./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur --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 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 --- 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-38b53e6 [2022-11-25 23:40:25,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:40:25,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:40:25,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:40:25,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:40:25,907 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:40:25,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:40:25,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:40:25,913 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:40:25,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:40:25,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:40:25,916 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:40:25,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:40:25,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:40:25,918 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:40:25,920 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:40:25,920 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:40:25,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:40:25,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:40:25,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:40:25,937 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:40:25,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:40:25,944 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:40:25,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:40:25,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:40:25,956 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:40:25,957 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:40:25,958 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:40:25,958 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:40:25,959 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:40:25,959 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:40:25,960 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:40:25,961 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:40:25,962 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:40:25,963 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:40:25,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:40:25,964 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:40:25,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:40:25,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:40:25,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:40:25,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:40:25,970 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-25 23:40:26,008 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:40:26,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:40:26,008 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:40:26,008 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:40:26,009 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:40:26,009 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:40:26,010 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:40:26,010 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:40:26,010 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:40:26,010 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:40:26,010 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:40:26,010 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:40:26,011 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:40:26,011 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:40:26,011 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:40:26,011 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:40:26,012 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:40:26,012 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:40:26,012 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 23:40:26,013 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 23:40:26,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:40:26,013 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:40:26,013 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 23:40:26,013 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:40:26,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:40:26,019 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:40:26,019 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 23:40:26,019 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 23:40:26,019 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 23:40:26,020 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:40:26,020 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 23:40:26,020 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:40:26,020 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:40:26,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:40:26,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:40:26,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:40:26,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:40:26,022 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:40:26,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:40:26,022 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:40:26,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:40:26,023 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:40:26,023 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_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 [2022-11-25 23:40:26,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:40:26,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:40:26,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:40:26,363 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:40:26,363 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:40:26,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-11-25 23:40:29,362 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:40:29,579 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:40:29,579 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-11-25 23:40:29,590 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/data/642d87997/51836100c7e248bf9e19781fa26cce7e/FLAG3d78601a5 [2022-11-25 23:40:29,610 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/data/642d87997/51836100c7e248bf9e19781fa26cce7e [2022-11-25 23:40:29,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:40:29,615 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:40:29,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:40:29,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:40:29,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:40:29,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:40:29" (1/1) ... [2022-11-25 23:40:29,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@195abdaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:40:29, skipping insertion in model container [2022-11-25 23:40:29,629 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:40:29" (1/1) ... [2022-11-25 23:40:29,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:40:29,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:40:29,871 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:40:29,876 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:40:29,881 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:40:29,883 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:40:29,885 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:40:29,887 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:40:29,900 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_9f3848f1-9c0a-4f74-b35a-956954ea12fb/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-11-25 23:40:29,912 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:40:29,923 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-25 23:40:29,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7846dc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:40:29, skipping insertion in model container [2022-11-25 23:40:29,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:40:29,924 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-25 23:40:29,926 INFO L158 Benchmark]: Toolchain (without parser) took 309.92ms. Allocated memory is still 163.6MB. Free memory was 124.8MB in the beginning and 114.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 23:40:29,927 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 121.6MB. Free memory is still 95.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:40:29,927 INFO L158 Benchmark]: CACSL2BoogieTranslator took 302.95ms. Allocated memory is still 163.6MB. Free memory was 124.8MB in the beginning and 114.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 23:40:29,929 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 121.6MB. Free memory is still 95.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 302.95ms. Allocated memory is still 163.6MB. Free memory was 124.8MB in the beginning and 114.7MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 109]: 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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur --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 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 --- 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-38b53e6 [2022-11-25 23:40:32,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:40:32,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:40:32,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:40:32,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:40:32,329 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:40:32,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:40:32,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:40:32,337 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:40:32,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:40:32,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:40:32,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:40:32,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:40:32,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:40:32,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:40:32,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:40:32,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:40:32,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:40:32,365 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:40:32,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:40:32,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:40:32,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:40:32,378 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:40:32,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:40:32,384 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:40:32,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:40:32,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:40:32,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:40:32,393 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:40:32,394 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:40:32,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:40:32,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:40:32,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:40:32,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:40:32,411 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:40:32,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:40:32,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:40:32,413 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:40:32,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:40:32,415 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:40:32,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:40:32,419 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-25 23:40:32,457 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:40:32,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:40:32,459 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:40:32,459 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:40:32,460 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:40:32,460 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:40:32,461 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:40:32,461 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:40:32,461 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:40:32,461 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:40:32,463 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:40:32,463 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:40:32,464 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 23:40:32,464 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 23:40:32,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:40:32,465 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:40:32,465 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 23:40:32,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:40:32,466 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:40:32,466 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:40:32,466 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 23:40:32,466 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 23:40:32,467 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 23:40:32,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:40:32,467 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 23:40:32,467 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 23:40:32,468 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 23:40:32,468 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:40:32,468 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:40:32,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:40:32,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 23:40:32,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:40:32,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:40:32,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:40:32,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:40:32,471 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-25 23:40:32,471 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 23:40:32,471 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:40:32,471 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 23:40:32,472 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_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9abac63211b9980a3b9079d9eb140a85fbc6c5adec6517ed998cc9e140b19342 [2022-11-25 23:40:32,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:40:32,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:40:32,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:40:32,893 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:40:32,897 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:40:32,898 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-11-25 23:40:35,949 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:40:36,146 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:40:36,147 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2022-11-25 23:40:36,156 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/data/69264facb/431896e08a3c49c59676798147f9c717/FLAG3a1685f93 [2022-11-25 23:40:36,173 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/data/69264facb/431896e08a3c49c59676798147f9c717 [2022-11-25 23:40:36,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:40:36,178 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:40:36,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:40:36,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:40:36,184 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:40:36,185 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:40:36" (1/1) ... [2022-11-25 23:40:36,186 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70a0d003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:40:36, skipping insertion in model container [2022-11-25 23:40:36,186 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:40:36" (1/1) ... [2022-11-25 23:40:36,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:40:36,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:40:36,386 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:40:36,391 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:40:36,417 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:40:36,433 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:40:36,435 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:40:36,436 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:40:36,445 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_9f3848f1-9c0a-4f74-b35a-956954ea12fb/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-11-25 23:40:36,457 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:40:36,472 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-25 23:40:36,476 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:40:36,482 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:40:36,484 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:40:36,485 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:40:36,487 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:40:36,488 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:40:36,490 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:40:36,499 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_9f3848f1-9c0a-4f74-b35a-956954ea12fb/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-11-25 23:40:36,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:40:36,509 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:40:36,524 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:40:36,525 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:40:36,527 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:40:36,528 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:40:36,530 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 23:40:36,531 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 23:40:36,537 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_9f3848f1-9c0a-4f74-b35a-956954ea12fb/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c[2553,2566] [2022-11-25 23:40:36,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:40:36,562 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:40:36,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:40:36 WrapperNode [2022-11-25 23:40:36,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:40:36,565 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:40:36,565 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:40:36,565 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:40:36,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:40:36" (1/1) ... [2022-11-25 23:40:36,588 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:40:36" (1/1) ... [2022-11-25 23:40:36,613 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 98 [2022-11-25 23:40:36,613 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:40:36,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:40:36,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:40:36,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:40:36,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:40:36" (1/1) ... [2022-11-25 23:40:36,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:40:36" (1/1) ... [2022-11-25 23:40:36,630 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:40:36" (1/1) ... [2022-11-25 23:40:36,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:40:36" (1/1) ... [2022-11-25 23:40:36,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:40:36" (1/1) ... [2022-11-25 23:40:36,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:40:36" (1/1) ... [2022-11-25 23:40:36,650 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:40:36" (1/1) ... [2022-11-25 23:40:36,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:40:36" (1/1) ... [2022-11-25 23:40:36,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:40:36,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:40:36,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:40:36,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:40:36,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:40:36" (1/1) ... [2022-11-25 23:40:36,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:40:36,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:40:36,704 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:40:36,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:40:36,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:40:36,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 23:40:36,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 23:40:36,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 23:40:36,764 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 23:40:36,765 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 23:40:36,765 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 23:40:36,765 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 23:40:36,766 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-25 23:40:36,766 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-25 23:40:36,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 23:40:36,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 23:40:36,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 23:40:36,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:40:36,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:40:36,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 23:40:36,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 23:40:36,770 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 23:40:36,927 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:40:36,930 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:40:37,679 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:40:37,872 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:40:37,872 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-25 23:40:37,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:40:37 BoogieIcfgContainer [2022-11-25 23:40:37,878 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:40:37,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:40:37,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:40:37,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:40:37,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:40:36" (1/3) ... [2022-11-25 23:40:37,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ba4df4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:40:37, skipping insertion in model container [2022-11-25 23:40:37,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:40:36" (2/3) ... [2022-11-25 23:40:37,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22ba4df4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:40:37, skipping insertion in model container [2022-11-25 23:40:37,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:40:37" (3/3) ... [2022-11-25 23:40:37,894 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array.wvr.c [2022-11-25 23:40:37,915 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:40:37,915 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-11-25 23:40:37,915 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 23:40:38,082 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 23:40:38,139 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 23:40:38,175 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 178 places, 180 transitions, 384 flow [2022-11-25 23:40:38,180 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 178 places, 180 transitions, 384 flow [2022-11-25 23:40:38,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 178 places, 180 transitions, 384 flow [2022-11-25 23:40:38,317 INFO L130 PetriNetUnfolder]: 12/177 cut-off events. [2022-11-25 23:40:38,317 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 23:40:38,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 177 events. 