./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 10:06:12,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:06:12,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:06:12,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:06:12,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:06:12,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:06:12,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:06:12,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:06:12,859 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:06:12,860 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:06:12,861 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:06:12,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:06:12,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:06:12,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:06:12,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:06:12,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:06:12,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:06:12,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:06:12,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:06:12,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:06:12,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:06:12,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:06:12,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:06:12,875 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:06:12,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:06:12,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:06:12,878 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:06:12,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:06:12,878 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:06:12,879 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:06:12,879 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:06:12,880 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:06:12,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:06:12,881 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:06:12,881 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:06:12,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:06:12,882 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:06:12,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:06:12,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:06:12,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:06:12,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:06:12,884 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 10:06:12,904 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:06:12,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:06:12,905 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:06:12,905 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:06:12,905 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:06:12,906 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:06:12,906 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:06:12,906 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:06:12,906 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:06:12,906 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:06:12,906 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:06:12,907 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:06:12,907 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:06:12,907 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:06:12,907 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:06:12,907 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:06:12,907 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:06:12,908 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:06:12,908 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 10:06:12,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 10:06:12,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:06:12,909 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:06:12,909 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 10:06:12,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:06:12,909 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:06:12,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:06:12,910 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 10:06:12,910 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 10:06:12,910 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 10:06:12,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:06:12,910 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 10:06:12,910 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:06:12,911 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:06:12,911 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:06:12,911 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:06:12,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:06:12,911 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:06:12,911 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:06:12,912 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:06:12,912 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:06:12,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:06:12,912 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:06:12,912 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_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca [2022-12-14 10:06:13,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:06:13,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:06:13,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:06:13,099 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:06:13,099 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:06:13,100 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-12-14 10:06:15,739 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:06:15,892 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:06:15,892 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-12-14 10:06:15,897 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/data/dd54e10bf/21ab40628fb24292be31ca53a8539015/FLAG9bede0bab [2022-12-14 10:06:15,908 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/data/dd54e10bf/21ab40628fb24292be31ca53a8539015 [2022-12-14 10:06:15,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:06:15,911 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:06:15,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:06:15,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:06:15,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:06:15,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:06:15" (1/1) ... [2022-12-14 10:06:15,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d57f198 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:15, skipping insertion in model container [2022-12-14 10:06:15,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:06:15" (1/1) ... [2022-12-14 10:06:15,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:06:15,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:06:16,083 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:16,084 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:16,085 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:16,085 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:16,087 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:16,088 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:16,091 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:16,092 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:16,092 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:16,093 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:16,093 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:16,094 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:16,096 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:16,097 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:16,098 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:16,100 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:16,108 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_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2022-12-14 10:06:16,116 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:06:16,125 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-14 10:06:16,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@26ec1225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:16, skipping insertion in model container [2022-12-14 10:06:16,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:06:16,126 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 10:06:16,127 INFO L158 Benchmark]: Toolchain (without parser) took 215.11ms. Allocated memory is still 190.8MB. Free memory was 160.6MB in the beginning and 149.9MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 10:06:16,127 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 102.8MB. Free memory is still 55.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 10:06:16,128 INFO L158 Benchmark]: CACSL2BoogieTranslator took 213.42ms. Allocated memory is still 190.8MB. Free memory was 160.6MB in the beginning and 149.9MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 10:06:16,129 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 102.8MB. Free memory is still 55.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 213.42ms. Allocated memory is still 190.8MB. Free memory was 160.6MB in the beginning and 149.9MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 129]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 10:06:17,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:06:17,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:06:17,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:06:17,393 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:06:17,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:06:17,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:06:17,396 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:06:17,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:06:17,398 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:06:17,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:06:17,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:06:17,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:06:17,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:06:17,401 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:06:17,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:06:17,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:06:17,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:06:17,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:06:17,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:06:17,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:06:17,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:06:17,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:06:17,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:06:17,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:06:17,412 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:06:17,412 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:06:17,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:06:17,413 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:06:17,414 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:06:17,414 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:06:17,415 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:06:17,415 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:06:17,416 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:06:17,417 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:06:17,417 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:06:17,417 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:06:17,417 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:06:17,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:06:17,418 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:06:17,419 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:06:17,419 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 10:06:17,436 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:06:17,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:06:17,437 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:06:17,437 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:06:17,437 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:06:17,437 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:06:17,437 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:06:17,438 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:06:17,438 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:06:17,438 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:06:17,438 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:06:17,438 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:06:17,439 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 10:06:17,439 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 10:06:17,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:06:17,439 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:06:17,439 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 10:06:17,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:06:17,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:06:17,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:06:17,440 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 10:06:17,440 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 10:06:17,440 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 10:06:17,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:06:17,440 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 10:06:17,440 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 10:06:17,440 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 10:06:17,440 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:06:17,440 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:06:17,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:06:17,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 10:06:17,441 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:06:17,441 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:06:17,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:06:17,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:06:17,441 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 10:06:17,441 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 10:06:17,442 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:06:17,442 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 10:06:17,442 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_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ea4ca0f63ee44295abb2f56a10a45cd5c3c9aada41df664ec74c618092ddbca [2022-12-14 10:06:17,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:06:17,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:06:17,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:06:17,665 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:06:17,665 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:06:17,666 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-12-14 10:06:20,305 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:06:20,434 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:06:20,435 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2022-12-14 10:06:20,441 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/data/01ea65d86/5ca71b38f2b24fc4a59d54304135a550/FLAG0647a6837 [2022-12-14 10:06:20,452 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/data/01ea65d86/5ca71b38f2b24fc4a59d54304135a550 [2022-12-14 10:06:20,454 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:06:20,456 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:06:20,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:06:20,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:06:20,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:06:20,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:06:20" (1/1) ... [2022-12-14 10:06:20,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b9bdc60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:20, skipping insertion in model container [2022-12-14 10:06:20,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:06:20" (1/1) ... [2022-12-14 10:06:20,472 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:06:20,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:06:20,640 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:20,641 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:20,641 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:20,642 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:20,644 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:20,645 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:20,647 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:20,648 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:20,648 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:20,648 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:20,649 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:20,650 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:20,652 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:20,654 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:20,655 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:20,657 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:20,664 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_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2022-12-14 10:06:20,671 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:06:20,683 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 10:06:20,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:06:20,692 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:20,693 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:20,693 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:20,693 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:20,694 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:20,695 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:20,696 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:20,696 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:20,696 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:20,697 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:20,698 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:20,699 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:20,700 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:20,701 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:20,702 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:20,702 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:20,706 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_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2022-12-14 10:06:20,710 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:06:20,715 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:06:20,728 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:20,729 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:20,729 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:20,729 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:20,730 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:20,731 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:20,732 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:20,732 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:20,732 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:20,733 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:20,733 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:20,734 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:20,735 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:20,737 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:20,737 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:06:20,738 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:06:20,742 