand 13803 states and 65126 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:18,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:41:18,144 INFO L93 Difference]: Finished difference Result 14739 states and 68688 transitions. [2022-12-14 11:41:18,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:41:18,146 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 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 24 [2022-12-14 11:41:18,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:41:18,188 INFO L225 Difference]: With dead ends: 14739 [2022-12-14 11:41:18,188 INFO L226 Difference]: Without dead ends: 14739 [2022-12-14 11:41:18,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=280, Invalid=1126, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 11:41:18,188 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 55 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:41:18,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 6 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 11:41:18,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14739 states. [2022-12-14 11:41:18,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14739 to 13827. [2022-12-14 11:41:18,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13827 states, 13822 states have (on average 4.718709304008103) internal successors, (65222), 13826 states have internal predecessors, (65222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:18,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13827 states to 13827 states and 65222 transitions. [2022-12-14 11:41:18,450 INFO L78 Accepts]: Start accepts. Automaton has 13827 states and 65222 transitions. Word has length 24 [2022-12-14 11:41:18,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:41:18,451 INFO L495 AbstractCegarLoop]: Abstraction has 13827 states and 65222 transitions. [2022-12-14 11:41:18,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:18,451 INFO L276 IsEmpty]: Start isEmpty. Operand 13827 states and 65222 transitions. [2022-12-14 11:41:18,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:41:18,459 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:41:18,459 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:41:18,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (110)] Ended with exit code 0 [2022-12-14 11:41:18,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-12-14 11:41:18,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (111)] Ended with exit code 0 [2022-12-14 11:41:19,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:41:19,062 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:41:19,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:41:19,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1969635040, now seen corresponding path program 20 times [2022-12-14 11:41:19,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:41:19,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [695174844] [2022-12-14 11:41:19,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:41:19,064 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 [2022-12-14 11:41:19,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:41:19,065 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:41:19,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (113)] Waiting until timeout for monitored process [2022-12-14 11:41:19,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:41:19,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:41:19,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:41:19,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:41:19,416 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:41:19,416 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 [2022-12-14 11:41:19,476 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 13 treesize of output 9 [2022-12-14 11:41:19,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:41:19,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:41:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:41:20,428 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:41:20,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [695174844] [2022-12-14 11:41:20,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [695174844] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:41:20,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2095395230] [2022-12-14 11:41:20,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:41:20,428 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:41:20,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:41:20,429 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:41:20,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (114)] Waiting until timeout for monitored process [2022-12-14 11:41:20,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:41:20,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:41:20,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:41:20,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:41:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:41:21,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:41:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:41:21,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2095395230] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:41:21,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246573578] [2022-12-14 11:41:21,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:41:21,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:41:21,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:41:21,832 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:41:21,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-12-14 11:41:22,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:41:22,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:41:22,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:41:22,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:41:22,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:41:22,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:41:22,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246573578] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:41:22,661 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-12-14 11:41:22,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9, 8, 8] total 37 [2022-12-14 11:41:22,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238414100] [2022-12-14 11:41:22,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:41:22,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 11:41:22,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:41:22,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 11:41:22,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1053, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 11:41:22,662 INFO L87 Difference]: Start difference. First operand 13827 states and 65222 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:23,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:41:23,454 INFO L93 Difference]: Finished difference Result 14807 states and 68868 transitions. [2022-12-14 11:41:23,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:41:23,456 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 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 24 [2022-12-14 11:41:23,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:41:23,501 INFO L225 Difference]: With dead ends: 14807 [2022-12-14 11:41:23,501 INFO L226 Difference]: Without dead ends: 14807 [2022-12-14 11:41:23,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=301, Invalid=1105, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 11:41:23,502 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 62 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 11:41:23,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 6 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 11:41:23,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14807 states. [2022-12-14 11:41:23,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14807 to 13815. [2022-12-14 11:41:23,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13815 states, 13810 states have (on average 4.720637219406227) internal successors, (65192), 13814 states have internal predecessors, (65192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:23,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13815 states to 13815 states and 65192 transitions. [2022-12-14 11:41:23,783 INFO L78 Accepts]: Start accepts. Automaton has 13815 states and 65192 transitions. Word has length 24 [2022-12-14 