12/177 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 204 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 126. Up to 2 conditions per place. [2022-11-25 23:40:38,335 INFO L119 LiptonReduction]: Number of co-enabled transitions 2688 [2022-11-25 23:41:10,549 INFO L134 LiptonReduction]: Checked pairs total: 3680 [2022-11-25 23:41:10,549 INFO L136 LiptonReduction]: Total number of compositions: 179 [2022-11-25 23:41:10,558 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 55 transitions, 134 flow [2022-11-25 23:41:10,691 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:10,710 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:41:10,717 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;@432f997a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:41:10,717 INFO L358 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2022-11-25 23:41:10,725 INFO L276 IsEmpty]: Start isEmpty. Operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-25 23:41:10,730 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:10,731 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-25 23:41:10,731 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:41:10,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:10,737 INFO L85 PathProgramCache]: Analyzing trace with hash 23390, now seen corresponding path program 1 times [2022-11-25 23:41:10,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:41:10,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487753048] [2022-11-25 23:41:10,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:10,756 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:41:10,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:41:10,759 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:41:10,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-25 23:41:10,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:10,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:41:10,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:11,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:11,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:41:11,020 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:41:11,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487753048] [2022-11-25 23:41:11,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487753048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:41:11,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:41:11,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:41:11,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976875405] [2022-11-25 23:41:11,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:41:11,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:41:11,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:41:11,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:41:11,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:41:11,098 INFO L87 Difference]: Start difference. First operand has 1830 states, 1330 states have (on average 4.845112781954887) internal successors, (6444), 1829 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:11,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:11,546 INFO L93 Difference]: Finished difference Result 752 states and 2568 transitions. [2022-11-25 23:41:11,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:41:11,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-25 23:41:11,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:11,587 INFO L225 Difference]: With dead ends: 752 [2022-11-25 23:41:11,587 INFO L226 Difference]: Without dead ends: 752 [2022-11-25 23:41:11,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:41:11,595 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:11,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:41:11,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-11-25 23:41:11,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 750. [2022-11-25 23:41:11,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 617 states have (on average 4.162074554294976) internal successors, (2568), 749 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:11,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2568 transitions. [2022-11-25 23:41:11,734 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2568 transitions. Word has length 2 [2022-11-25 23:41:11,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:11,735 INFO L495 AbstractCegarLoop]: Abstraction has 750 states and 2568 transitions. [2022-11-25 23:41:11,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:11,736 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2568 transitions. [2022-11-25 23:41:11,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-25 23:41:11,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:11,736 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-25 23:41:11,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:11,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:41:11,954 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:41:11,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:11,955 INFO L85 PathProgramCache]: Analyzing trace with hash 23234, now seen corresponding path program 1 times [2022-11-25 23:41:11,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:41:11,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317936323] [2022-11-25 23:41:11,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:11,956 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:41:11,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:41:11,958 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:41:11,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-25 23:41:12,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:12,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 23:41:12,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:12,340 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 23:41:12,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 23:41:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:12,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:41:12,396 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:41:12,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1317936323] [2022-11-25 23:41:12,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1317936323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:41:12,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:41:12,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:41:12,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932722786] [2022-11-25 23:41:12,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:41:12,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:41:12,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:41:12,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:41:12,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:41:12,400 INFO L87 Difference]: Start difference. First operand 750 states and 2568 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:12,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:12,637 INFO L93 Difference]: Finished difference Result 749 states and 2566 transitions. [2022-11-25 23:41:12,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:41:12,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-25 23:41:12,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:12,645 INFO L225 Difference]: With dead ends: 749 [2022-11-25 23:41:12,645 INFO L226 Difference]: Without dead ends: 749 [2022-11-25 23:41:12,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:41:12,647 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:12,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:41:12,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-25 23:41:12,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-11-25 23:41:12,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.158833063209076) internal successors, (2566), 748 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:12,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2566 transitions. [2022-11-25 23:41:12,683 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2566 transitions. Word has length 2 [2022-11-25 23:41:12,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:12,683 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2566 transitions. [2022-11-25 23:41:12,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:12,684 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2566 transitions. [2022-11-25 23:41:12,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-25 23:41:12,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:12,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-25 23:41:12,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:12,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:41:12,899 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:41:12,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:12,899 INFO L85 PathProgramCache]: Analyzing trace with hash 23235, now seen corresponding path program 1 times [2022-11-25 23:41:12,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:41:12,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279079066] [2022-11-25 23:41:12,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:12,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:41:12,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:41:12,903 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:41:12,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-25 23:41:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:12,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:41:12,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:13,183 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:41:13,184 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 [2022-11-25 23:41:13,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:13,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:41:13,219 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:41:13,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279079066] [2022-11-25 23:41:13,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279079066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:41:13,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:41:13,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:41:13,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367826576] [2022-11-25 23:41:13,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:41:13,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:41:13,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:41:13,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:41:13,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:41:13,221 INFO L87 Difference]: Start difference. First operand 749 states and 2566 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:13,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:13,571 INFO L93 Difference]: Finished difference Result 749 states and 2565 transitions. [2022-11-25 23:41:13,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:41:13,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-25 23:41:13,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:13,578 INFO L225 Difference]: With dead ends: 749 [2022-11-25 23:41:13,579 INFO L226 Difference]: Without dead ends: 749 [2022-11-25 23:41:13,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:41:13,580 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:13,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:41:13,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-25 23:41:13,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-11-25 23:41:13,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 617 states have (on average 4.157212317666127) internal successors, (2565), 748 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:13,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2565 transitions. [2022-11-25 23:41:13,612 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2565 transitions. Word has length 2 [2022-11-25 23:41:13,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:13,612 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 2565 transitions. [2022-11-25 23:41:13,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:13,615 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2565 transitions. [2022-11-25 23:41:13,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-25 23:41:13,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:13,616 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-25 23:41:13,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:13,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:41:13,829 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:41:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:13,829 INFO L85 PathProgramCache]: Analyzing trace with hash 724765, now seen corresponding path program 1 times [2022-11-25 23:41:13,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:41:13,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941251851] [2022-11-25 23:41:13,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:13,830 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:41:13,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:41:13,832 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:41:13,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:41:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:13,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:41:13,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:14,040 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-11-25 23:41:14,040 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 [2022-11-25 23:41:14,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:41:14,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:41:14,167 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:41:14,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941251851] [2022-11-25 23:41:14,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941251851] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:41:14,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:41:14,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:41:14,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484330734] [2022-11-25 23:41:14,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:41:14,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:41:14,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:41:14,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:41:14,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:41:14,174 INFO L87 Difference]: Start difference. First operand 749 states and 2565 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) [2022-11-25 23:41:14,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:14,489 INFO L93 Difference]: Finished difference Result 623 states and 2064 transitions. [2022-11-25 23:41:14,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:41:14,490 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 [2022-11-25 23:41:14,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:14,495 INFO L225 Difference]: With dead ends: 623 [2022-11-25 23:41:14,495 INFO L226 Difference]: Without dead ends: 623 [2022-11-25 23:41:14,496 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 [2022-11-25 23:41:14,497 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:14,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:41:14,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-11-25 23:41:14,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2022-11-25 23:41:14,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 519 states have (on average 3.976878612716763) internal successors, (2064), 622 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:14,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 2064 transitions. [2022-11-25 23:41:14,550 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 2064 transitions. Word has length 3 [2022-11-25 23:41:14,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:14,551 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 2064 transitions. [2022-11-25 23:41:14,552 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) [2022-11-25 23:41:14,552 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 2064 transitions. [2022-11-25 23:41:14,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-25 23:41:14,552 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:14,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-25 23:41:14,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:14,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:41:14,765 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:41:14,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:14,767 INFO L85 PathProgramCache]: Analyzing trace with hash 724766, now seen corresponding path program 1 times [2022-11-25 23:41:14,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:41:14,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1896124987] [2022-11-25 23:41:14,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:14,768 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:41:14,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:41:14,770 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:41:14,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:41:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:14,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 23:41:14,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:14,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:14,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:14,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:15,069 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2022-11-25 23:41:15,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2022-11-25 23:41:15,101 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-25 23:41:15,102 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 [2022-11-25 23:41:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:15,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:41:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:15,763 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:41:15,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1896124987] [2022-11-25 23:41:15,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1896124987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:41:15,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1169316064] [2022-11-25 23:41:15,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:15,764 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:41:15,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:41:15,767 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:41:15,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-25 23:41:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:15,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:41:15,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:15,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:16,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:16,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:16,098 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-25 23:41:16,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 28 [2022-11-25 23:41:16,122 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 10 treesize of output 8 [2022-11-25 23:41:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:41:16,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:41:16,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1169316064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:41:16,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:41:16,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [2, 2] total 5 [2022-11-25 23:41:16,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893321832] [2022-11-25 23:41:16,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:41:16,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:41:16,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:41:16,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:41:16,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:41:16,231 INFO L87 Difference]: Start difference. First operand 623 states and 2064 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) [2022-11-25 23:41:16,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:16,503 INFO L93 Difference]: Finished difference Result 497 states and 1563 transitions. [2022-11-25 23:41:16,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:41:16,504 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 [2022-11-25 23:41:16,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:16,507 INFO L225 Difference]: With dead ends: 497 [2022-11-25 23:41:16,508 INFO L226 Difference]: Without dead ends: 497 [2022-11-25 23:41:16,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:41:16,509 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:16,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 3 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:41:16,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-11-25 23:41:16,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 497. [2022-11-25 23:41:16,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 421 states have (on average 3.7125890736342044) internal successors, (1563), 496 states have internal predecessors, (1563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:16,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1563 transitions. [2022-11-25 23:41:16,535 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1563 transitions. Word has length 3 [2022-11-25 23:41:16,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:16,545 INFO L495 AbstractCegarLoop]: Abstraction has 497 states and 1563 transitions. [2022-11-25 23:41:16,545 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) [2022-11-25 23:41:16,546 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1563 transitions. [2022-11-25 23:41:16,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-25 23:41:16,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:16,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-25 23:41:16,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:16,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:16,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:41:16,959 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:41:16,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:16,960 INFO L85 PathProgramCache]: Analyzing trace with hash 724610, now seen corresponding path program 1 times [2022-11-25 23:41:16,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:41:16,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1027375878] [2022-11-25 23:41:16,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:16,960 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:41:16,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:41:16,962 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:41:16,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:41:17,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:17,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:41:17,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:17,197 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:41:17,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:41:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:17,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:41:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:17,565 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:41:17,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1027375878] [2022-11-25 23:41:17,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1027375878] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:41:17,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [236869800] [2022-11-25 23:41:17,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:17,566 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:41:17,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:41:17,572 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:41:17,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-25 23:41:17,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:17,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:41:17,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:17,875 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:41:17,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:41:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:17,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:41:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:18,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [236869800] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:41:18,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64014903] [2022-11-25 23:41:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:18,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:41:18,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:41:18,019 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:41:18,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:41:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:18,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:41:18,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:18,275 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:41:18,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:41:18,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:18,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:41:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:18,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64014903] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:41:18,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:41:18,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-25 23:41:18,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949971474] [2022-11-25 23:41:18,507 