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_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c[3019,3032] [2022-12-14 10:06:20,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:06:20,762 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:06:20,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:20 WrapperNode [2022-12-14 10:06:20,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:06:20,764 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:06:20,764 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:06:20,764 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:06:20,772 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:20" (1/1) ... [2022-12-14 10:06:20,783 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:20" (1/1) ... [2022-12-14 10:06:20,804 INFO L138 Inliner]: procedures = 28, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 135 [2022-12-14 10:06:20,805 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:06:20,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:06:20,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:06:20,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:06:20,815 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:20" (1/1) ... [2022-12-14 10:06:20,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:20" (1/1) ... [2022-12-14 10:06:20,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:20" (1/1) ... [2022-12-14 10:06:20,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:20" (1/1) ... [2022-12-14 10:06:20,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:20" (1/1) ... [2022-12-14 10:06:20,834 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:20" (1/1) ... [2022-12-14 10:06:20,836 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:20" (1/1) ... [2022-12-14 10:06:20,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:20" (1/1) ... [2022-12-14 10:06:20,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:06:20,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:06:20,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:06:20,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:06:20,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:20" (1/1) ... [2022-12-14 10:06:20,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:06:20,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:06:20,871 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:06:20,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:06:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:06:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 10:06:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 10:06:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 10:06:20,904 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 10:06:20,904 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 10:06:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 10:06:20,905 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 10:06:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 10:06:20,905 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 10:06:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-14 10:06:20,905 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-14 10:06:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 10:06:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 10:06:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 10:06:20,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:06:20,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:06:20,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 10:06:20,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 10:06:20,907 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 10:06:21,012 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:06:21,014 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:06:21,491 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:06:21,575 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:06:21,576 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 10:06:21,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:06:21 BoogieIcfgContainer [2022-12-14 10:06:21,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:06:21,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:06:21,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:06:21,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:06:21,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:06:20" (1/3) ... [2022-12-14 10:06:21,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8397a8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:06:21, skipping insertion in model container [2022-12-14 10:06:21,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:06:20" (2/3) ... [2022-12-14 10:06:21,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8397a8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:06:21, skipping insertion in model container [2022-12-14 10:06:21,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:06:21" (3/3) ... [2022-12-14 10:06:21,586 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-dec.wvr.c [2022-12-14 10:06:21,599 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:06:21,600 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2022-12-14 10:06:21,600 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 10:06:21,666 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-14 10:06:21,690 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 10:06:21,701 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 211 places, 210 transitions, 452 flow [2022-12-14 10:06:21,703 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 211 places, 210 transitions, 452 flow [2022-12-14 10:06:21,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 210 transitions, 452 flow [2022-12-14 10:06:21,754 INFO L130 PetriNetUnfolder]: 12/206 cut-off events. [2022-12-14 10:06:21,755 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-14 10:06:21,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 206 events. 12/206 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 289 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2022-12-14 10:06:21,761 INFO L119 LiptonReduction]: Number of co-enabled transitions 4948 [2022-12-14 10:06:46,854 WARN L233 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 127 DAG size of output: 126 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 10:06:53,549 INFO L134 LiptonReduction]: Checked pairs total: 8653 [2022-12-14 10:06:53,550 INFO L136 LiptonReduction]: Total number of compositions: 203 [2022-12-14 10:06:53,555 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 82 places, 73 transitions, 178 flow [2022-12-14 10:06:53,878 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 12050 states, 10104 states have (on average 4.84986144101346) internal successors, (49003), 12049 states have internal predecessors, (49003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:53,894 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:06:53,898 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;@21de6bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:06:53,899 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2022-12-14 10:06:53,926 INFO L276 IsEmpty]: Start isEmpty. Operand has 12050 states, 10104 states have (on average 4.84986144101346) internal successors, (49003), 12049 states have internal predecessors, (49003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:53,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 10:06:53,930 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:06:53,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 10:06:53,931 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:06:53,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:06:53,936 INFO L85 PathProgramCache]: Analyzing trace with hash 27631, now seen corresponding path program 1 times [2022-12-14 10:06:53,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:06:53,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106535243] [2022-12-14 10:06:53,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:06:53,949 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:06:53,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:06:53,976 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:06:53,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 10:06:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:06:54,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 10:06:54,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:06:54,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:06:54,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:06:54,121 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:06:54,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106535243] [2022-12-14 10:06:54,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106535243] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:06:54,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:06:54,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:06:54,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902053024] [2022-12-14 10:06:54,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:06:54,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:06:54,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:06:54,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:06:54,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:06:54,185 INFO L87 Difference]: Start difference. First operand has 12050 states, 10104 states have (on average 4.84986144101346) internal successors, (49003), 12049 states have internal predecessors, (49003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:54,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:06:54,540 INFO L93 Difference]: Finished difference Result 4508 states and 18077 transitions. [2022-12-14 10:06:54,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:06:54,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 10:06:54,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:06:54,604 INFO L225 Difference]: With dead ends: 4508 [2022-12-14 10:06:54,604 INFO L226 Difference]: Without dead ends: 4508 [2022-12-14 10:06:54,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:06:54,608 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:06:54,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:06:54,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4508 states. [2022-12-14 10:06:54,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4508 to 4506. [2022-12-14 10:06:54,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4506 states, 4029 states have (on average 4.486721270786796) internal successors, (18077), 4505 states have internal predecessors, (18077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:54,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4506 states to 4506 states and 18077 transitions. [2022-12-14 10:06:54,914 INFO L78 Accepts]: Start accepts. Automaton has 4506 states and 18077 transitions. Word has length 2 [2022-12-14 10:06:54,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:06:54,915 INFO L495 AbstractCegarLoop]: Abstraction has 4506 states and 18077 transitions. [2022-12-14 10:06:54,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:54,915 INFO L276 IsEmpty]: Start isEmpty. Operand 4506 states and 18077 transitions. [2022-12-14 10:06:54,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 10:06:54,916 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:06:54,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 10:06:54,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:06:55,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:06:55,121 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:06:55,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:06:55,122 INFO L85 PathProgramCache]: Analyzing trace with hash 27540, now seen corresponding path program 1 times [2022-12-14 10:06:55,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:06:55,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1487242938] [2022-12-14 10:06:55,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:06:55,123 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:06:55,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:06:55,125 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:06:55,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 10:06:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:06:55,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:06:55,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:06:55,417 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-14 10:06:55,418 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-14 10:06:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:06:55,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:06:55,441 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:06:55,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1487242938] [2022-12-14 10:06:55,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1487242938] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:06:55,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:06:55,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:06:55,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891874075] [2022-12-14 10:06:55,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:06:55,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:06:55,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:06:55,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:06:55,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:06:55,444 INFO L87 Difference]: Start difference. First operand 4506 states and 18077 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:55,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:06:55,657 INFO L93 Difference]: Finished difference Result 4505 states and 18075 transitions. [2022-12-14 10:06:55,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:06:55,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 10:06:55,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:06:55,711 INFO L225 Difference]: With dead ends: 4505 [2022-12-14 10:06:55,711 INFO L226 Difference]: Without dead ends: 4505 [2022-12-14 10:06:55,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:06:55,713 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:06:55,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 3 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:06:55,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4505 states. [2022-12-14 10:06:55,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4505 to 4505. [2022-12-14 10:06:55,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4505 states, 4029 states have (on average 4.486224869694714) internal successors, (18075), 4504 states have internal predecessors, (18075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:55,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 18075 transitions. [2022-12-14 10:06:55,914 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 18075 transitions. Word has length 2 [2022-12-14 10:06:55,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:06:55,915 INFO L495 AbstractCegarLoop]: Abstraction has 4505 states and 18075 transitions. [2022-12-14 10:06:55,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:55,916 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 18075 transitions. [2022-12-14 10:06:55,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 10:06:55,916 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:06:55,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 10:06:55,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 10:06:56,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:06:56,117 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:06:56,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:06:56,118 INFO L85 PathProgramCache]: Analyzing trace with hash 27541, now seen corresponding path program 1 times [2022-12-14 10:06:56,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:06:56,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671258018] [2022-12-14 10:06:56,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:06:56,119 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:06:56,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:06:56,120 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:06:56,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 10:06:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:06:56,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:06:56,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:06:56,381 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:06:56,382 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:06:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:06:56,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:06:56,413 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:06:56,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [671258018] [2022-12-14 10:06:56,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [671258018] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:06:56,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:06:56,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:06:56,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369337295] [2022-12-14 10:06:56,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:06:56,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:06:56,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:06:56,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:06:56,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:06:56,415 INFO L87 Difference]: Start difference. First operand 4505 states and 18075 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:56,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:06:56,672 INFO L93 Difference]: Finished difference Result 4505 states and 18074 transitions. [2022-12-14 10:06:56,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:06:56,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 10:06:56,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:06:56,708 INFO L225 Difference]: With dead ends: 4505 [2022-12-14 10:06:56,709 INFO L226 Difference]: Without dead ends: 4505 [2022-12-14 10:06:56,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:06:56,710 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:06:56,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:06:56,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4505 states. [2022-12-14 10:06:56,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4505 to 4505. [2022-12-14 10:06:56,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4505 states, 4029 states have (on average 4.485976669148672) internal successors, (18074), 4504 states have internal predecessors, (18074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:56,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 18074 transitions. [2022-12-14 10:06:56,858 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 18074 transitions. Word has length 2 [2022-12-14 10:06:56,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:06:56,859 INFO L495 AbstractCegarLoop]: Abstraction has 4505 states and 18074 transitions. [2022-12-14 10:06:56,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:56,859 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 18074 transitions. [2022-12-14 10:06:56,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 10:06:56,859 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:06:56,859 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 10:06:56,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 10:06:57,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:06:57,062 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:06:57,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:06:57,064 INFO L85 PathProgramCache]: Analyzing trace with hash 856664, now seen corresponding path program 1 times [2022-12-14 10:06:57,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:06:57,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641172532] [2022-12-14 