11:41:23,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:41:23,783 INFO L495 AbstractCegarLoop]: Abstraction has 13815 states and 65192 transitions. [2022-12-14 11:41:23,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:23,783 INFO L276 IsEmpty]: Start isEmpty. Operand 13815 states and 65192 transitions. [2022-12-14 11:41:23,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:41:23,792 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:41:23,792 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:41:23,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (114)] Ended with exit code 0 [2022-12-14 11:41:24,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-12-14 11:41:24,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (113)] Ended with exit code 0 [2022-12-14 11:41:24,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:41:24,395 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:41:24,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:41:24,396 INFO L85 PathProgramCache]: Analyzing trace with hash 154151174, now seen corresponding path program 21 times [2022-12-14 11:41:24,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:41:24,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1993789132] [2022-12-14 11:41:24,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 11:41:24,396 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 [2022-12-14 11:41:24,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:41:24,397 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:41:24,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (116)] Waiting until timeout for monitored process [2022-12-14 11:41:24,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 11:41:24,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:41:24,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:41:24,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:41:24,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:41:24,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:41:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:41:25,242 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:41:25,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1993789132] [2022-12-14 11:41:25,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1993789132] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 11:41:25,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:41:25,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2022-12-14 11:41:25,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238532873] [2022-12-14 11:41:25,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:41:25,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:41:25,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:41:25,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:41:25,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-12-14 11:41:25,243 INFO L87 Difference]: Start difference. First operand 13815 states and 65192 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:26,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:41:26,714 INFO L93 Difference]: Finished difference Result 16635 states and 75666 transitions. [2022-12-14 11:41:26,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 11:41:26,716 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 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 24 [2022-12-14 11:41:26,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:41:26,763 INFO L225 Difference]: With dead ends: 16635 [2022-12-14 11:41:26,763 INFO L226 Difference]: Without dead ends: 16635 [2022-12-14 11:41:26,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-12-14 11:41:26,763 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 100 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:41:26,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 10 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 11:41:26,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16635 states. [2022-12-14 11:41:26,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16635 to 13791. [2022-12-14 11:41:27,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13791 states, 13786 states have (on average 4.719280429421152) internal successors, (65060), 13790 states have internal predecessors, (65060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:27,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13791 states to 13791 states and 65060 transitions. [2022-12-14 11:41:27,056 INFO L78 Accepts]: Start accepts. Automaton has 13791 states and 65060 transitions. Word has length 24 [2022-12-14 11:41:27,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:41:27,056 INFO L495 AbstractCegarLoop]: Abstraction has 13791 states and 65060 transitions. [2022-12-14 11:41:27,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:27,056 INFO L276 IsEmpty]: Start isEmpty. Operand 13791 states and 65060 transitions. [2022-12-14 11:41:27,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:41:27,065 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:41:27,065 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:41:27,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (116)] Forceful destruction successful, exit code 0 [2022-12-14 11:41:27,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 [2022-12-14 11:41:27,266 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:41:27,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:41:27,268 INFO L85 PathProgramCache]: Analyzing trace with hash -249114526, now seen corresponding path program 22 times [2022-12-14 11:41:27,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:41:27,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [199139093] [2022-12-14 11:41:27,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:41:27,269 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 [2022-12-14 11:41:27,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:41:27,272 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:41:27,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (117)] Waiting until timeout for monitored process [2022-12-14 11:41:27,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:41:27,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:41:27,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:41:27,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:41:28,026 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:41:28,026 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 17 treesize of output 44 [2022-12-14 11:41:28,080 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 [2022-12-14 11:41:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:41:28,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:41:28,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:41:28,857 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:41:28,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [199139093] [2022-12-14 11:41:28,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [199139093] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:41:28,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [763428559] [2022-12-14 11:41:28,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:41:28,858 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:41:28,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:41:28,859 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:41:28,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (118)] Waiting until timeout for monitored process [2022-12-14 11:41:29,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:41:29,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:41:29,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:41:29,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:41:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:41:29,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:41:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:41:29,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [763428559] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:41:29,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030845264] [2022-12-14 11:41:29,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:41:29,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:41:29,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:41:29,891 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:41:29,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-12-14 