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:41:18,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:41:18,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:41:18,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:41:18,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-25 23:41:18,508 INFO L87 Difference]: Start difference. First operand 497 states and 1563 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) [2022-11-25 23:41:20,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:20,460 INFO L93 Difference]: Finished difference Result 1486 states and 4685 transitions. [2022-11-25 23:41:20,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:41:20,462 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 [2022-11-25 23:41:20,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:20,475 INFO L225 Difference]: With dead ends: 1486 [2022-11-25 23:41:20,475 INFO L226 Difference]: Without dead ends: 1486 [2022-11-25 23:41:20,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:41:20,476 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 251 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:20,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 15 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-25 23:41:20,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2022-11-25 23:41:20,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 500. [2022-11-25 23:41:20,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 424 states have (on average 3.7004716981132075) internal successors, (1569), 499 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:20,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1569 transitions. [2022-11-25 23:41:20,526 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1569 transitions. Word has length 3 [2022-11-25 23:41:20,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:20,526 INFO L495 AbstractCegarLoop]: Abstraction has 500 states and 1569 transitions. [2022-11-25 23:41:20,526 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) [2022-11-25 23:41:20,526 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1569 transitions. [2022-11-25 23:41:20,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 23:41:20,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:20,527 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 23:41:20,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:20,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:20,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:41:21,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:41:21,131 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:41:21,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:21,131 INFO L85 PathProgramCache]: Analyzing trace with hash 696517786, now seen corresponding path program 1 times [2022-11-25 23:41:21,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:41:21,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206204577] [2022-11-25 23:41:21,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:21,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:41:21,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:41:21,133 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:41:21,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:41:21,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:21,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 23:41:21,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:21,328 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-25 23:41:21,329 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 40 [2022-11-25 23:41:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:41:21,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:41:21,454 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:41:21,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206204577] [2022-11-25 23:41:21,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206204577] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:41:21,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:41:21,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:41:21,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255838137] [2022-11-25 23:41:21,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:41:21,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:41:21,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:41:21,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:41:21,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:41:21,457 INFO L87 Difference]: Start difference. First operand 500 states and 1569 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) [2022-11-25 23:41:21,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:21,662 INFO L93 Difference]: Finished difference Result 470 states and 1484 transitions. [2022-11-25 23:41:21,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:41:21,663 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 [2022-11-25 23:41:21,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:21,666 INFO L225 Difference]: With dead ends: 470 [2022-11-25 23:41:21,667 INFO L226 Difference]: Without dead ends: 470 [2022-11-25 23:41:21,667 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 [2022-11-25 23:41:21,668 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:21,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 3 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:41:21,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-11-25 23:41:21,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 470. [2022-11-25 23:41:21,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 406 states have (on average 3.6551724137931036) internal successors, (1484), 469 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:21,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1484 transitions. [2022-11-25 23:41:21,702 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1484 transitions. Word has length 5 [2022-11-25 23:41:21,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:21,702 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 1484 transitions. [2022-11-25 23:41:21,703 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) [2022-11-25 23:41:21,703 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1484 transitions. [2022-11-25 23:41:21,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-25 23:41:21,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:21,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 23:41:21,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:21,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:41:21,916 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:41:21,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:21,916 INFO L85 PathProgramCache]: Analyzing trace with hash 696517787, now seen corresponding path program 1 times [2022-11-25 23:41:21,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:41:21,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1824969672] [2022-11-25 23:41:21,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:21,917 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:41:21,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:41:21,918 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:41:21,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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)] Waiting until timeout for monitored process [2022-11-25 23:41:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:22,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:41:22,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:22,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:22,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:22,181 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-25 23:41:22,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-25 23:41:22,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-25 23:41:22,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:22,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:41:22,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:22,719 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:41:22,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1824969672] [2022-11-25 23:41:22,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1824969672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:41:22,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2098165496] [2022-11-25 23:41:22,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:22,726 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:41:22,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:41:22,727 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:41:22,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-25 23:41:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:22,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:41:22,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:22,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:22,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:23,020 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-25 23:41:23,020 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 [2022-11-25 23:41:23,046 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 [2022-11-25 23:41:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:41:23,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:41:23,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2098165496] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:41:23,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:41:23,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-25 23:41:23,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221041474] [2022-11-25 23:41:23,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:41:23,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:41:23,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:41:23,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:41:23,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:41:23,187 INFO L87 Difference]: Start difference. First operand 470 states and 1484 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) [2022-11-25 23:41:23,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:23,370 INFO L93 Difference]: Finished difference Result 440 states and 1399 transitions. [2022-11-25 23:41:23,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:41:23,371 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 [2022-11-25 23:41:23,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:23,374 INFO L225 Difference]: With dead ends: 440 [2022-11-25 23:41:23,374 INFO L226 Difference]: Without dead ends: 440 [2022-11-25 23:41:23,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:41:23,376 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:23,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 3 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:41:23,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-11-25 23:41:23,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-11-25 23:41:23,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 388 states have (on average 3.6056701030927836) internal successors, (1399), 439 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:23,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1399 transitions. [2022-11-25 23:41:23,391 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1399 transitions. Word has length 5 [2022-11-25 23:41:23,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:23,392 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 1399 transitions. [2022-11-25 23:41:23,392 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) [2022-11-25 23:41:23,392 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1399 transitions. [2022-11-25 23:41:23,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:41:23,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:23,393 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-25 23:41:23,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:23,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:23,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:41:23,805 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:41:23,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:23,806 INFO L85 PathProgramCache]: Analyzing trace with hash 116314755, now seen corresponding path program 2 times [2022-11-25 23:41:23,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:41:23,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599643944] [2022-11-25 23:41:23,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:41:23,806 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:41:23,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:41:23,807 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:41:23,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-25 23:41:23,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:41:23,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:41:23,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 23:41:23,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:24,079 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:41:24,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:41:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:24,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:41:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:25,038 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:41:25,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599643944] [2022-11-25 23:41:25,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599643944] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:41:25,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [440703076] [2022-11-25 23:41:25,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:41:25,038 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:41:25,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:41:25,040 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:41:25,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-25 23:41:25,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:41:25,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:41:25,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:41:25,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:25,395 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:41:25,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:41:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:25,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:41:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:26,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [440703076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:41:26,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083032458] [2022-11-25 23:41:26,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:41:26,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:41:26,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:41:26,458 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:41:26,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 23:41:26,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:41:26,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:41:26,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:41:26,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:26,722 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:41:26,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:41:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:26,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:41:27,024 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:27,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083032458] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:41:27,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:41:27,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-25 23:41:27,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742351834] [2022-11-25 23:41:27,024 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:41:27,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 23:41:27,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:41:27,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 23:41:27,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-25 23:41:27,026 INFO L87 Difference]: Start difference. First operand 440 states and 1399 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:32,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:32,687 INFO L93 Difference]: Finished difference Result 3910 states and 12515 transitions. [2022-11-25 23:41:32,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:41:32,689 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 23:41:32,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:32,717 INFO L225 Difference]: With dead ends: 3910 [2022-11-25 23:41:32,717 INFO L226 Difference]: Without dead ends: 3910 [2022-11-25 23:41:32,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2022-11-25 23:41:32,718 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 896 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:32,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [896 Valid, 90 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-25 23:41:32,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3910 states. [2022-11-25 23:41:32,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3910 to 446. [2022-11-25 23:41:32,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 394 states have (on average 3.581218274111675) internal successors, (1411), 445 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:32,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1411 transitions. [2022-11-25 23:41:32,771 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1411 transitions. Word has length 6 [2022-11-25 23:41:32,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:32,771 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 1411 transitions. [2022-11-25 23:41:32,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:32,772 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1411 transitions. [2022-11-25 23:41:32,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:41:32,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:32,772 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 23:41:32,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:32,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:33,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:33,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:41:33,385 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:41:33,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:33,386 INFO L85 PathProgramCache]: Analyzing trace with hash 117209272, now seen corresponding path program 1 times [2022-11-25 23:41:33,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:41:33,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812646319] [2022-11-25 23:41:33,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:33,386 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:41:33,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:41:33,387 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:41:33,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-25 23:41:33,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:33,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:41:33,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:33,562 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-25 23:41:33,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-25 23:41:33,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:41:33,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:41:33,600 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:41:33,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812646319] [2022-11-25 23:41:33,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1812646319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:41:33,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:41:33,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:41:33,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909544489] [2022-11-25 23:41:33,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:41:33,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 23:41:33,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:41:33,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 23:41:33,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 23:41:33,602 INFO L87 Difference]: Start difference. First operand 446 states and 1411 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) [2022-11-25 23:41:33,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:33,778 INFO L93 Difference]: Finished difference Result 264 states and 810 transitions. [2022-11-25 23:41:33,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 23:41:33,779 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 [2022-11-25 23:41:33,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:33,782 INFO L225 Difference]: With dead ends: 264 [2022-11-25 23:41:33,783 INFO L226 Difference]: Without dead ends: 264 [2022-11-25 23:41:33,783 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 [2022-11-25 23:41:33,784 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:33,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 3 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:41:33,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-25 23:41:33,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-11-25 23:41:33,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 243 states have (on average 3.3333333333333335) internal successors, (810), 263 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:33,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 810 transitions. [2022-11-25 23:41:33,793 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 810 transitions. Word has length 6 [2022-11-25 23:41:33,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:33,793 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 810 transitions. [2022-11-25 23:41:33,794 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) [2022-11-25 23:41:33,794 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 810 transitions. [2022-11-25 23:41:33,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:41:33,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:33,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 23:41:33,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:34,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:41:34,011 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:41:34,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:34,011 INFO L85 PathProgramCache]: Analyzing trace with hash 117209273, now seen corresponding path program 1 times [2022-11-25 23:41:34,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:41:34,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771913334] [2022-11-25 23:41:34,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:34,012 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 [2022-11-25 23:41:34,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:41:34,013 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:41:34,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-25 23:41:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:34,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:41:34,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:34,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:41:34,401 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 [2022-11-25 23:41:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:34,499 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:41:34,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771913334] [2022-11-25 23:41:34,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771913334] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:41:34,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1642335345] [2022-11-25 23:41:34,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:34,500 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:41:34,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:41:34,502 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:41:34,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-25 23:41:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:34,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 23:41:34,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:34,815 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:41:34,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:41:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:35,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:41:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:35,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1642335345] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:41:35,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486276400] [2022-11-25 23:41:35,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:35,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:41:35,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:41:35,404 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:41:35,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 