10:06:57,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:06:57,066 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:06:57,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:06:57,070 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:06:57,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 10:06:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:06:57,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 10:06:57,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:06:57,312 INFO L321 Elim1Store]: treesize reduction 210, result has 13.6 percent of original size [2022-12-14 10:06:57,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 73 [2022-12-14 10:06:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:06:57,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:06:57,408 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:06:57,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641172532] [2022-12-14 10:06:57,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641172532] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:06:57,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:06:57,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:06:57,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436632074] [2022-12-14 10:06:57,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:06:57,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:06:57,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:06:57,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:06:57,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:06:57,410 INFO L87 Difference]: Start difference. First operand 4505 states and 18074 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:57,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:06:57,691 INFO L93 Difference]: Finished difference Result 3864 states and 15193 transitions. [2022-12-14 10:06:57,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:06:57,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 10:06:57,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:06:57,712 INFO L225 Difference]: With dead ends: 3864 [2022-12-14 10:06:57,712 INFO L226 Difference]: Without dead ends: 3864 [2022-12-14 10:06:57,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:06:57,714 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:06:57,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 3 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:06:57,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2022-12-14 10:06:57,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 3864. [2022-12-14 10:06:57,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3864 states, 3464 states have (on average 4.3859699769053115) internal successors, (15193), 3863 states have internal predecessors, (15193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:57,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3864 states to 3864 states and 15193 transitions. [2022-12-14 10:06:57,855 INFO L78 Accepts]: Start accepts. Automaton has 3864 states and 15193 transitions. Word has length 3 [2022-12-14 10:06:57,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:06:57,856 INFO L495 AbstractCegarLoop]: Abstraction has 3864 states and 15193 transitions. [2022-12-14 10:06:57,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:57,856 INFO L276 IsEmpty]: Start isEmpty. Operand 3864 states and 15193 transitions. [2022-12-14 10:06:57,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 10:06:57,857 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:06:57,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 10:06:57,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-14 10:06:58,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:06:58,058 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:06:58,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:06:58,058 INFO L85 PathProgramCache]: Analyzing trace with hash 856666, now seen corresponding path program 1 times [2022-12-14 10:06:58,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:06:58,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [847721980] [2022-12-14 10:06:58,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:06:58,059 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:06:58,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:06:58,060 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:06:58,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-14 10:06:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:06:58,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 10:06:58,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:06:58,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:06:58,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:06:58,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:06:58,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:06:58,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:06:58,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:06:58,266 INFO L321 Elim1Store]: treesize reduction 48, result has 43.5 percent of original size [2022-12-14 10:06:58,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 44 [2022-12-14 10:06:58,292 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-12-14 10:06:58,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-12-14 10:06:58,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:06:58,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:06:58,375 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:06:58,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [847721980] [2022-12-14 10:06:58,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [847721980] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:06:58,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:06:58,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:06:58,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567904647] [2022-12-14 10:06:58,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:06:58,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:06:58,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:06:58,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:06:58,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:06:58,377 INFO L87 Difference]: Start difference. First operand 3864 states and 15193 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:58,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:06:58,546 INFO L93 Difference]: Finished difference Result 3223 states and 12312 transitions. [2022-12-14 10:06:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:06:58,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 10:06:58,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:06:58,556 INFO L225 Difference]: With dead ends: 3223 [2022-12-14 10:06:58,556 INFO L226 Difference]: Without dead ends: 3223 [2022-12-14 10:06:58,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:06:58,557 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:06:58,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 3 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:06:58,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2022-12-14 10:06:58,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 3223. [2022-12-14 10:06:58,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3223 states, 2899 states have (on average 4.2469817178337355) internal successors, (12312), 3222 states have internal predecessors, (12312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:58,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3223 states to 3223 states and 12312 transitions. [2022-12-14 10:06:58,616 INFO L78 Accepts]: Start accepts. Automaton has 3223 states and 12312 transitions. Word has length 3 [2022-12-14 10:06:58,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:06:58,616 INFO L495 AbstractCegarLoop]: Abstraction has 3223 states and 12312 transitions. [2022-12-14 10:06:58,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:06:58,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3223 states and 12312 transitions. [2022-12-14 10:06:58,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 10:06:58,617 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:06:58,617 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 10:06:58,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-14 10:06:58,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:06:58,817 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:06:58,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:06:58,818 INFO L85 PathProgramCache]: Analyzing trace with hash 856574, now seen corresponding path program 1 times [2022-12-14 10:06:58,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:06:58,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512344319] [2022-12-14 10:06:58,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:06:58,818 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:06:58,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:06:58,819 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:06:58,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-14 10:06:58,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:06:58,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:06:58,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:06:59,017 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:06:59,017 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:06:59,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:06:59,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:06:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:06:59,254 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:06:59,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512344319] [2022-12-14 10:06:59,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [512344319] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:06:59,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [347931] [2022-12-14 10:06:59,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:06:59,254 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:06:59,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:06:59,256 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:06:59,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-12-14 10:06:59,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:06:59,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:06:59,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:06:59,525 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:06:59,526 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:06:59,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:06:59,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:06:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:06:59,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [347931] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:06:59,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313399195] [2022-12-14 10:06:59,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:06:59,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:06:59,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:06:59,601 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:06:59,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 10:06:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:06:59,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 10:06:59,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:06:59,839 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:06:59,839 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:06:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:06:59,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:00,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:00,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313399195] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:00,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:07:00,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 10:07:00,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424306607] [2022-12-14 10:07:00,005 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:07:00,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 10:07:00,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:07:00,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 10:07:00,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 10:07:00,006 INFO L87 Difference]: Start difference. First operand 3223 states and 12312 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:01,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:01,608 INFO L93 Difference]: Finished difference Result 9664 states and 36932 transitions. [2022-12-14 10:07:01,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 10:07:01,610 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 10:07:01,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:01,641 INFO L225 Difference]: With dead ends: 9664 [2022-12-14 10:07:01,641 INFO L226 Difference]: Without dead ends: 9664 [2022-12-14 10:07:01,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 10:07:01,641 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 305 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:01,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 12 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-14 10:07:01,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9664 states. [2022-12-14 10:07:01,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9664 to 3226. [2022-12-14 10:07:01,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3226 states, 2902 states have (on average 4.244658855961406) internal successors, (12318), 3225 states have internal predecessors, (12318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:01,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3226 states to 3226 states and 12318 transitions. [2022-12-14 10:07:01,760 INFO L78 Accepts]: Start accepts. Automaton has 3226 states and 12318 transitions. Word has length 3 [2022-12-14 10:07:01,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:01,760 INFO L495 AbstractCegarLoop]: Abstraction has 3226 states and 12318 transitions. [2022-12-14 10:07:01,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:01,761 INFO L276 IsEmpty]: Start isEmpty. Operand 3226 states and 12318 transitions. [2022-12-14 10:07:01,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 10:07:01,761 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:01,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 10:07:01,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2022-12-14 10:07:01,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 10:07:02,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-14 10:07:02,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:02,364 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:07:02,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:02,366 INFO L85 PathProgramCache]: Analyzing trace with hash 823275243, now seen corresponding path program 1 times [2022-12-14 10:07:02,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:07:02,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435365316] [2022-12-14 10:07:02,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:02,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:02,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:07:02,370 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:07:02,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-14 10:07:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:02,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 10:07:02,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:02,537 INFO L321 Elim1Store]: treesize reduction 190, result has 14.8 percent of original size [2022-12-14 10:07:02,538 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 7 case distinctions, treesize of input 49 treesize of output 66 [2022-12-14 10:07:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:07:02,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:07:02,618 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:07:02,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435365316] [2022-12-14 10:07:02,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435365316] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:07:02,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:07:02,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:07:02,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391574695] [2022-12-14 10:07:02,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:07:02,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:07:02,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:07:02,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:07:02,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:07:02,620 INFO L87 Difference]: Start difference. First operand 3226 states and 12318 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:02,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:02,777 INFO L93 Difference]: Finished difference Result 3138 states and 12022 transitions. [2022-12-14 10:07:02,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:07:02,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 10:07:02,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:02,785 INFO L225 Difference]: With dead ends: 3138 [2022-12-14 10:07:02,785 INFO L226 Difference]: Without dead ends: 3138 [2022-12-14 10:07:02,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:07:02,786 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:02,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 3 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:07:02,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3138 states. [2022-12-14 10:07:02,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3138 to 3138. [2022-12-14 10:07:02,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3138 states, 2834 states have (on average 4.242060691601976) internal successors, (12022), 3137 states have internal predecessors, (12022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:02,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3138 states to 3138 states and 12022 transitions. [2022-12-14 10:07:02,836 INFO L78 Accepts]: Start accepts. Automaton has 3138 states and 12022 transitions. Word has length 5 [2022-12-14 10:07:02,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:02,837 INFO L495 AbstractCegarLoop]: Abstraction has 3138 states and 12022 transitions. [2022-12-14 10:07:02,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:02,837 INFO L276 IsEmpty]: Start isEmpty. Operand 3138 states and 12022 transitions. [2022-12-14 10:07:02,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 10:07:02,837 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:02,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 10:07:02,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-14 10:07:03,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:03,039 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:07:03,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:03,040 INFO L85 PathProgramCache]: Analyzing trace with hash 823275005, now seen corresponding path program 1 times [2022-12-14 10:07:03,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:07:03,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828980335] [2022-12-14 10:07:03,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:03,042 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:03,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:07:03,045 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:07:03,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-14 10:07:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:03,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 10:07:03,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:03,358 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-14 10:07:03,359 