11:41:30,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:41:30,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:41:30,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:41:30,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:41:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:41:30,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:41:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:41:30,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030845264] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:41:30,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:41:30,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8, 8, 10, 9] total 35 [2022-12-14 11:41:30,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434460039] [2022-12-14 11:41:30,632 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:41:30,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 11:41:30,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:41:30,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 11:41:30,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=940, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 11:41:30,633 INFO L87 Difference]: Start difference. First operand 13791 states and 65060 transitions. Second operand has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 35 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:39,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:41:39,358 INFO L93 Difference]: Finished difference Result 20517 states and 92550 transitions. [2022-12-14 11:41:39,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-14 11:41:39,360 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 35 states have internal predecessors, (82), 0 states have call successors, (0), 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 24 [2022-12-14 11:41:39,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:41:39,419 INFO L225 Difference]: With dead ends: 20517 [2022-12-14 11:41:39,419 INFO L226 Difference]: Without dead ends: 20517 [2022-12-14 11:41:39,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1529, Invalid=4171, Unknown=0, NotChecked=0, Total=5700 [2022-12-14 11:41:39,420 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 751 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2716 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 751 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 2757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-12-14 11:41:39,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [751 Valid, 86 Invalid, 2757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2716 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-12-14 11:41:39,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20517 states. [2022-12-14 11:41:39,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20517 to 13701. [2022-12-14 11:41:39,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13701 states, 13696 states have (on average 4.715318341121495) internal successors, (64581), 13700 states have internal predecessors, (64581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:39,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13701 states to 13701 states and 64581 transitions. [2022-12-14 11:41:39,742 INFO L78 Accepts]: Start accepts. Automaton has 13701 states and 64581 transitions. Word has length 24 [2022-12-14 11:41:39,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:41:39,743 INFO L495 AbstractCegarLoop]: Abstraction has 13701 states and 64581 transitions. [2022-12-14 11:41:39,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.342857142857143) internal successors, (82), 35 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:39,743 INFO L276 IsEmpty]: Start isEmpty. Operand 13701 states and 64581 transitions. [2022-12-14 11:41:39,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:41:39,751 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:41:39,751 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:41:39,757 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-12-14 11:41:39,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (117)] Ended with exit code 0 [2022-12-14 11:41:40,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (118)] Ended with exit code 0 [2022-12-14 11:41:40,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:41:40,354 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:41:40,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:41:40,355 INFO L85 PathProgramCache]: Analyzing trace with hash -476344754, now seen corresponding path program 23 times [2022-12-14 11:41:40,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:41:40,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578800797] [2022-12-14 11:41:40,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:41:40,356 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 [2022-12-14 11:41:40,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:41:40,359 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:41:40,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (120)] Waiting until timeout for monitored process [2022-12-14 11:41:40,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:41:40,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:41:40,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 11:41:40,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:41:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:41:41,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:41:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:41:41,505 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:41:41,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578800797] [2022-12-14 11:41:41,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578800797] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:41:41,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [48445654] [2022-12-14 11:41:41,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:41:41,506 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:41:41,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:41:41,507 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:41:41,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (121)] Waiting until timeout for monitored process [2022-12-14 11:41:41,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:41:41,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:41:41,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:41:41,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:41:42,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:41:42,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:41:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 11:41:42,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [48445654] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:41:42,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451416048] [2022-12-14 11:41:42,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 11:41:42,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:41:42,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:41:42,576 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:41:42,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-12-14 11:41:42,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:41:42,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:41:42,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:41:42,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:41:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:41:43,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:41:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 11:41:43,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451416048] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:41:43,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:41:43,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8, 8, 10, 9] total 36 [2022-12-14 11:41:43,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533827869] [2022-12-14 11:41:43,244 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:41:43,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 11:41:43,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:41:43,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 11:41:43,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 11:41:43,244 INFO L87 Difference]: Start difference. First operand 13701 states and 64581 transitions. Second operand has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:54,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:41:54,947 INFO L93 Difference]: Finished difference Result 29331 states and 132813 transitions. [2022-12-14 11:41:54,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-12-14 