23:41:35,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:35,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 23:41:35,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:35,636 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:41:35,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:41:35,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:35,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:41:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:35,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486276400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:41:35,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:41:35,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 14 [2022-11-25 23:41:35,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526307082] [2022-11-25 23:41:35,843 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:41:35,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 23:41:35,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:41:35,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 23:41:35,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-25 23:41:35,845 INFO L87 Difference]: Start difference. First operand 264 states and 810 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 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) [2022-11-25 23:41:37,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:37,557 INFO L93 Difference]: Finished difference Result 1216 states and 3758 transitions. [2022-11-25 23:41:37,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 23:41:37,558 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 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 6 [2022-11-25 23:41:37,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:37,566 INFO L225 Difference]: With dead ends: 1216 [2022-11-25 23:41:37,566 INFO L226 Difference]: Without dead ends: 1216 [2022-11-25 23:41:37,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-11-25 23:41:37,567 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 535 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:37,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 29 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-25 23:41:37,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2022-11-25 23:41:37,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 314. [2022-11-25 23:41:37,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 293 states have (on average 3.4948805460750854) internal successors, (1024), 313 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:37,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 1024 transitions. [2022-11-25 23:41:37,587 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 1024 transitions. Word has length 6 [2022-11-25 23:41:37,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:37,588 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 1024 transitions. [2022-11-25 23:41:37,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 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) [2022-11-25 23:41:37,588 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 1024 transitions. [2022-11-25 23:41:37,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:41:37,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:37,589 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:41:37,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:37,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:38,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:38,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:41:38,196 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:41:38,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:38,197 INFO L85 PathProgramCache]: Analyzing trace with hash -661476673, now seen corresponding path program 1 times [2022-11-25 23:41:38,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:41:38,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1269737923] [2022-11-25 23:41:38,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:38,197 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:41:38,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:41:38,199 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:41:38,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-25 23:41:38,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:38,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 23:41:38,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:38,469 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:41:38,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:41:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:41:38,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:41:39,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:41:39,167 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:41:39,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1269737923] [2022-11-25 23:41:39,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1269737923] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:41:39,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [879820810] [2022-11-25 23:41:39,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:39,168 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:41:39,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:41:39,169 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:41:39,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-25 23:41:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:39,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:41:39,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:39,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:41:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:39,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [879820810] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:41:39,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80782458] [2022-11-25 23:41:39,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:39,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:41:39,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:41:39,865 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:41:39,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 23:41:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:39,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:41:39,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:40,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:41:40,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:40,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80782458] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:41:40,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:41:40,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 18 [2022-11-25 23:41:40,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33579480] [2022-11-25 23:41:40,053 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:41:40,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 23:41:40,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:41:40,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 23:41:40,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:41:40,055 INFO L87 Difference]: Start difference. First operand 314 states and 1024 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:44,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:44,208 INFO L93 Difference]: Finished difference Result 815 states and 2597 transitions. [2022-11-25 23:41:44,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 23:41:44,209 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 23:41:44,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:44,214 INFO L225 Difference]: With dead ends: 815 [2022-11-25 23:41:44,214 INFO L226 Difference]: Without dead ends: 815 [2022-11-25 23:41:44,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 23:41:44,215 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 687 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:44,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 82 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-25 23:41:44,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-11-25 23:41:44,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 615. [2022-11-25 23:41:44,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 594 states have (on average 3.5505050505050506) internal successors, (2109), 614 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:44,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 2109 transitions. [2022-11-25 23:41:44,248 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 2109 transitions. Word has length 7 [2022-11-25 23:41:44,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:44,248 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 2109 transitions. [2022-11-25 23:41:44,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:44,249 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 2109 transitions. [2022-11-25 23:41:44,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:41:44,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:44,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:41:44,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:44,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2022-11-25 23:41:44,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:44,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:41:44,862 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:41:44,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:44,862 INFO L85 PathProgramCache]: Analyzing trace with hash -661290164, now seen corresponding path program 1 times [2022-11-25 23:41:44,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:41:44,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752475278] [2022-11-25 23:41:44,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:44,863 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:41:44,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:41:44,864 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:41:44,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-25 23:41:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:44,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 23:41:44,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:45,131 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:41:45,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:41:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:45,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:41:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:45,642 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:41:45,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752475278] [2022-11-25 23:41:45,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752475278] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:41:45,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [996460201] [2022-11-25 23:41:45,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:45,643 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:41:45,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:41:45,644 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:41:45,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-25 23:41:45,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:45,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:41:45,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:45,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 23:41:45,995 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-25 23:41:45,996 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 [2022-11-25 23:41:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:41:46,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:41:46,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [996460201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:41:46,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-25 23:41:46,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-25 23:41:46,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309639106] [2022-11-25 23:41:46,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:41:46,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:41:46,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:41:46,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:41:46,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:41:46,132 INFO L87 Difference]: Start difference. First operand 615 states and 2109 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) [2022-11-25 23:41:46,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:46,309 INFO L93 Difference]: Finished difference Result 567 states and 1957 transitions. [2022-11-25 23:41:46,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:41:46,310 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 [2022-11-25 23:41:46,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:46,313 INFO L225 Difference]: With dead ends: 567 [2022-11-25 23:41:46,314 INFO L226 Difference]: Without dead ends: 567 [2022-11-25 23:41:46,314 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 [2022-11-25 23:41:46,314 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:46,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 3 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:41:46,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-11-25 23:41:46,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2022-11-25 23:41:46,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 552 states have (on average 3.545289855072464) internal successors, (1957), 566 states have internal predecessors, (1957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:46,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1957 transitions. [2022-11-25 23:41:46,339 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1957 transitions. Word has length 7 [2022-11-25 23:41:46,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:46,340 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 1957 transitions. [2022-11-25 23:41:46,340 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) [2022-11-25 23:41:46,340 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1957 transitions. [2022-11-25 23:41:46,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:41:46,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:46,342 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:41:46,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:46,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:46,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:41:46,754 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:41:46,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:46,754 INFO L85 PathProgramCache]: Analyzing trace with hash -661290162, now seen corresponding path program 1 times [2022-11-25 23:41:46,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:41:46,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046590521] [2022-11-25 23:41:46,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:46,755 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:41:46,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:41:46,756 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:41:46,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-25 23:41:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:46,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:41:46,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:46,949 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-25 23:41:46,949 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 [2022-11-25 23:41:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:41:46,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:41:46,989 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:41:46,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046590521] [2022-11-25 23:41:46,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046590521] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:41:46,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:41:46,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 23:41:46,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963040897] [2022-11-25 23:41:46,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:41:46,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:41:46,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:41:46,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:41:46,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:41:46,991 INFO L87 Difference]: Start difference. First operand 567 states and 1957 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) [2022-11-25 23:41:47,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:47,128 INFO L93 Difference]: Finished difference Result 519 states and 1805 transitions. [2022-11-25 23:41:47,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:41:47,129 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 [2022-11-25 23:41:47,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:47,132 INFO L225 Difference]: With dead ends: 519 [2022-11-25 23:41:47,132 INFO L226 Difference]: Without dead ends: 519 [2022-11-25 23:41:47,133 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 [2022-11-25 23:41:47,133 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:47,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 3 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:41:47,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-11-25 23:41:47,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 519. [2022-11-25 23:41:47,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 510 states have (on average 3.5392156862745097) internal successors, (1805), 518 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:47,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1805 transitions. [2022-11-25 23:41:47,150 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1805 transitions. Word has length 7 [2022-11-25 23:41:47,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:47,150 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 1805 transitions. [2022-11-25 23:41:47,150 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) [2022-11-25 23:41:47,150 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1805 transitions. [2022-11-25 23:41:47,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 23:41:47,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:47,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:41:47,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:47,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:41:47,364 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:41:47,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:47,364 INFO L85 PathProgramCache]: Analyzing trace with hash 974836540, now seen corresponding path program 1 times [2022-11-25 23:41:47,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:41:47,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012049471] [2022-11-25 23:41:47,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:47,365 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:41:47,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:41:47,366 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:41:47,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-25 23:41:47,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:47,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:41:47,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:47,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:47,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:41:47,851 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 [2022-11-25 23:41:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:47,946 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:41:47,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012049471] [2022-11-25 23:41:47,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012049471] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:41:47,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [377329015] [2022-11-25 23:41:47,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:47,946 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:41:47,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:41:47,947 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:41:47,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-25 23:41:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:48,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:41:48,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:48,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:48,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:41:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:48,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [377329015] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:41:48,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751810766] [2022-11-25 23:41:48,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:48,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:41:48,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:41:48,718 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:41:48,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-25 23:41:48,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:48,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 23:41:48,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:48,998 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:41:48,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:41:49,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:49,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:41:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:49,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751810766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:41:49,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:41:49,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 22 [2022-11-25 23:41:49,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227204979] [2022-11-25 23:41:49,942 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:41:49,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 23:41:49,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:41:49,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 23:41:49,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-11-25 23:41:49,944 INFO L87 Difference]: Start difference. First operand 519 states and 1805 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) [2022-11-25 23:41:55,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:41:55,018 INFO L93 Difference]: Finished difference Result 1306 states and 4520 transitions. [2022-11-25 23:41:55,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 23:41:55,019 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 [2022-11-25 23:41:55,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:41:55,043 INFO L225 Difference]: With dead ends: 1306 [2022-11-25 23:41:55,043 INFO L226 Difference]: Without dead ends: 1306 [2022-11-25 23:41:55,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 23:41:55,044 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 638 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:41:55,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [638 Valid, 57 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-25 23:41:55,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2022-11-25 23:41:55,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 615. [2022-11-25 23:41:55,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 606 states have (on average 3.6056105610561056) internal successors, (2185), 614 states have internal predecessors, (2185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:41:55,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 2185 transitions. [2022-11-25 23:41:55,079 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 2185 transitions. Word has length 8 [2022-11-25 23:41:55,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:41:55,080 INFO L495 AbstractCegarLoop]: Abstraction has 615 states and 2185 transitions. [2022-11-25 23:41:55,080 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) [2022-11-25 23:41:55,080 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 2185 transitions. [2022-11-25 23:41:55,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:41:55,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:41:55,083 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:41:55,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-25 23:41:55,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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)] Ended with exit code 0 [2022-11-25 23:41:55,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-25 23:41:55,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:41:55,687 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:41:55,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:41:55,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1118435752, now seen