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-14 10:07:03,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:07:03,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:07:03,375 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:07:03,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828980335] [2022-12-14 10:07:03,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828980335] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:07:03,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:07:03,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:07:03,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771914771] [2022-12-14 10:07:03,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:07:03,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:07:03,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:07:03,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:07:03,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:07:03,376 INFO L87 Difference]: Start difference. First operand 3138 states and 12022 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:03,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:03,530 INFO L93 Difference]: Finished difference Result 1508 states and 5686 transitions. [2022-12-14 10:07:03,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:07:03,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 10:07:03,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:03,534 INFO L225 Difference]: With dead ends: 1508 [2022-12-14 10:07:03,534 INFO L226 Difference]: Without dead ends: 1508 [2022-12-14 10:07:03,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:07:03,535 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 87 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:03,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 1 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:07:03,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2022-12-14 10:07:03,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1508. [2022-12-14 10:07:03,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1508 states, 1420 states have (on average 4.004225352112676) internal successors, (5686), 1507 states have internal predecessors, (5686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:03,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1508 states to 1508 states and 5686 transitions. [2022-12-14 10:07:03,578 INFO L78 Accepts]: Start accepts. Automaton has 1508 states and 5686 transitions. Word has length 5 [2022-12-14 10:07:03,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:03,578 INFO L495 AbstractCegarLoop]: Abstraction has 1508 states and 5686 transitions. [2022-12-14 10:07:03,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:03,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1508 states and 5686 transitions. [2022-12-14 10:07:03,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 10:07:03,579 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:03,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 10:07:03,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-12-14 10:07:03,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:03,781 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:07:03,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:03,783 INFO L85 PathProgramCache]: Analyzing trace with hash 823275245, now seen corresponding path program 1 times [2022-12-14 10:07:03,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:07:03,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281236991] [2022-12-14 10:07:03,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:03,786 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:03,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:07:03,789 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:07:03,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-12-14 10:07:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:03,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 10:07:03,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:03,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:07:03,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:07:03,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:07:03,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:07:03,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:07:04,098 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-12-14 10:07:04,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-12-14 10:07:04,120 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 10:07:04,121 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 31 treesize of output 27 [2022-12-14 10:07:04,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:04,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:04,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:04,719 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:07:04,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281236991] [2022-12-14 10:07:04,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281236991] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:04,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1237047183] [2022-12-14 10:07:04,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:04,720 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:07:04,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:07:04,721 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:07:04,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-12-14 10:07:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:04,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:07:04,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:04,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:07:04,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:07:04,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:07:04,993 INFO L321 Elim1Store]: treesize reduction 98, result has 25.2 percent of original size [2022-12-14 10:07:04,993 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 18 treesize of output 43 [2022-12-14 10:07:05,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-12-14 10:07:05,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:07:05,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:07:05,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1237047183] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:07:05,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:07:05,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-12-14 10:07:05,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103458209] [2022-12-14 10:07:05,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:07:05,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:07:05,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:07:05,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:07:05,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-14 10:07:05,160 INFO L87 Difference]: Start difference. First operand 1508 states and 5686 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:05,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:05,327 INFO L93 Difference]: Finished difference Result 1454 states and 5506 transitions. [2022-12-14 10:07:05,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:07:05,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 10:07:05,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:05,332 INFO L225 Difference]: With dead ends: 1454 [2022-12-14 10:07:05,332 INFO L226 Difference]: Without dead ends: 1454 [2022-12-14 10:07:05,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-14 10:07:05,333 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:05,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:07:05,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2022-12-14 10:07:05,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1454. [2022-12-14 10:07:05,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1375 states have (on average 4.004363636363636) internal successors, (5506), 1453 states have internal predecessors, (5506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:05,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 5506 transitions. [2022-12-14 10:07:05,365 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 5506 transitions. Word has length 5 [2022-12-14 10:07:05,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:05,366 INFO L495 AbstractCegarLoop]: Abstraction has 1454 states and 5506 transitions. [2022-12-14 10:07:05,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:05,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 5506 transitions. [2022-12-14 10:07:05,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 10:07:05,366 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:05,366 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 10:07:05,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-12-14 10:07:05,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-12-14 10:07:05,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:07:05,768 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:07:05,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:05,770 INFO L85 PathProgramCache]: Analyzing trace with hash 823275006, now seen corresponding path program 1 times [2022-12-14 10:07:05,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:07:05,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1621927668] [2022-12-14 10:07:05,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:05,772 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:05,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:07:05,773 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:07:05,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-14 10:07:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:05,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 10:07:05,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:05,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:05,966 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 25 treesize of output 21 [2022-12-14 10:07:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:06,017 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:07:06,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1621927668] [2022-12-14 10:07:06,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1621927668] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:06,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1329642891] [2022-12-14 10:07:06,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:06,018 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:07:06,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:07:06,019 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:07:06,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-12-14 10:07:06,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:06,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 10:07:06,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:06,299 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:07:06,300 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:07:06,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:06,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:06,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:06,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1329642891] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:06,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731656298] [2022-12-14 10:07:06,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:06,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:06,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:07:06,664 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:07:06,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 10:07:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:06,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 10:07:06,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:06,902 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:07:06,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:07:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:07,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:07,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:07,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731656298] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:07,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:07:07,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 12 [2022-12-14 10:07:07,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726034978] [2022-12-14 10:07:07,082 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:07:07,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 10:07:07,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:07:07,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 10:07:07,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-12-14 10:07:07,083 INFO L87 Difference]: Start difference. First operand 1454 states and 5506 transitions. Second operand has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:07,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:07,990 INFO L93 Difference]: Finished difference Result 3106 states and 11696 transitions. [2022-12-14 10:07:07,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 10:07:07,991 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 10:07:07,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:08,001 INFO L225 Difference]: With dead ends: 3106 [2022-12-14 10:07:08,001 INFO L226 Difference]: Without dead ends: 3106 [2022-12-14 10:07:08,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-12-14 10:07:08,002 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 470 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:08,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 6 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 10:07:08,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3106 states. [2022-12-14 10:07:08,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3106 to 1040. [2022-12-14 10:07:08,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1001 states have (on average 3.902097902097902) internal successors, (3906), 1039 states have internal predecessors, (3906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:08,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 3906 transitions. [2022-12-14 10:07:08,045 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 3906 transitions. Word has length 5 [2022-12-14 10:07:08,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:08,046 INFO L495 AbstractCegarLoop]: Abstraction has 1040 states and 3906 transitions. [2022-12-14 10:07:08,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:08,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 3906 transitions. [2022-12-14 10:07:08,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 10:07:08,046 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:08,047 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 10:07:08,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-14 10:07:08,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2022-12-14 10:07:08,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 10:07:08,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:08,650 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:07:08,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:08,651 INFO L85 PathProgramCache]: Analyzing trace with hash -248824363, now seen corresponding path program 2 times [2022-12-14 10:07:08,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:07:08,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [858836793] [2022-12-14 10:07:08,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:07:08,652 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:08,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:07:08,653 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:07:08,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-14 10:07:08,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:07:08,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:07:08,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 10:07:08,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:08,926 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:07:08,927 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:07:09,055 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:09,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:09,561 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:07:09,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [858836793] [2022-12-14 10:07:09,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [858836793] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:09,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1614703780] [2022-12-14 10:07:09,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:07:09,561 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:07:09,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:07:09,562 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:07:09,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-12-14 10:07:09,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:07:09,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:07:09,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 10:07:09,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:09,895 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:07:09,895 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:07:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:10,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:10,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1614703780] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:10,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573598638] [2022-12-14 10:07:10,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:07:10,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:10,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:07:10,728 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:07:10,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 10:07:10,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:07:10,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:07:10,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 10:07:10,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:10,975 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:07:10,975 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:07:11,050 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:11,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:11,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573598638] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:11,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:07:11,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 19 [2022-12-14 10:07:11,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245545024] [2022-12-14 10:07:11,179 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:07:11,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 10:07:11,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:07:11,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 10:07:11,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-12-14 10:07:11,180 INFO L87 Difference]: Start difference. First operand 1040 states and 3906 transitions. Second operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:16,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:16,433 INFO L93 Difference]: Finished difference Result 9310 states and 35078 transitions. [2022-12-14 10:07:16,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 10:07:16,435 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 10:07:16,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:16,457 INFO L225 Difference]: With dead ends: 9310 [2022-12-14 10:07:16,458 INFO L226 Difference]: Without dead ends: 9310 [2022-12-14 10:07:16,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=216, Invalid=384, Unknown=0, NotChecked=0, Total=600 [2022-12-14 10:07:16,458 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1400 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1400 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:16,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1400 Valid, 33 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-12-14 10:07:16,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9310 states. [2022-12-14 10:07:16,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9310 to 1046. [2022-12-14 10:07:16,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1007 states have (on average 3.890764647467726) internal successors, (3918), 1045 states have internal predecessors, (3918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3918 transitions. [2022-12-14 10:07:16,518 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3918 transitions. Word has length 6 [2022-12-14 10:07:16,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:16,518 INFO L495 AbstractCegarLoop]: Abstraction has 1046 states and 3918 transitions. [2022-12-14 10:07:16,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:16,519 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3918 transitions. [2022-12-14 10:07:16,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 10:07:16,519 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:16,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:07:16,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-12-14 10:07:16,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 10:07:16,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2022-12-14 10:07:17,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:07:17,122 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:07:17,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:17,123 INFO L85 PathProgramCache]: Analyzing trace with hash 893547065, now seen corresponding path program 1 times [2022-12-14 10:07:17,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:07:17,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21312719] [2022-12-14 10:07:17,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:17,125 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:17,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:07:17,126 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:07:17,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-14 10:07:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:17,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 10:07:17,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:17,283 INFO L321 Elim1Store]: treesize reduction 180, result has 15.5 percent of original size [2022-12-14 10:07:17,284 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 5 case distinctions, treesize of input 36 treesize of output 55 [2022-12-14 10:07:17,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:07:17,307 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:07:17,307 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:07:17,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21312719] [2022-12-14 10:07:17,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21312719] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:07:17,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:07:17,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:07:17,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373605788] [2022-12-14 10:07:17,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:07:17,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:07:17,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:07:17,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:07:17,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:07:17,309 INFO L87 Difference]: Start difference. First operand 1046 states and 3918 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:17,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:17,419 INFO L93 Difference]: Finished difference Result 1013 states and 3823 transitions. [2022-12-14 10:07:17,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:07:17,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 10:07:17,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:17,421 INFO L225 Difference]: With dead ends: 1013 [2022-12-14 10:07:17,422 INFO L226 Difference]: Without dead ends: 1013 [2022-12-14 10:07:17,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:07:17,422 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:17,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:07:17,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-12-14 10:07:17,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1013. [2022-12-14 10:07:17,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 980 states have (on average 3.9010204081632653) internal successors, (3823), 1012 states have internal predecessors, (3823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:17,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3823 transitions. [2022-12-14 10:07:17,436 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3823 transitions. Word has length 7 [2022-12-14 10:07:17,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:17,436 INFO L495 AbstractCegarLoop]: Abstraction has 1013 states and 3823 transitions. [2022-12-14 10:07:17,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:17,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3823 transitions. [2022-12-14 10:07:17,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 10:07:17,437 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:17,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:07:17,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-12-14 10:07:17,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:17,638 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:07:17,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:17,640 INFO L85 PathProgramCache]: Analyzing trace with hash 893547066, now seen corresponding path program 1 times [2022-12-14 10:07:17,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:07:17,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89149884] [2022-12-14 10:07:17,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:17,642 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:17,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:07:17,645 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:07:17,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-14 10:07:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:17,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 10:07:17,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:17,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:07:17,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:07:17,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:07:17,901 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-12-14 10:07:17,901 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 4 case distinctions, treesize of input 20 treesize of output 53 [2022-12-14 10:07:17,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-14 10:07:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:18,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:18,320 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:07:18,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89149884] [2022-12-14 10:07:18,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89149884] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:18,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1476998495] [2022-12-14 10:07:18,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:18,320 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:07:18,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:07:18,321 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:07:18,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-12-14 10:07:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:18,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 10:07:18,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:18,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:07:18,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:07:18,635 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-12-14 10:07:18,636 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 18 treesize of output 53 [2022-12-14 10:07:18,654 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 88 treesize of output 84 [2022-12-14 10:07:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:07:18,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:07:18,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1476998495] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:07:18,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:07:18,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-12-14 10:07:18,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168926720] [2022-12-14 10:07:18,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:07:18,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:07:18,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:07:18,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:07:18,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 10:07:18,742 INFO L87 Difference]: Start difference. First operand 1013 states and 3823 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:18,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:18,866 INFO L93 Difference]: Finished difference Result 980 states and 3728 transitions. [2022-12-14 10:07:18,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:07:18,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 10:07:18,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:18,869 INFO L225 Difference]: With dead ends: 980 [2022-12-14 10:07:18,869 INFO L226 Difference]: Without dead ends: 980 [2022-12-14 10:07:18,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 10:07:18,869 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:18,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:07:18,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2022-12-14 10:07:18,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 980. [2022-12-14 10:07:18,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 953 states have (on average 3.911857292759706) internal successors, (3728), 979 states have internal predecessors, (3728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:18,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 3728 transitions. [2022-12-14 10:07:18,884 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 3728 transitions. Word has length 7 [2022-12-14 10:07:18,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:18,884 INFO L495 AbstractCegarLoop]: Abstraction has 980 states and 3728 transitions. [2022-12-14 10:07:18,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:18,884 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 3728 transitions. [2022-12-14 10:07:18,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 10:07:18,885 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:18,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:07:18,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2022-12-14 10:07:19,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-14 10:07:19,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:19,287 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:07:19,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:19,288 INFO L85 PathProgramCache]: Analyzing trace with hash 893322401, now seen corresponding path program 1 times [2022-12-14 10:07:19,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:07:19,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406798315] [2022-12-14 10:07:19,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:19,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:19,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:07:19,291 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:07:19,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-14 10:07:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:19,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 10:07:19,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:07:19,434 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:07:19,434 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:07:19,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406798315] [2022-12-14 10:07:19,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406798315] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:07:19,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:07:19,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:07:19,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473370444] [2022-12-14 10:07:19,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:07:19,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:07:19,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:07:19,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:07:19,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:07:19,436 INFO L87 Difference]: Start difference. First operand 980 states and 3728 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:19,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:19,730 INFO L93 Difference]: Finished difference Result 1454 states and 5506 transitions. [2022-12-14 10:07:19,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:07:19,731 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 10:07:19,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:19,734 INFO L225 Difference]: With dead ends: 1454 [2022-12-14 10:07:19,734 INFO L226 Difference]: Without dead ends: 1454 [2022-12-14 10:07:19,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-14 10:07:19,735 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 145 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:19,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 6 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:07:19,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2022-12-14 10:07:19,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1152. [2022-12-14 10:07:19,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1125 states have (on average 4.065777777777778) internal successors, (4574), 1151 states have internal predecessors, (4574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:19,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 4574 transitions. [2022-12-14 10:07:19,753 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 4574 transitions. Word has length 7 [2022-12-14 10:07:19,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:19,753 INFO L495 AbstractCegarLoop]: Abstraction has 1152 states and 4574 transitions. [2022-12-14 10:07:19,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:19,753 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 4574 transitions. [2022-12-14 10:07:19,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 10:07:19,754 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:19,754 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:07:19,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-12-14 10:07:19,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:19,955 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:07:19,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:19,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1923194635, now seen corresponding path program 1 times [2022-12-14 10:07:19,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:07:19,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271346628] [2022-12-14 10:07:19,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:19,959 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:19,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:07:19,962 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:07:19,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-14 10:07:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:20,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 10:07:20,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:20,172 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:07:20,172 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:07:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:07:20,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:20,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:07:20,631 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:07:20,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1271346628] [2022-12-14 10:07:20,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1271346628] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:20,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1357781506] [2022-12-14 10:07:20,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:20,632 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:07:20,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:07:20,633 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:07:20,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-12-14 10:07:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:20,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:07:20,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:20,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:20,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:21,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1357781506] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:21,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368466492] [2022-12-14 10:07:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:21,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:21,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:07:21,165 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:07:21,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 10:07:21,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:21,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:07:21,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:21,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:21,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:21,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368466492] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:21,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:07:21,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 20 [2022-12-14 10:07:21,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239260969] [2022-12-14 10:07:21,415 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:07:21,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 10:07:21,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:07:21,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 10:07:21,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-12-14 10:07:21,416 INFO L87 Difference]: Start difference. First operand 1152 states and 4574 transitions. Second operand has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 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) [2022-12-14 10:07:24,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:24,590 INFO L93 Difference]: Finished difference Result 2913 states and 11309 transitions. [2022-12-14 10:07:24,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 10:07:24,591 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 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 8 [2022-12-14 10:07:24,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:24,599 INFO L225 Difference]: With dead ends: 2913 [2022-12-14 10:07:24,599 INFO L226 Difference]: Without dead ends: 2913 [2022-12-14 10:07:24,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=270, Invalid=920, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 10:07:24,600 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 773 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:24,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [773 Valid, 31 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-12-14 10:07:24,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2913 states. [2022-12-14 