11:41:54,950 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 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 24 [2022-12-14 11:41:54,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:41:55,072 INFO L225 Difference]: With dead ends: 29331 [2022-12-14 11:41:55,072 INFO L226 Difference]: Without dead ends: 29331 [2022-12-14 11:41:55,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2214 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1892, Invalid=6298, Unknown=0, NotChecked=0, Total=8190 [2022-12-14 11:41:55,073 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 817 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 4021 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 4059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 4021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-12-14 11:41:55,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [817 Valid, 194 Invalid, 4059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 4021 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-12-14 11:41:55,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29331 states. [2022-12-14 11:41:55,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29331 to 13365. [2022-12-14 11:41:55,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13365 states, 13360 states have (on average 4.69940119760479) internal successors, (62784), 13364 states have internal predecessors, (62784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:55,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13365 states to 13365 states and 62784 transitions. [2022-12-14 11:41:55,440 INFO L78 Accepts]: Start accepts. Automaton has 13365 states and 62784 transitions. Word has length 24 [2022-12-14 11:41:55,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:41:55,441 INFO L495 AbstractCegarLoop]: Abstraction has 13365 states and 62784 transitions. [2022-12-14 11:41:55,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 36 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:41:55,441 INFO L276 IsEmpty]: Start isEmpty. Operand 13365 states and 62784 transitions. [2022-12-14 11:41:55,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 11:41:55,450 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:41:55,450 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1] [2022-12-14 11:41:55,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (120)] Ended with exit code 0 [2022-12-14 11:41:55,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (121)] Ended with exit code 0 [2022-12-14 11:41:55,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-12-14 11:41:56,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:41:56,052 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-12-14 11:41:56,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:41:56,054 INFO L85 PathProgramCache]: Analyzing trace with hash 925154639, now seen corresponding path program 4 times [2022-12-14 11:41:56,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:41:56,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723400631] [2022-12-14 11:41:56,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:41:56,056 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 [2022-12-14 11:41:56,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:41:56,059 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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) [2022-12-14 11:41:56,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/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 (123)] Waiting until timeout for monitored process [2022-12-14 11:41:56,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:41:56,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:41:56,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 11:41:56,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:41:56,452 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:41:56,453 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 [2022-12-14 11:41:57,351 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:41:57,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:42:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:42:07,643 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:42:07,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1723400631] [2022-12-14 11:42:07,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1723400631] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:42:07,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1126689274] [2022-12-14 11:42:07,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:42:07,643 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:42:07,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:42:07,644 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:42:07,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (124)] Waiting until timeout for monitored process [2022-12-14 11:42:08,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:42:08,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:42:08,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-14 11:42:08,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:42:08,289 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:42:08,289 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 [2022-12-14 11:42:09,702 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:42:09,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:42:11,415 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:42:11,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1126689274] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:42:11,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859332184] [2022-12-14 11:42:11,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 11:42:11,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:42:11,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:42:11,416 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:42:11,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fae2cb0b-5719-4afa-ab68-0566e4e7ffe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-12-14 11:42:11,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 11:42:11,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:42:11,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 11:42:11,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:42:11,814 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:42:11,814 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 [2022-12-14 11:42:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:42:12,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:42:13,125 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:42:13,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859332184] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:42:13,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:42:13,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23, 23, 23, 23] total 62 [2022-12-14 11:42:13,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031454759] [2022-12-14 11:42:13,125 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:42:13,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-14 11:42:13,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:42:13,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-14 11:42:13,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=2979, Unknown=0, NotChecked=0, Total=4032 [2022-12-14 11:42:13,127 INFO L87 Difference]: Start difference. First operand 13365 states and 62784 transitions. Second operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 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) [2022-12-14 11:42:39,484 WARN L233 SmtUtils]: Spent 13.63s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:42:54,282 WARN L233 SmtUtils]: Spent 13.03s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:43:26,642 WARN L233 SmtUtils]: Spent 30.55s on a formula simplification. DAG size of input: 254 DAG size of output: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:43:40,428 WARN L233 SmtUtils]: Spent 12.73s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:44:07,321 WARN L233 SmtUtils]: Spent 25.03s on a formula simplification. DAG size of input: 246 DAG size of output: 246 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:44:20,538 WARN L233 SmtUtils]: Spent 12.20s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:44:42,914 WARN L233 SmtUtils]: Spent 20.47s on a formula simplification. DAG size of input: 236 DAG size of output: 236 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)