corresponding path program 1 times [2022-11-25 23:41:55,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:41:55,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701003351] [2022-11-25 23:41:55,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:55,689 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:41:55,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:41:55,690 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:41:55,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:41:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:55,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 23:41:55,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:55,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:55,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:41:56,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-25 23:41:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:56,502 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:41:56,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701003351] [2022-11-25 23:41:56,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701003351] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:41:56,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1343884114] [2022-11-25 23:41:56,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:56,502 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:41:56,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:41:56,504 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:41:56,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-25 23:41:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:56,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 23:41:56,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:57,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:41:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:57,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1343884114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:41:57,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538684242] [2022-11-25 23:41:57,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:41:57,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:41:57,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:41:57,984 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:41:57,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-25 23:41:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:41:58,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 23:41:58,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:41:58,283 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:41:58,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:41:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:59,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:41:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:41:59,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538684242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:41:59,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:41:59,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 33 [2022-11-25 23:41:59,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045545712] [2022-11-25 23:41:59,911 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:41:59,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-25 23:41:59,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:41:59,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-25 23:41:59,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 23:41:59,913 INFO L87 Difference]: Start difference. First operand 615 states and 2185 transitions. Second operand has 35 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:42:16,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:42:16,140 INFO L93 Difference]: Finished difference Result 2906 states and 10178 transitions. [2022-11-25 23:42:16,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 23:42:16,141 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 23:42:16,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:42:16,157 INFO L225 Difference]: With dead ends: 2906 [2022-11-25 23:42:16,157 INFO L226 Difference]: Without dead ends: 2906 [2022-11-25 23:42:16,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=753, Invalid=3537, Unknown=0, NotChecked=0, Total=4290 [2022-11-25 23:42:16,159 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1678 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1855 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1678 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:42:16,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1678 Valid, 156 Invalid, 1894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1855 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-11-25 23:42:16,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2906 states. [2022-11-25 23:42:16,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2906 to 966. [2022-11-25 23:42:16,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 957 states have (on average 3.820271682340648) internal successors, (3656), 965 states have internal predecessors, (3656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:42:16,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 3656 transitions. [2022-11-25 23:42:16,211 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 3656 transitions. Word has length 10 [2022-11-25 23:42:16,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:42:16,211 INFO L495 AbstractCegarLoop]: Abstraction has 966 states and 3656 transitions. [2022-11-25 23:42:16,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:42:16,212 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 3656 transitions. [2022-11-25 23:42:16,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 23:42:16,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:42:16,213 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:42:16,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-25 23:42:16,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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)] Ended with exit code 0 [2022-11-25 23:42:16,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-11-25 23:42:16,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:42:16,820 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:42:16,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:42:16,821 INFO L85 PathProgramCache]: Analyzing trace with hash 520255631, now seen corresponding path program 1 times [2022-11-25 23:42:16,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:42:16,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1858984922] [2022-11-25 23:42:16,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:42:16,822 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 [2022-11-25 23:42:16,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:42:16,822 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:42:16,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-25 23:42:16,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:42:16,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 23:42:16,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:42:17,095 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:42:17,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:42:17,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:42:17,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:42:18,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:42:18,110 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:42:18,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1858984922] [2022-11-25 23:42:18,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1858984922] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:42:18,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1973874474] [2022-11-25 23:42:18,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:42:18,111 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:42:18,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:42:18,112 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:42:18,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-25 23:42:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:42:18,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 23:42:18,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:42:18,471 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:42:18,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:42:18,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:42:18,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:42:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:42:19,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1973874474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:42:19,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939877411] [2022-11-25 23:42:19,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:42:19,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:42:19,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:42:19,506 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:42:19,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-25 23:42:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:42:19,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 23:42:19,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:42:19,782 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:42:19,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:42:19,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:42:19,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:42:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:42:20,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939877411] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:42:20,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:42:20,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 14 [2022-11-25 23:42:20,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859380561] [2022-11-25 23:42:20,320 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:42:20,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 23:42:20,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:42:20,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 23:42:20,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-11-25 23:42:20,322 INFO L87 Difference]: Start difference. First operand 966 states and 3656 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2022-11-25 23:42:28,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:42:28,952 INFO L93 Difference]: Finished difference Result 1961 states and 7495 transitions. [2022-11-25 23:42:28,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 23:42:28,954 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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 10 [2022-11-25 23:42:28,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:42:28,968 INFO L225 Difference]: With dead ends: 1961 [2022-11-25 23:42:28,969 INFO L226 Difference]: Without dead ends: 1961 [2022-11-25 23:42:28,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=141, Invalid=411, Unknown=0, NotChecked=0, Total=552 [2022-11-25 23:42:28,970 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 259 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:42:28,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 55 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-25 23:42:28,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2022-11-25 23:42:29,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1421. [2022-11-25 23:42:29,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1412 states have (on average 3.9242209631728047) internal successors, (5541), 1420 states have internal predecessors, (5541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:42:29,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 5541 transitions. [2022-11-25 23:42:29,037 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 5541 transitions. Word has length 10 [2022-11-25 23:42:29,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:42:29,038 INFO L495 AbstractCegarLoop]: Abstraction has 1421 states and 5541 transitions. [2022-11-25 23:42:29,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2022-11-25 23:42:29,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 5541 transitions. [2022-11-25 23:42:29,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 23:42:29,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:42:29,039 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-11-25 23:42:29,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-25 23:42:29,249 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-11-25 23:42:29,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-25 23:42:29,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:42:29,647 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:42:29,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:42:29,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1565372680, now seen corresponding path program 2 times [2022-11-25 23:42:29,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:42:29,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [859663296] [2022-11-25 23:42:29,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:42:29,648 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:42:29,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:42:29,649 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:42:29,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-25 23:42:29,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:42:29,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:42:29,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 23:42:29,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:42:29,964 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:42:29,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:42:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:42:30,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:42:32,170 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:42:32,171 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:42:32,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [859663296] [2022-11-25 23:42:32,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [859663296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:42:32,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1727079041] [2022-11-25 23:42:32,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:42:32,171 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:42:32,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:42:32,172 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:42:32,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-25 23:42:32,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:42:32,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:42:32,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 23:42:32,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:42:32,623 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:42:32,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:42:32,678 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 [2022-11-25 23:42:33,090 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:42:33,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:42:34,078 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:42:34,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1727079041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:42:34,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722341683] [2022-11-25 23:42:34,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:42:34,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:42:34,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:42:34,080 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:42:34,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-25 23:42:34,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:42:34,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:42:34,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 23:42:34,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:42:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:42:34,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:42:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:42:35,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722341683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:42:35,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:42:35,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 35 [2022-11-25 23:42:35,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616320868] [2022-11-25 23:42:35,050 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:42:35,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 23:42:35,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:42:35,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 23:42:35,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 23:42:35,052 INFO L87 Difference]: Start difference. First operand 1421 states and 5541 transitions. Second operand has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 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) [2022-11-25 23:42:58,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:42:58,577 INFO L93 Difference]: Finished difference Result 2644 states and 9576 transitions. [2022-11-25 23:42:58,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-25 23:42:58,579 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 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 [2022-11-25 23:42:58,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:42:58,590 INFO L225 Difference]: With dead ends: 2644 [2022-11-25 23:42:58,590 INFO L226 Difference]: Without dead ends: 2644 [2022-11-25 23:42:58,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=851, Invalid=2689, Unknown=0, NotChecked=0, Total=3540 [2022-11-25 23:42:58,592 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1127 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 2149 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1127 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 2170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:42:58,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1127 Valid, 308 Invalid, 2170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2149 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time] [2022-11-25 23:42:58,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2022-11-25 23:42:58,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 1548. [2022-11-25 23:42:58,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1548 states, 1539 states have (on average 3.8382066276803117) internal successors, (5907), 1547 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:42:58,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 5907 transitions. [2022-11-25 23:42:58,676 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 5907 transitions. Word has length 11 [2022-11-25 23:42:58,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:42:58,676 INFO L495 AbstractCegarLoop]: Abstraction has 1548 states and 5907 transitions. [2022-11-25 23:42:58,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 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) [2022-11-25 23:42:58,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 5907 transitions. [2022-11-25 23:42:58,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 23:42:58,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:42:58,678 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-25 23:42:58,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-25 23:42:58,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-25 23:42:59,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-11-25 23:42:59,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:42:59,287 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:42:59,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:42:59,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1428947491, now seen corresponding path program 3 times [2022-11-25 23:42:59,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:42:59,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [264493063] [2022-11-25 23:42:59,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:42:59,288 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:42:59,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:42:59,289 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:42:59,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-25 23:42:59,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 23:42:59,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:42:59,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 23:42:59,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:42:59,670 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:42:59,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:43:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:43:00,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:43:03,587 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:43:03,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [264493063] [2022-11-25 23:43:03,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [264493063] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:43:03,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1448463084] [2022-11-25 23:43:03,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:43:03,588 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:43:03,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:43:03,589 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:43:03,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-25 23:43:04,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 23:43:04,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:43:04,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 23:43:04,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:04,589 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:43:04,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:43:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:43:04,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:08,635 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:43:08,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1448463084] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:43:08,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296488249] [2022-11-25 23:43:08,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:43:08,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:43:08,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:43:08,637 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:43:08,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-25 23:43:10,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 23:43:10,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:43:10,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 23:43:10,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:11,073 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:43:11,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:43:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:43:11,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:11,679 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:43:11,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296488249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:43:11,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:43:11,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 32 [2022-11-25 23:43:11,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128040349] [2022-11-25 23:43:11,680 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:43:11,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 23:43:11,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:43:11,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 23:43:11,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 23:43:11,682 INFO L87 Difference]: Start difference. First operand 1548 states and 5907 transitions. Second operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:43:38,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:43:38,672 INFO L93 Difference]: Finished difference Result 11408 states and 44766 transitions. [2022-11-25 23:43:38,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 23:43:38,674 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 23:43:38,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:43:38,802 INFO L225 Difference]: With dead ends: 11408 [2022-11-25 23:43:38,802 INFO L226 Difference]: Without dead ends: 11408 [2022-11-25 23:43:38,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=618, Invalid=1274, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 23:43:38,804 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 4349 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 3042 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4349 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 3044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:43:38,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4349 