10:07:24,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2913 to 2357. [2022-12-14 10:07:24,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2357 states, 2330 states have (on average 4.136051502145922) internal successors, (9637), 2356 states have internal predecessors, (9637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:24,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 9637 transitions. [2022-12-14 10:07:24,642 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 9637 transitions. Word has length 8 [2022-12-14 10:07:24,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:24,642 INFO L495 AbstractCegarLoop]: Abstraction has 2357 states and 9637 transitions. [2022-12-14 10:07:24,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 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) [2022-12-14 10:07:24,642 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 9637 transitions. [2022-12-14 10:07:24,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 10:07:24,643 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:24,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:07:24,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 10:07:24,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-12-14 10:07:25,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-12-14 10:07:25,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:07:25,245 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:07:25,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:25,246 INFO L85 PathProgramCache]: Analyzing trace with hash -294907490, now seen corresponding path program 1 times [2022-12-14 10:07:25,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:07:25,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956549314] [2022-12-14 10:07:25,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:25,247 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:25,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:07:25,248 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:07:25,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-14 10:07:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:25,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 10:07:25,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:07:25,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:07:25,438 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:07:25,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956549314] [2022-12-14 10:07:25,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956549314] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:07:25,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:07:25,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:07:25,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202131953] [2022-12-14 10:07:25,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:07:25,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:07:25,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:07:25,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:07:25,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:07:25,439 INFO L87 Difference]: Start difference. First operand 2357 states and 9637 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:25,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:25,715 INFO L93 Difference]: Finished difference Result 3347 states and 13683 transitions. [2022-12-14 10:07:25,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:07:25,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 10:07:25,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:25,723 INFO L225 Difference]: With dead ends: 3347 [2022-12-14 10:07:25,724 INFO L226 Difference]: Without dead ends: 3347 [2022-12-14 10:07:25,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-14 10:07:25,724 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 119 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:25,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 6 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:07:25,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3347 states. [2022-12-14 10:07:25,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3347 to 2815. [2022-12-14 10:07:25,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2815 states, 2788 states have (on average 4.3023672883787665) internal successors, (11995), 2814 states have internal predecessors, (11995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:25,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2815 states to 2815 states and 11995 transitions. [2022-12-14 10:07:25,773 INFO L78 Accepts]: Start accepts. Automaton has 2815 states and 11995 transitions. Word has length 9 [2022-12-14 10:07:25,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:25,773 INFO L495 AbstractCegarLoop]: Abstraction has 2815 states and 11995 transitions. [2022-12-14 10:07:25,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:25,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2815 states and 11995 transitions. [2022-12-14 10:07:25,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 10:07:25,774 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:25,774 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:07:25,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-12-14 10:07:25,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:25,975 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:07:25,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:25,977 INFO L85 PathProgramCache]: Analyzing trace with hash -294707579, now seen corresponding path program 1 times [2022-12-14 10:07:25,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:07:25,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [669209497] [2022-12-14 10:07:25,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:25,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:25,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:07:25,982 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:07:25,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-14 10:07:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:26,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 10:07:26,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:26,201 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-12-14 10:07:26,202 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 4 case distinctions, treesize of input 18 treesize of output 36 [2022-12-14 10:07:26,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:07:26,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:07:26,230 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:07:26,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [669209497] [2022-12-14 10:07:26,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [669209497] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:07:26,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:07:26,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:07:26,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381754979] [2022-12-14 10:07:26,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:07:26,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:07:26,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:07:26,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:07:26,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:07:26,231 INFO L87 Difference]: Start difference. First operand 2815 states and 11995 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:26,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:26,345 INFO L93 Difference]: Finished difference Result 2501 states and 10620 transitions. [2022-12-14 10:07:26,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:07:26,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 10:07:26,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:26,352 INFO L225 Difference]: With dead ends: 2501 [2022-12-14 10:07:26,353 INFO L226 Difference]: Without dead ends: 2501 [2022-12-14 10:07:26,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:07:26,353 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:26,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 1 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:07:26,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2501 states. [2022-12-14 10:07:26,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2501 to 2501. [2022-12-14 10:07:26,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2501 states, 2483 states have (on average 4.27708417237213) internal successors, (10620), 2500 states have internal predecessors, (10620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:26,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2501 states to 2501 states and 10620 transitions. [2022-12-14 10:07:26,392 INFO L78 Accepts]: Start accepts. Automaton has 2501 states and 10620 transitions. Word has length 9 [2022-12-14 10:07:26,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:26,392 INFO L495 AbstractCegarLoop]: Abstraction has 2501 states and 10620 transitions. [2022-12-14 10:07:26,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:26,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2501 states and 10620 transitions. [2022-12-14 10:07:26,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 10:07:26,393 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:26,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:07:26,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-12-14 10:07:26,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:26,594 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:07:26,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:26,595 INFO L85 PathProgramCache]: Analyzing trace with hash -294707577, now seen corresponding path program 1 times [2022-12-14 10:07:26,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:07:26,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876532525] [2022-12-14 10:07:26,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:26,597 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:26,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:07:26,600 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:07:26,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-12-14 10:07:26,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:26,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 10:07:26,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:26,901 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:07:26,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:07:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:27,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:27,318 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:07:27,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876532525] [2022-12-14 10:07:27,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1876532525] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:27,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [148558741] [2022-12-14 10:07:27,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:27,319 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:07:27,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:07:27,320 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:07:27,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-12-14 10:07:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:27,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 10:07:27,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:27,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:07:27,677 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-12-14 10:07:27,677 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 3 case distinctions, treesize of input 18 treesize of output 56 [2022-12-14 10:07:27,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:07:27,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:07:27,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [148558741] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:07:27,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:07:27,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-12-14 10:07:27,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158825706] [2022-12-14 10:07:27,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:07:27,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:07:27,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:07:27,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:07:27,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 10:07:27,782 INFO L87 Difference]: Start difference. First operand 2501 states and 10620 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:27,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:27,896 INFO L93 Difference]: Finished difference Result 2187 states and 9245 transitions. [2022-12-14 10:07:27,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:07:27,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 10:07:27,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:27,903 INFO L225 Difference]: With dead ends: 2187 [2022-12-14 10:07:27,903 INFO L226 Difference]: Without dead ends: 2187 [2022-12-14 10:07:27,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 10:07:27,903 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:27,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 1 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 10:07:27,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2022-12-14 10:07:27,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2022-12-14 10:07:27,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2178 states have (on average 4.244719926538108) internal successors, (9245), 2186 states have internal predecessors, (9245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 9245 transitions. [2022-12-14 10:07:27,938 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 9245 transitions. Word has length 9 [2022-12-14 10:07:27,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:27,938 INFO L495 AbstractCegarLoop]: Abstraction has 2187 states and 9245 transitions. [2022-12-14 10:07:27,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:27,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 9245 transitions. [2022-12-14 10:07:27,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 10:07:27,939 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:27,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:07:27,942 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2022-12-14 10:07:28,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-12-14 10:07:28,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:28,340 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:07:28,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:28,340 INFO L85 PathProgramCache]: Analyzing trace with hash -552193166, now seen corresponding path program 1 times [2022-12-14 10:07:28,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:07:28,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273645563] [2022-12-14 10:07:28,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:28,340 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:28,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:07:28,341 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:07:28,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-12-14 10:07:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:28,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 10:07:28,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:28,580 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:07:28,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:07:28,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:07:28,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:07:29,015 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:07:29,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273645563] [2022-12-14 10:07:29,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273645563] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:29,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1027772135] [2022-12-14 10:07:29,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:29,015 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:07:29,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:07:29,016 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:07:29,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-12-14 10:07:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:29,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:07:29,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:29,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:29,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:29,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1027772135] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:29,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830849583] [2022-12-14 10:07:29,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:29,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:29,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:07:29,498 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:07:29,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 10:07:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:29,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:07:29,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:29,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:29,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:29,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830849583] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:29,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:07:29,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 20 [2022-12-14 10:07:29,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335751133] [2022-12-14 10:07:29,752 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:07:29,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 10:07:29,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:07:29,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 10:07:29,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-12-14 10:07:29,753 INFO L87 Difference]: Start difference. First operand 2187 states and 9245 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:32,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:32,552 INFO L93 Difference]: Finished difference Result 3339 states and 13803 transitions. [2022-12-14 10:07:32,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 10:07:32,553 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 10:07:32,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:32,561 INFO L225 Difference]: With dead ends: 3339 [2022-12-14 10:07:32,561 INFO L226 Difference]: Without dead ends: 3339 [2022-12-14 10:07:32,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=270, Invalid=920, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 10:07:32,562 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 537 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:32,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [537 Valid, 44 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-14 10:07:32,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2022-12-14 10:07:32,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3003. [2022-12-14 10:07:32,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 2994 states have (on average 4.280227120908483) internal successors, (12815), 3002 states have internal predecessors, (12815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:32,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 12815 transitions. [2022-12-14 10:07:32,611 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 12815 transitions. Word has length 10 [2022-12-14 10:07:32,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:32,611 INFO L495 AbstractCegarLoop]: Abstraction has 3003 states and 12815 transitions. [2022-12-14 10:07:32,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:32,612 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 12815 transitions. [2022-12-14 10:07:32,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 10:07:32,612 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:32,612 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:07:32,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-12-14 10:07:32,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-14 10:07:33,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-12-14 10:07:33,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:33,214 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:07:33,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:33,216 INFO L85 PathProgramCache]: Analyzing trace with hash -546005764, now seen corresponding path program 1 times [2022-12-14 10:07:33,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:07:33,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491993296] [2022-12-14 10:07:33,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:33,217 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:33,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:07:33,219 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:07:33,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-12-14 10:07:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:33,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:07:33,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:33,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:33,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:33,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-12-14 10:07:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:33,790 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:07:33,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491993296] [2022-12-14 10:07:33,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491993296] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:33,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1480994942] [2022-12-14 10:07:33,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:33,791 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:07:33,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:07:33,792 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:07:33,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-12-14 10:07:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:33,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 10:07:33,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:34,121 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:07:34,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:07:34,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:34,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:34,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1480994942] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:34,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465886900] [2022-12-14 10:07:34,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:34,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:34,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:07:34,667 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:07:34,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 10:07:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:34,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 10:07:34,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:34,958 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:07:34,959 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:07:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:35,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:35,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:35,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465886900] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:35,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:07:35,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 15 [2022-12-14 10:07:35,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563618814] [2022-12-14 10:07:35,192 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:07:35,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 10:07:35,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:07:35,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 10:07:35,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-12-14 10:07:35,193 INFO L87 Difference]: Start difference. First operand 3003 states and 12815 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:36,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:36,560 INFO L93 Difference]: Finished difference Result 7828 states and 34182 transitions. [2022-12-14 10:07:36,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 10:07:36,561 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 10:07:36,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:36,581 INFO L225 Difference]: With dead ends: 7828 [2022-12-14 10:07:36,581 INFO L226 Difference]: Without dead ends: 7828 [2022-12-14 10:07:36,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2022-12-14 10:07:36,582 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 508 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:36,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 6 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 10:07:36,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7828 states. [2022-12-14 10:07:36,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7828 to 3689. [2022-12-14 10:07:36,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3689 states, 3680 states have (on average 4.483967391304348) internal successors, (16501), 3688 states have internal predecessors, (16501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:36,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3689 states to 3689 states and 16501 transitions. [2022-12-14 10:07:36,675 INFO L78 Accepts]: Start accepts. Automaton has 3689 states and 16501 transitions. Word has length 10 [2022-12-14 10:07:36,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:36,675 INFO L495 AbstractCegarLoop]: Abstraction has 3689 states and 16501 transitions. [2022-12-14 10:07:36,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:36,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3689 states and 16501 transitions. [2022-12-14 10:07:36,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 10:07:36,676 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:36,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:07:36,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Ended with exit code 0 [2022-12-14 10:07:36,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-12-14 10:07:37,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-14 10:07:37,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:37,278 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:07:37,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:37,280 INFO L85 PathProgramCache]: Analyzing trace with hash 253694703, now seen corresponding path program 1 times [2022-12-14 10:07:37,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:07:37,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900284249] [2022-12-14 10:07:37,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:37,282 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:37,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:07:37,283 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:07:37,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-12-14 10:07:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:37,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 10:07:37,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:37,603 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:07:37,604 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:07:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:07:37,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:07:38,100 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:07:38,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900284249] [2022-12-14 10:07:38,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900284249] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:38,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1820178746] [2022-12-14 10:07:38,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:38,100 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:07:38,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:07:38,101 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:07:38,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-12-14 10:07:38,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:38,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:07:38,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:38,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:38,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:38,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1820178746] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:38,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681289547] [2022-12-14 10:07:38,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:07:38,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:38,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:07:38,661 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:07:38,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 10:07:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:07:38,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 10:07:38,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:38,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:38,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681289547] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:38,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:07:38,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 20 [2022-12-14 10:07:38,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315727606] [2022-12-14 10:07:38,912 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:07:38,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 10:07:38,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:07:38,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 10:07:38,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-12-14 10:07:38,913 INFO L87 Difference]: Start difference. First operand 3689 states and 16501 transitions. Second operand has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:42,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:07:42,253 INFO L93 Difference]: Finished difference Result 5703 states and 25919 transitions. [2022-12-14 10:07:42,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 10:07:42,254 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 10:07:42,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:07:42,268 INFO L225 Difference]: With dead ends: 5703 [2022-12-14 10:07:42,269 INFO L226 Difference]: Without dead ends: 5703 [2022-12-14 10:07:42,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=270, Invalid=920, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 10:07:42,269 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 655 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:07:42,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 6 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 10:07:42,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5703 states. [2022-12-14 10:07:42,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5703 to 5151. [2022-12-14 10:07:42,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5151 states, 5142 states have (on average 4.666472189809412) internal successors, (23995), 5150 states have internal predecessors, (23995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:42,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5151 states to 5151 states and 23995 transitions. [2022-12-14 10:07:42,368 INFO L78 Accepts]: Start accepts. Automaton has 5151 states and 23995 transitions. Word has length 11 [2022-12-14 10:07:42,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:07:42,368 INFO L495 AbstractCegarLoop]: Abstraction has 5151 states and 23995 transitions. [2022-12-14 10:07:42,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:07:42,369 INFO L276 IsEmpty]: Start isEmpty. Operand 5151 states and 23995 transitions. [2022-12-14 10:07:42,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 10:07:42,370 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:07:42,370 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 10:07:42,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-12-14 10:07:42,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2022-12-14 10:07:42,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-14 10:07:42,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:42,972 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:07:42,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:07:42,973 INFO L85 PathProgramCache]: Analyzing trace with hash -449524008, now seen corresponding path program 2 times [2022-12-14 10:07:42,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:07:42,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071064505] [2022-12-14 10:07:42,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:07:42,975 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:07:42,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:07:42,977 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:07:42,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-12-14 10:07:43,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:07:43,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:07:43,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 10:07:43,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:43,273 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:07:43,273 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:07:43,543 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:43,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:07:44,801 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:07:44,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071064505] [2022-12-14 10:07:44,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071064505] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:44,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [525330538] [2022-12-14 10:07:44,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:07:44,802 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:07:44,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:07:44,802 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:07:44,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-12-14 10:07:45,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:07:45,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:07:45,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 10:07:45,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:07:45,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:07:46,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [525330538] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:46,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887858684] [2022-12-14 10:07:46,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:07:46,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:07:46,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:07:46,155 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:07:46,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 10:07:46,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:07:46,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:07:46,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 10:07:46,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:07:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:07:46,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:07:46,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:07:46,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887858684] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:07:46,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:07:46,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 33 [2022-12-14 10:07:46,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200556081] [2022-12-14 10:07:46,428 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:07:46,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 10:07:46,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:07:46,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 10:07:46,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 10:07:46,430 INFO L87 Difference]: Start difference. First operand 5151 states and 23995 transitions. Second operand has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:10,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:08:10,198 INFO L93 Difference]: Finished difference Result 17473 states and 78443 transitions. [2022-12-14 10:08:10,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 10:08:10,200 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 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 12 [2022-12-14 10:08:10,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:08:10,256 INFO L225 Difference]: With dead ends: 17473 [2022-12-14 10:08:10,257 INFO L226 Difference]: Without dead ends: 17473 [2022-12-14 10:08:10,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=836, Invalid=2824, Unknown=0, NotChecked=0, Total=3660 [2022-12-14 10:08:10,258 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1573 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 3011 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1573 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 3033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 3011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:08:10,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1573 Valid, 155 Invalid, 3033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 3011 Invalid, 0 Unknown, 0 Unchecked, 14.4s Time] [2022-12-14 10:08:10,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17473 states. [2022-12-14 10:08:10,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17473 to 9209. [2022-12-14 10:08:10,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9209 states, 9200 states have (on average 4.707282608695652) internal successors, (43307), 9208 states have internal predecessors, (43307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:10,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9209 states to 9209 states and 43307 transitions. [2022-12-14 10:08:10,503 INFO L78 Accepts]: Start accepts. Automaton has 9209 states and 43307 transitions. Word has length 12 [2022-12-14 10:08:10,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:08:10,503 INFO L495 AbstractCegarLoop]: Abstraction has 9209 states and 43307 transitions. [2022-12-14 10:08:10,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:10,503 INFO L276 IsEmpty]: Start isEmpty. Operand 9209 states and 43307 transitions. [2022-12-14 10:08:10,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 10:08:10,504 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:08:10,504 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 10:08:10,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-12-14 10:08:10,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-14 10:08:10,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-12-14 10:08:11,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:08:11,107 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:08:11,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:08:11,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1395170613, now seen corresponding path program 3 times [2022-12-14 10:08:11,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:08:11,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968701029] [2022-12-14 10:08:11,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:08:11,110 