Valid, 399 Invalid, 3044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3042 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2022-11-25 23:43:38,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11408 states. [2022-11-25 23:43:39,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11408 to 1560. [2022-11-25 23:43:39,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1551 states have (on average 3.8239845261121856) internal successors, (5931), 1559 states have internal predecessors, (5931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:43:39,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 5931 transitions. [2022-11-25 23:43:39,239 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 5931 transitions. Word has length 12 [2022-11-25 23:43:39,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:43:39,239 INFO L495 AbstractCegarLoop]: Abstraction has 1560 states and 5931 transitions. [2022-11-25 23:43:39,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:43:39,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 5931 transitions. [2022-11-25 23:43:39,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 23:43:39,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:43:39,241 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:43:39,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-11-25 23:43:39,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-25 23:43:39,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-25 23:43:39,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:43:39,846 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:43:39,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:43:39,847 INFO L85 PathProgramCache]: Analyzing trace with hash -175840644, now seen corresponding path program 2 times [2022-11-25 23:43:39,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:43:39,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955227752] [2022-11-25 23:43:39,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:43:39,848 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:43:39,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:43:39,849 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:43:39,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-25 23:43:40,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:43:40,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:43:40,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 23:43:40,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:40,222 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 23:43:40,223 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 [2022-11-25 23:43:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:43:40,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:41,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:43:41,752 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:43:41,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955227752] [2022-11-25 23:43:41,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [955227752] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:43:41,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1235423305] [2022-11-25 23:43:41,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:43:41,753 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:43:41,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:43:41,755 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:43:41,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-25 23:43:42,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:43:42,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:43:42,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:43:42,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:43:43,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:43:44,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1235423305] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:43:44,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161333813] [2022-11-25 23:43:44,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:43:44,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:43:44,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:43:44,193 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:43:44,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-25 23:43:44,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:43:44,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:43:44,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 23:43:44,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:43:44,539 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:43:44,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:43:45,649 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 7 treesize of output 5 [2022-11-25 23:43:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:43:45,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:43:45,894 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 8 treesize of output 6 [2022-11-25 23:43:45,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-25 23:43:45,936 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-25 23:43:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:43:49,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161333813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:43:49,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:43:49,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 8, 8, 8] total 48 [2022-11-25 23:43:49,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767911902] [2022-11-25 23:43:49,590 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:43:49,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-25 23:43:49,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:43:49,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-25 23:43:49,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2225, Unknown=0, NotChecked=0, Total=2450 [2022-11-25 23:43:49,592 INFO L87 Difference]: Start difference. First operand 1560 states and 5931 transitions. Second operand has 50 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:44:16,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:44:16,365 INFO L93 Difference]: Finished difference Result 2762 states and 9640 transitions. [2022-11-25 23:44:16,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-25 23:44:16,366 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 23:44:16,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:44:16,379 INFO L225 Difference]: With dead ends: 2762 [2022-11-25 23:44:16,379 INFO L226 Difference]: Without dead ends: 2762 [2022-11-25 23:44:16,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=887, Invalid=5119, Unknown=0, NotChecked=0, Total=6006 [2022-11-25 23:44:16,382 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1659 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 4951 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1659 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 4986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 4951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:44:16,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1659 Valid, 391 Invalid, 4986 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [35 Valid, 4951 Invalid, 0 Unknown, 0 Unchecked, 19.2s Time] [2022-11-25 23:44:16,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2762 states. [2022-11-25 23:44:16,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2762 to 1816. [2022-11-25 23:44:16,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1807 states have (on average 3.923076923076923) internal successors, (7089), 1815 states have internal predecessors, (7089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:44:16,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 7089 transitions. [2022-11-25 23:44:16,471 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 7089 transitions. Word has length 12 [2022-11-25 23:44:16,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:44:16,472 INFO L495 AbstractCegarLoop]: Abstraction has 1816 states and 7089 transitions. [2022-11-25 23:44:16,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 49 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:44:16,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 7089 transitions. [2022-11-25 23:44:16,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 23:44:16,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:44:16,474 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:44:16,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-25 23:44:16,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-25 23:44:16,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-25 23:44:17,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:44:17,091 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:44:17,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:44:17,092 INFO L85 PathProgramCache]: Analyzing trace with hash -916013975, now seen corresponding path program 1 times [2022-11-25 23:44:17,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:44:17,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119222121] [2022-11-25 23:44:17,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:44:17,092 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:44:17,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:44:17,094 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:44:17,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:44:17,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:44:17,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 23:44:17,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:17,407 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:44:17,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:44:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:44:17,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:20,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:44:20,346 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:44:20,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119222121] [2022-11-25 23:44:20,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [119222121] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:20,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [349700264] [2022-11-25 23:44:20,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:44:20,347 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:44:20,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:44:20,348 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:44:20,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-25 23:44:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:44:20,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 23:44:20,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:20,826 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:44:20,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:44:21,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:44:21,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:44:24,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [349700264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:24,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911617903] [2022-11-25 23:44:24,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:44:24,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:44:24,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:44:24,090 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:44:24,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-25 23:44:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:44:24,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-25 23:44:24,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:24,451 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:44:24,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:44:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:44:24,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:44:25,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911617903] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:25,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:44:25,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 20 [2022-11-25 23:44:25,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005092574] [2022-11-25 23:44:25,595 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:44:25,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 23:44:25,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:44:25,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 23:44:25,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2022-11-25 23:44:25,597 INFO L87 Difference]: Start difference. First operand 1816 states and 7089 transitions. Second operand has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:44:53,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:44:53,524 INFO L93 Difference]: Finished difference Result 3146 states and 12606 transitions. [2022-11-25 23:44:53,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 23:44:53,526 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 23:44:53,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:44:53,543 INFO L225 Difference]: With dead ends: 3146 [2022-11-25 23:44:53,543 INFO L226 Difference]: Without dead ends: 3146 [2022-11-25 23:44:53,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 23:44:53,544 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 606 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:44:53,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [606 Valid, 127 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-11-25 23:44:53,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2022-11-25 23:44:53,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 2412. [2022-11-25 23:44:53,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2412 states, 2403 states have (on average 4.1610486891385765) internal successors, (9999), 2411 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) [2022-11-25 23:44:53,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2412 states to 2412 states and 9999 transitions. [2022-11-25 23:44:53,655 INFO L78 Accepts]: Start accepts. Automaton has 2412 states and 9999 transitions. Word has length 12 [2022-11-25 23:44:53,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:44:53,656 INFO L495 AbstractCegarLoop]: Abstraction has 2412 states and 9999 transitions. [2022-11-25 23:44:53,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:44:53,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2412 states and 9999 transitions. [2022-11-25 23:44:53,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 23:44:53,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:44:53,658 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:44:53,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-25 23:44:53,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2022-11-25 23:44:54,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:44:54,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:44:54,270 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:44:54,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:44:54,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1749585839, now seen corresponding path program 2 times [2022-11-25 23:44:54,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:44:54,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180219502] [2022-11-25 23:44:54,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:44:54,271 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:44:54,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:44:54,272 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:44:54,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-25 23:44:54,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:44:54,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:44:54,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 23:44:54,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:44:54,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:44:55,153 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:44:55,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180219502] [2022-11-25 23:44:55,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180219502] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:55,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [629546459] [2022-11-25 23:44:55,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:44:55,154 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:44:55,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:44:55,155 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:44:55,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-25 23:44:55,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:44:55,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:44:55,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 23:44:55,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:44:55,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:44:55,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [629546459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:55,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707316854] [2022-11-25 23:44:55,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:44:55,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:44:55,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:44:55,754 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:44:55,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-25 23:44:56,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 23:44:56,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:44:56,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 23:44:56,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:44:56,204 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:44:56,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:44:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:44:56,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:44:56,791 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 8 treesize of output 6 [2022-11-25 23:44:56,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-25 23:44:56,818 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-25 23:44:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:44:57,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707316854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:44:57,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:44:57,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 23 [2022-11-25 23:44:57,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15662877] [2022-11-25 23:44:57,959 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:44:57,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 23:44:57,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:44:57,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 23:44:57,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-11-25 23:44:57,960 INFO L87 Difference]: Start difference. First operand 2412 states and 9999 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:45:07,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:45:07,296 INFO L93 Difference]: Finished difference Result 2516 states and 10168 transitions. [2022-11-25 23:45:07,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 23:45:07,298 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-25 23:45:07,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:45:07,307 INFO L225 Difference]: With dead ends: 2516 [2022-11-25 23:45:07,307 INFO L226 Difference]: Without dead ends: 2516 [2022-11-25 23:45:07,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2022-11-25 23:45:07,308 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 359 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:45:07,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 146 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-11-25 23:45:07,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2022-11-25 23:45:07,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 2410. [2022-11-25 23:45:07,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2410 states, 2401 states have (on average 4.14618908788005) internal successors, (9955), 2409 states have internal predecessors, (9955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:45:07,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2410 states to 2410 states and 9955 transitions. [2022-11-25 23:45:07,402 INFO L78 Accepts]: Start accepts. Automaton has 2410 states and 9955 transitions. Word has length 12 [2022-11-25 23:45:07,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:45:07,402 INFO L495 AbstractCegarLoop]: Abstraction has 2410 states and 9955 transitions. [2022-11-25 23:45:07,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:45:07,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2410 states and 9955 transitions. [2022-11-25 23:45:07,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 23:45:07,404 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:45:07,404 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:45:07,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2022-11-25 23:45:07,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-25 23:45:07,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-25 23:45:08,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:45:08,010 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:45:08,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:45:08,010 INFO L85 PathProgramCache]: Analyzing trace with hash -251960978, now seen corresponding path program 2 times [2022-11-25 23:45:08,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:45:08,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848278256] [2022-11-25 23:45:08,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 23:45:08,010 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:45:08,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:45:08,011 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:45:08,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:45:08,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 23:45:08,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:45:08,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 23:45:08,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:08,333 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:45:08,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:45:08,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 23:45:08,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:45:08,610 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:45:08,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848278256] [2022-11-25 23:45:08,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848278256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:45:08,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:45:08,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:45:08,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298185460] [2022-11-25 23:45:08,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:45:08,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:45:08,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:45:08,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:45:08,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:45:08,611 INFO L87 Difference]: Start difference. First operand 2410 states and 9955 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:45:09,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:45:09,036 INFO L93 Difference]: Finished difference Result 2538 states and 10103 transitions. [2022-11-25 23:45:09,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:45:09,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 23:45:09,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:45:09,055 INFO L225 Difference]: With dead ends: 2538 [2022-11-25 23:45:09,055 INFO L226 Difference]: Without dead ends: 2538 [2022-11-25 23:45:09,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:45:09,056 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 60 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:45:09,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 6 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:45:09,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2022-11-25 23:45:09,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 2476. [2022-11-25 23:45:09,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2476 states, 2467 states have (on average 4.0279691933522495) internal successors, (9937), 2475 states have internal predecessors, (9937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:45:09,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 9937 transitions. [2022-11-25 23:45:09,137 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 9937 transitions. Word has length 13 [2022-11-25 23:45:09,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:45:09,138 INFO L495 AbstractCegarLoop]: Abstraction has 2476 states and 9937 transitions. [2022-11-25 23:45:09,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:45:09,138 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 9937 transitions. [2022-11-25 23:45:09,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 23:45:09,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:45:09,140 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2022-11-25 23:45:09,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:45:09,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:45:09,352 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:45:09,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:45:09,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1363153569, now seen corresponding path program 3 times [2022-11-25 23:45:09,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:45:09,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895693495] [2022-11-25 23:45:09,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:45:09,353 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 [2022-11-25 23:45:09,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:45:09,354 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:45:09,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-25 23:45:09,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 23:45:09,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:45:09,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 23:45:09,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:09,860 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:45:09,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:45:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:45:10,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:45:10,648 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 8 treesize of output 6 [2022-11-25 23:45:10,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-25 23:45:10,692 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-25 23:45:13,481 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:45:13,481 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:45:13,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895693495] [2022-11-25 23:45:13,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895693495] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:45:13,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [822821212] [2022-11-25 23:45:13,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:45:13,482 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:45:13,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:45:13,483 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:45:13,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-25 23:45:14,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 23:45:14,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:45:14,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:45:14,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:14,726 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:45:14,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:45:14,942 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:45:14,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:45:15,000 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 8 treesize of output 6 [2022-11-25 23:45:15,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-25 23:45:15,045 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-25 23:45:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:45:16,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [822821212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:45:16,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386596005] [2022-11-25 23:45:16,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:45:16,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:45:16,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:45:16,785 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:45:16,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-25 23:45:17,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 23:45:17,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:45:17,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:45:17,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:45:18,631 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:45:18,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:45:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:45:20,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386596005] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:45:20,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:45:20,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 10, 10] total 43 [2022-11-25 23:45:20,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679909880] [2022-11-25 23:45:20,641 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:45:20,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-25 23:45:20,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:45:20,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-25 23:45:20,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1691, Unknown=0, NotChecked=0, Total=1892 [2022-11-25 23:45:20,642 INFO L87 Difference]: Start difference. First operand 2476 states and 9937 transitions. Second operand has 44 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 43 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:19,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:46:19,210 INFO L93 Difference]: Finished difference Result 5962 states and 22802 transitions. [2022-11-25 23:46:19,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-25 23:46:19,213 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 43 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-25 23:46:19,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:46:19,235 INFO L225 Difference]: With dead ends: 5962 [2022-11-25 23:46:19,235 INFO L226 Difference]: Without dead ends: 5962 [2022-11-25 23:46:19,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1611 ImplicationChecksByTransitivity, 38.2s TimeCoverageRelationStatistics Valid=1111, Invalid=6029, Unknown=0, NotChecked=0, Total=7140 [2022-11-25 23:46:19,238 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1684 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 4849 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1684 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 4885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 4849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:46:19,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1684 Valid, 739 Invalid, 4885 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [36 Valid, 4849 Invalid, 0 Unknown, 0 Unchecked, 27.4s Time] [2022-11-25 23:46:19,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5962 states. [2022-11-25 23:46:19,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5962 to 3172. [2022-11-25 23:46:19,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3172 states, 3163 states have (on average 4.036674043629466) internal successors, (12768), 3171 states have internal predecessors, (12768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:19,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3172 states to 3172 states and 12768 transitions. [2022-11-25 23:46:19,377 INFO L78 Accepts]: Start accepts. Automaton has 3172 states and 12768 transitions. Word has length 13 [2022-11-25 23:46:19,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:46:19,378 INFO L495 AbstractCegarLoop]: Abstraction has 3172 states and 12768 transitions. [2022-11-25 23:46:19,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 43 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:46:19,378 INFO L276 IsEmpty]: Start isEmpty. Operand 3172 states and 12768 transitions. [2022-11-25 23:46:19,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 23:46:19,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:46:19,380 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:46:19,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-25 23:46:19,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-11-25 23:46:19,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2022-11-25 23:46:19,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:46:19,995 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:46:19,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:46:19,996 INFO L85 PathProgramCache]: Analyzing trace with hash 620316312, now seen corresponding path program 3 times [2022-11-25 23:46:19,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:46:19,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850967326] [2022-11-25 23:46:19,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:46:19,996 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:46:19,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:46:19,998 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:46:20,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-25 23:46:20,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:46:20,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:46:20,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:46:20,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:46:20,462 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-25 23:46:20,462 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 [2022-11-25 23:46:20,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2022-11-25 23:46:20,723 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 7 treesize of output 5 [2022-11-25 23:46:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:20,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:46:20,925 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 8 treesize of output 6 [2022-11-25 23:46:20,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-25 23:46:20,959 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-25 23:46:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:23,348 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:46:23,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850967326] [2022-11-25 23:46:23,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850967326] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:46:23,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2098742646] [2022-11-25 23:46:23,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:46:23,348 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:46:23,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:46:23,349 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:46:23,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-25 23:46:23,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:46:23,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:46:23,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 23:46:23,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:46:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:25,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:46:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:27,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2098742646] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:46:27,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254608551] [2022-11-25 23:46:27,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:46:27,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:46:27,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:46:27,461 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:46:27,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-25 23:46:27,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:46:27,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:46:27,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 23:46:27,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:46:27,908 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:46:27,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:46:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:29,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:46:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:46:33,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254608551] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:46:33,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:46:33,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11, 10, 10, 10] total 60 [2022-11-25 23:46:33,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020166667] [2022-11-25 23:46:33,479 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:46:33,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-25 23:46:33,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:46:33,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-25 23:46:33,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=3485, Unknown=0, NotChecked=0, Total=3782 [2022-11-25 23:46:33,485 INFO L87 Difference]: Start difference. First operand 3172 states and 12768 transitions. Second operand has 62 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:17,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:47:17,846 INFO L93 Difference]: Finished difference Result 6172 states and 22603 transitions. [2022-11-25 23:47:17,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-25 23:47:17,847 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-25 23:47:17,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:47:17,865 INFO L225 Difference]: With dead ends: 6172 [2022-11-25 23:47:17,865 INFO L226 Difference]: Without dead ends: 6172 [2022-11-25 23:47:17,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2564 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=1414, Invalid=8888, Unknown=0, NotChecked=0, Total=10302 [2022-11-25 23:47:17,867 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 3344 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 9037 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3344 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 9106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 9037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:47:17,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3344 Valid, 705 Invalid, 9106 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [69 Valid, 9037 Invalid, 0 Unknown, 0 Unchecked, 27.9s Time] [2022-11-25 23:47:17,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6172 states. [2022-11-25 23:47:17,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6172 to 3890. [2022-11-25 23:47:17,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3890 states, 3881 states have (on average 4.18191187838186) internal successors, (16230), 3889 states have internal predecessors, (16230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:18,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3890 states to 3890 states and 16230 transitions. [2022-11-25 23:47:18,042 INFO L78 Accepts]: Start accepts. Automaton has 3890 states and 16230 transitions. Word has length 14 [2022-11-25 23:47:18,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:47:18,042 INFO L495 AbstractCegarLoop]: Abstraction has 3890 states and 16230 transitions. [2022-11-25 23:47:18,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.360655737704918) internal successors, (83), 61 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:18,043 INFO L276 IsEmpty]: Start isEmpty. Operand 3890 states and 16230 transitions. [2022-11-25 23:47:18,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-25 23:47:18,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:47:18,045 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:47:18,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-25 23:47:18,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-11-25 23:47:18,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2022-11-25 23:47:18,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-25 23:47:18,659 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:47:18,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:47:18,659 INFO L85 PathProgramCache]: Analyzing trace with hash -850219121, now seen corresponding path program 3 times [2022-11-25 23:47:18,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:47:18,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283862990] [2022-11-25 23:47:18,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:47:18,660 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:47:18,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:47:18,661 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:47:18,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-25 23:47:18,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 23:47:18,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:47:18,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 23:47:18,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:47:19,079 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:47:19,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:47:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:47:19,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:47:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:47:21,736 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:47:21,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283862990] [2022-11-25 23:47:21,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283862990] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:47:21,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1064490881] [2022-11-25 23:47:21,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:47:21,737 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:47:21,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:47:21,739 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:47:21,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-25 23:47:22,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 23:47:22,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:47:22,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 23:47:22,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:47:22,347 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:47:22,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:47:22,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 90 [2022-11-25 23:47:22,967 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 7 treesize of output 5 [2022-11-25 23:47:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:47:22,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:47:23,445 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 8 treesize of output 6 [2022-11-25 23:47:23,501 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-25 23:47:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:47:26,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1064490881] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:47:26,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985693029] [2022-11-25 23:47:26,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:47:26,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:47:26,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:47:26,338 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:47:26,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-25 23:47:26,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 23:47:26,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:47:26,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 23:47:26,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:47:26,761 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:47:26,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:47:27,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 28 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 90 [2022-11-25 23:47:27,231 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 7 treesize of output 5 [2022-11-25 23:47:27,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:47:27,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:47:27,437 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 8 treesize of output 6 [2022-11-25 23:47:27,526 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-25 23:47:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 23:47:30,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985693029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:47:30,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:47:30,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 17 [2022-11-25 23:47:30,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872934379] [2022-11-25 23:47:30,188 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:47:30,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 23:47:30,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:47:30,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 23:47:30,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-11-25 23:47:30,189 INFO L87 Difference]: Start difference. First operand 3890 states and 16230 transitions. Second operand has 19 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:33,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:47:36,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-25 23:47:36,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:47:36,690 INFO L93 Difference]: Finished difference Result 4170 states and 17186 transitions. [2022-11-25 23:47:36,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:47:36,691 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-25 23:47:36,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:47:36,703 INFO L225 Difference]: With dead ends: 4170 [2022-11-25 23:47:36,704 INFO L226 Difference]: Without dead ends: 4170 [2022-11-25 23:47:36,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2022-11-25 23:47:36,704 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 272 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:47:36,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 28 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 241 Invalid, 2 Unknown, 0 Unchecked, 5.8s Time] [2022-11-25 23:47:36,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2022-11-25 23:47:36,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 2762. [2022-11-25 23:47:36,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2762 states, 2757 states have (on average 4.022488211824447) internal successors, (11090), 2761 states have internal predecessors, (11090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:36,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2762 states to 2762 states and 11090 transitions. [2022-11-25 23:47:36,810 INFO L78 Accepts]: Start accepts. Automaton has 2762 states and 11090 transitions. Word has length 14 [2022-11-25 23:47:36,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:47:36,810 INFO L495 AbstractCegarLoop]: Abstraction has 2762 states and 11090 transitions. [2022-11-25 23:47:36,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:47:36,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2762 states and 11090 transitions. [2022-11-25 23:47:36,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 23:47:36,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:47:36,815 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1] [2022-11-25 23:47:36,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-25 23:47:37,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2022-11-25 23:47:37,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-11-25 23:47:37,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:47:37,429 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:47:37,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:47:37,430 INFO L85 PathProgramCache]: Analyzing trace with hash -500265160, now seen corresponding path program 4 times [2022-11-25 23:47:37,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:47:37,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724423666] [2022-11-25 23:47:37,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:47:37,430 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:47:37,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:47:37,432 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:47:37,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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)] Waiting until timeout for monitored process [2022-11-25 23:47:37,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:47:37,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:47:37,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 23:47:37,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:47:38,174 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:38,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:47:39,737 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 38 treesize of output 32 [2022-11-25 23:47:40,934 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:40,934 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:47:40,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724423666] [2022-11-25 23:47:40,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724423666] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:47:40,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [945243035] [2022-11-25 23:47:40,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:47:40,934 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:47:40,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:47:40,935 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:47:40,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-25 23:47:41,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:47:41,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:47:41,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 23:47:41,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:47:41,499 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:47:41,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:47:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:43,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:47:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:47:46,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [945243035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:47:46,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469023369] [2022-11-25 23:47:46,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:47:46,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:47:46,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:47:46,334 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:47:46,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-25 23:47:46,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:47:46,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:47:46,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 23:47:46,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:47:46,727 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:47:46,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:47:50,926 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 7 treesize of output 5 [2022-11-25 23:47:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:47:51,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:47:51,263 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 8 treesize of output 6 [2022-11-25 23:47:51,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-25 23:47:51,304 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-25 23:47:57,910 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:47:57,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469023369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:47:57,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:47:57,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 12, 12] total 69 [2022-11-25 23:47:57,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425674375] [2022-11-25 23:47:57,911 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:47:57,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-25 23:47:57,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:47:57,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-25 23:47:57,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=4451, Unknown=1, NotChecked=0, Total=4970 [2022-11-25 23:47:57,914 INFO L87 Difference]: Start difference. First operand 2762 states and 11090 transitions. Second operand has 71 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 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) [2022-11-25 23:50:11,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:50:11,931 INFO L93 Difference]: Finished difference Result 13972 states and 51406 transitions. [2022-11-25 23:50:11,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-25 23:50:11,931 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 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 15 [2022-11-25 23:50:11,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:50:11,984 INFO L225 Difference]: With dead ends: 13972 [2022-11-25 23:50:11,984 INFO L226 Difference]: Without dead ends: 13972 [2022-11-25 23:50:11,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6889 ImplicationChecksByTransitivity, 115.6s TimeCoverageRelationStatistics Valid=3721, Invalid=19840, Unknown=1, NotChecked=0, Total=23562 [2022-11-25 23:50:11,987 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 6635 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 9760 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6635 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 9807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 9760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:50:11,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6635 Valid, 1474 Invalid, 9807 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [47 Valid, 9760 Invalid, 0 Unknown, 0 Unchecked, 34.9s Time] [2022-11-25 23:50:12,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13972 states. [2022-11-25 23:50:12,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13972 to 2978. [2022-11-25 23:50:12,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2978 states, 2973 states have (on average 4.10427177934746) internal successors, (12202), 2977 states have internal predecessors, (12202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:50:12,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 12202 transitions. [2022-11-25 23:50:12,225 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 12202 transitions. Word has length 15 [2022-11-25 23:50:12,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:50:12,225 INFO L495 AbstractCegarLoop]: Abstraction has 2978 states and 12202 transitions. [2022-11-25 23:50:12,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.1714285714285715) internal successors, (82), 70 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) [2022-11-25 23:50:12,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 12202 transitions. [2022-11-25 23:50:12,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-25 23:50:12,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:50:12,228 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2022-11-25 23:50:12,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-11-25 23:50:12,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2022-11-25 23:50:12,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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)] Ended with exit code 0 [2022-11-25 23:50:12,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:50:12,838 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:50:12,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:50:12,839 INFO L85 PathProgramCache]: Analyzing trace with hash -352728705, now seen corresponding path program 5 times [2022-11-25 23:50:12,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:50:12,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412579268] [2022-11-25 23:50:12,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 23:50:12,840 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:50:12,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:50:12,841 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:50:12,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:50:13,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-25 23:50:13,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:50:13,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 23:50:13,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:13,392 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:50:13,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:50:14,145 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 7 treesize of output 5 [2022-11-25 23:50:14,309 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:14,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:14,738 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 8 treesize of output 6 [2022-11-25 23:50:14,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-25 23:50:14,785 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-25 23:50:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:19,698 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:50:19,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412579268] [2022-11-25 23:50:19,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412579268] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:50:19,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [989965440] [2022-11-25 23:50:19,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 23:50:19,698 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:50:19,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:50:19,700 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:50:19,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-11-25 23:50:20,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-25 23:50:20,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:50:20,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 23:50:20,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:22,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:25,706 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:25,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [989965440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:50:25,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013963381] [2022-11-25 23:50:25,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 23:50:25,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:50:25,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:50:25,708 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:50:25,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-25 23:50:26,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-25 23:50:26,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:50:26,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 23:50:26,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:50:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:28,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:50:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:50:30,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013963381] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:50:30,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:50:30,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 70 [2022-11-25 23:50:30,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17578986] [2022-11-25 23:50:30,852 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:50:30,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-25 23:50:30,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:50:30,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-25 23:50:30,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=759, Invalid=4353, Unknown=0, NotChecked=0, Total=5112 [2022-11-25 23:50:30,854 INFO L87 Difference]: Start difference. First operand 2978 states and 12202 transitions. Second operand has 72 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:32,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:51:32,101 INFO L93 Difference]: Finished difference Result 4706 states and 17854 transitions. [2022-11-25 23:51:32,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-25 23:51:32,103 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-25 23:51:32,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:51:32,115 INFO L225 Difference]: With dead ends: 4706 [2022-11-25 23:51:32,115 INFO L226 Difference]: Without dead ends: 4706 [2022-11-25 23:51:32,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4306 ImplicationChecksByTransitivity, 45.0s TimeCoverageRelationStatistics Valid=2305, Invalid=11975, Unknown=0, NotChecked=0, Total=14280 [2022-11-25 23:51:32,117 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 3165 mSDsluCounter, 1626 mSDsCounter, 0 mSdLazyCounter, 9383 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3165 SdHoareTripleChecker+Valid, 1691 SdHoareTripleChecker+Invalid, 9462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 9383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:51:32,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3165 Valid, 1691 Invalid, 9462 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [79 Valid, 9383 Invalid, 0 Unknown, 0 Unchecked, 29.4s Time] [2022-11-25 23:51:32,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4706 states. [2022-11-25 23:51:32,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4706 to 3109. [2022-11-25 23:51:32,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3109 states, 3104 states have (on average 3.868234536082474) internal successors, (12007), 3108 states have internal predecessors, (12007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:32,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3109 states to 3109 states and 12007 transitions. [2022-11-25 23:51:32,211 INFO L78 Accepts]: Start accepts. Automaton has 3109 states and 12007 transitions. Word has length 15 [2022-11-25 23:51:32,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:51:32,212 INFO L495 AbstractCegarLoop]: Abstraction has 3109 states and 12007 transitions. [2022-11-25 23:51:32,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 71 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:51:32,212 INFO L276 IsEmpty]: Start isEmpty. Operand 3109 states and 12007 transitions. [2022-11-25 23:51:32,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-25 23:51:32,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:51:32,216 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:51:32,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:32,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (65)] Forceful destruction successful, exit code 0 [2022-11-25 23:51:32,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:51:32,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:51:32,828 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:51:32,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:51:32,828 INFO L85 PathProgramCache]: Analyzing trace with hash -220646980, now seen corresponding path program 4 times [2022-11-25 23:51:32,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:51:32,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478327660] [2022-11-25 23:51:32,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:51:32,829 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:51:32,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:51:32,829 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:51:32,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:51:33,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:51:33,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:51:33,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 23:51:33,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:33,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:34,842 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 38 treesize of output 32 [2022-11-25 23:51:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:36,159 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:51:36,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478327660] [2022-11-25 23:51:36,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478327660] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:36,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1681122167] [2022-11-25 23:51:36,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:51:36,160 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:51:36,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:51:36,161 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:51:36,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-11-25 23:51:36,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:51:36,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:51:36,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 23:51:36,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:38,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:41,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1681122167] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:41,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580453825] [2022-11-25 23:51:41,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:51:41,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:51:41,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:51:41,481 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:51:41,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-25 23:51:41,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:51:41,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:51:41,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 23:51:41,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:51:41,878 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:51:41,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:51:44,035 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 7 treesize of output 5 [2022-11-25 23:51:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:44,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:51:44,341 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 8 treesize of output 6 [2022-11-25 23:51:44,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-25 23:51:44,384 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-25 23:51:53,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:51:53,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580453825] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:51:53,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-25 23:51:53,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 71 [2022-11-25 23:51:53,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618416931] [2022-11-25 23:51:53,039 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-25 23:51:53,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-25 23:51:53,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-25 23:51:53,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-25 23:51:53,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=4870, Unknown=0, NotChecked=0, Total=5256 [2022-11-25 23:51:53,042 INFO L87 Difference]: Start difference. First operand 3109 states and 12007 transitions. Second operand has 73 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 72 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:49,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:54:49,648 INFO L93 Difference]: Finished difference Result 15201 states and 54548 transitions. [2022-11-25 23:54:49,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-11-25 23:54:49,650 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 72 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-25 23:54:49,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:54:49,701 INFO L225 Difference]: With dead ends: 15201 [2022-11-25 23:54:49,701 INFO L226 Difference]: Without dead ends: 15201 [2022-11-25 23:54:49,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9253 ImplicationChecksByTransitivity, 124.6s TimeCoverageRelationStatistics Valid=4301, Invalid=29005, Unknown=0, NotChecked=0, Total=33306 [2022-11-25 23:54:49,704 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 12145 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 14393 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12145 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 14663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 14393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:54:49,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12145 Valid, 1215 Invalid, 14663 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [270 Valid, 14393 Invalid, 0 Unknown, 0 Unchecked, 67.9s Time] [2022-11-25 23:54:49,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15201 states. [2022-11-25 23:54:49,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15201 to 3115. [2022-11-25 23:54:49,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3115 states, 3110 states have (on average 3.887138263665595) internal successors, (12089), 3114 states have internal predecessors, (12089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:49,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3115 states to 3115 states and 12089 transitions. [2022-11-25 23:54:49,974 INFO L78 Accepts]: Start accepts. Automaton has 3115 states and 12089 transitions. Word has length 16 [2022-11-25 23:54:49,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:54:49,974 INFO L495 AbstractCegarLoop]: Abstraction has 3115 states and 12089 transitions. [2022-11-25 23:54:49,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 1.3194444444444444) internal successors, (95), 72 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:54:49,975 INFO L276 IsEmpty]: Start isEmpty. Operand 3115 states and 12089 transitions. [2022-11-25 23:54:49,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-25 23:54:49,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:54:49,980 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:54:49,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:50,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (68)] Forceful destruction successful, exit code 0 [2022-11-25 23:54:50,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:54:50,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 23:54:50,591 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2022-11-25 23:54:50,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:54:50,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1559922392, now seen corresponding path program 5 times [2022-11-25 23:54:50,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-25 23:54:50,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965404230] [2022-11-25 23:54:50,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 23:54:50,592 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 [2022-11-25 23:54:50,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat [2022-11-25 23:54:50,593 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 23:54:50,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/mathsat -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 [2022-11-25 23:54:50,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-25 23:54:50,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:54:50,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 23:54:50,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:51,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:54:53,392 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 38 treesize of output 32 [2022-11-25 23:54:54,723 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:54,723 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-25 23:54:54,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965404230] [2022-11-25 23:54:54,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965404230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:54:54,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [679926423] [2022-11-25 23:54:54,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 23:54:54,724 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-25 23:54:54,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-25 23:54:54,725 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-25 23:54:54,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-11-25 23:54:56,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-25 23:54:56,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:54:56,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 23:54:56,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:54:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:54:58,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:02,914 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:02,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [679926423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:55:02,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581527031] [2022-11-25 23:55:02,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 23:55:02,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:55:02,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:55:02,915 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:55:02,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3848f1-9c0a-4f74-b35a-956954ea12fb/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-11-25 23:55:06,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-25 23:55:06,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:55:06,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-25 23:55:06,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:55:06,706 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-25 23:55:06,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-25 23:55:09,356 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 7 treesize of output 5 [2022-11-25 23:55:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:55:09,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:55:09,966 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 8 treesize of output 6 [2022-11-25 23:55:09,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-25 23:55:10,002 WARN L207 Elim1Store]: Array PQE input equivalent to true