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:08:11,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:08:11,112 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:08:11,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-12-14 10:08:11,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 10:08:11,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:08:11,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:08:11,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:11,465 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:08:11,466 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:08:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:08:11,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:08:14,147 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:08:14,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968701029] [2022-12-14 10:08:14,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1968701029] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:08:14,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [235444605] [2022-12-14 10:08:14,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:08:14,147 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:08:14,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:08:14,148 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:08:14,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-12-14 10:08:14,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 10:08:14,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:08:14,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 10:08:14,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:14,996 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:08:14,996 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:08:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:08:15,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:08:15,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [235444605] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:08:15,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25106234] [2022-12-14 10:08:15,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:08:15,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:08:15,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:08:15,958 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:08:15,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-14 10:08:18,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 10:08:18,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:08:18,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:08:18,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:18,206 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:08:18,206 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:08:18,311 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:08:18,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:08:18,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25106234] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:08:18,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:08:18,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 32 [2022-12-14 10:08:18,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491587895] [2022-12-14 10:08:18,629 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:08:18,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 10:08:18,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:08:18,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 10:08:18,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 10:08:18,631 INFO L87 Difference]: Start difference. First operand 9209 states and 43307 transitions. Second operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:40,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:08:40,983 INFO L93 Difference]: Finished difference Result 88688 states and 433062 transitions. [2022-12-14 10:08:40,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 10:08:40,983 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 10:08:40,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:08:41,411 INFO L225 Difference]: With dead ends: 88688 [2022-12-14 10:08:41,411 INFO L226 Difference]: Without dead ends: 88688 [2022-12-14 10:08:41,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=646, Invalid=1246, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 10:08:41,412 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4569 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 5296 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4569 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 5298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:08:41,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4569 Valid, 166 Invalid, 5298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5296 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time] [2022-12-14 10:08:41,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88688 states. [2022-12-14 10:08:42,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88688 to 9221. [2022-12-14 10:08:42,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9221 states, 9212 states have (on average 4.703755970473296) internal successors, (43331), 9220 states have internal predecessors, (43331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:42,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9221 states to 9221 states and 43331 transitions. [2022-12-14 10:08:42,463 INFO L78 Accepts]: Start accepts. Automaton has 9221 states and 43331 transitions. Word has length 12 [2022-12-14 10:08:42,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:08:42,464 INFO L495 AbstractCegarLoop]: Abstraction has 9221 states and 43331 transitions. [2022-12-14 10:08:42,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:08:42,464 INFO L276 IsEmpty]: Start isEmpty. Operand 9221 states and 43331 transitions. [2022-12-14 10:08:42,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 10:08:42,466 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:08:42,467 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:08:42,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-12-14 10:08:42,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-14 10:08:42,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-12-14 10:08:43,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:08:43,069 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:08:43,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:08:43,070 INFO L85 PathProgramCache]: Analyzing trace with hash -228830059, now seen corresponding path program 2 times [2022-12-14 10:08:43,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:08:43,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [46259230] [2022-12-14 10:08:43,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:08:43,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:08:43,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:08:43,073 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:08:43,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-12-14 10:08:43,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:08:43,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:08:43,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 10:08:43,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:43,454 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:08:43,454 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:08:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:08:43,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:45,067 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:08:45,068 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:08:45,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [46259230] [2022-12-14 10:08:45,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [46259230] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:08:45,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [618911774] [2022-12-14 10:08:45,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:08:45,068 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:08:45,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:08:45,069 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:08:45,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-12-14 10:08:45,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:08:45,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:08:45,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 10:08:45,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:45,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:46,421 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:46,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [618911774] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:08:46,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696263538] [2022-12-14 10:08:46,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:08:46,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:08:46,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:08:46,422 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:08:46,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-14 10:08:46,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:08:46,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:08:46,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 10:08:46,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:08:46,743 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:08:46,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:08:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:47,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:08:47,439 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 [2022-12-14 10:08:47,457 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 [2022-12-14 10:08:47,464 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 10:08:49,028 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:08:49,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696263538] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:08:49,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:08:49,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 47 [2022-12-14 10:08:49,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774874183] [2022-12-14 10:08:49,029 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:08:49,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 10:08:49,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:08:49,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 10:08:49,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1930, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 10:08:49,031 INFO L87 Difference]: Start difference. First operand 9221 states and 43331 transitions. Second operand has 48 states, 48 states have (on average 1.625) internal successors, (78), 47 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:09:23,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:09:23,623 INFO L93 Difference]: Finished difference Result 15825 states and 70771 transitions. [2022-12-14 10:09:23,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-14 10:09:23,625 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 47 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 10:09:23,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:09:23,669 INFO L225 Difference]: With dead ends: 15825 [2022-12-14 10:09:23,669 INFO L226 Difference]: Without dead ends: 15825 [2022-12-14 10:09:23,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=990, Invalid=5172, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 10:09:23,670 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1844 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 4837 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1844 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 4869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 4837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.9s IncrementalHoareTripleChecker+Time [2022-12-14 10:09:23,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1844 Valid, 246 Invalid, 4869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 4837 Invalid, 0 Unknown, 0 Unchecked, 20.9s Time] [2022-12-14 10:09:23,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15825 states. [2022-12-14 10:09:23,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15825 to 10379. [2022-12-14 10:09:23,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10379 states, 10370 states have (on average 4.646383799421408) internal successors, (48183), 10378 states have internal predecessors, (48183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:09:23,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10379 states to 10379 states and 48183 transitions. [2022-12-14 10:09:23,900 INFO L78 Accepts]: Start accepts. Automaton has 10379 states and 48183 transitions. Word has length 14 [2022-12-14 10:09:23,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:09:23,900 INFO L495 AbstractCegarLoop]: Abstraction has 10379 states and 48183 transitions. [2022-12-14 10:09:23,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 47 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:09:23,900 INFO L276 IsEmpty]: Start isEmpty. Operand 10379 states and 48183 transitions. [2022-12-14 10:09:23,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 10:09:23,902 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:09:23,902 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 10:09:23,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-12-14 10:09:24,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-12-14 10:09:24,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (47)] Ended with exit code 0 [2022-12-14 10:09:24,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:09:24,505 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:09:24,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:09:24,506 INFO L85 PathProgramCache]: Analyzing trace with hash -621704789, now seen corresponding path program 3 times [2022-12-14 10:09:24,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:09:24,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752794974] [2022-12-14 10:09:24,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:09:24,507 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:09:24,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:09:24,509 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:09:24,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-12-14 10:09:24,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 10:09:24,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:09:24,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 10:09:24,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:24,933 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:09:24,933 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:09:25,285 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:09:25,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:25,564 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 10:09:25,608 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 [2022-12-14 10:09:27,747 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:27,748 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:09:27,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752794974] [2022-12-14 10:09:27,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752794974] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:27,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [881490914] [2022-12-14 10:09:27,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:09:27,748 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:09:27,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:09:27,749 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:09:27,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-12-14 10:09:28,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 10:09:28,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:09:28,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 10:09:28,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:28,844 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:09:28,845 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:09:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:29,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:29,822 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 [2022-12-14 10:09:29,828 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 [2022-12-14 10:09:29,844 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 10:09:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:09:32,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [881490914] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:32,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119666874] [2022-12-14 10:09:32,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:09:32,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:09:32,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:09:32,127 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:09:32,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-14 10:09:32,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 10:09:32,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:09:32,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 10:09:32,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:09:33,407 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:09:33,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:09:35,069 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:09:35,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119666874] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:09:35,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:09:35,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11, 11, 10, 10] total 59 [2022-12-14 10:09:35,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021533366] [2022-12-14 10:09:35,070 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:09:35,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-12-14 10:09:35,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:09:35,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-12-14 10:09:35,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=3189, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 10:09:35,072 INFO L87 Difference]: Start difference. First operand 10379 states and 48183 transitions. Second operand has 60 states, 60 states have (on average 1.3) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:10:33,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:10:33,516 INFO L93 Difference]: Finished difference Result 22179 states and 100585 transitions. [2022-12-14 10:10:33,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 10:10:33,519 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.3) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 10:10:33,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:10:33,594 INFO L225 Difference]: With dead ends: 22179 [2022-12-14 10:10:33,594 INFO L226 Difference]: Without dead ends: 22179 [2022-12-14 10:10:33,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2596 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=1206, Invalid=7536, Unknown=0, NotChecked=0, Total=8742 [2022-12-14 10:10:33,596 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 3032 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 8049 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3032 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 8089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 8049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:10:33,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3032 Valid, 417 Invalid, 8089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 8049 Invalid, 0 Unknown, 0 Unchecked, 38.2s Time] [2022-12-14 10:10:33,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22179 states. [2022-12-14 10:10:33,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22179 to 16255. [2022-12-14 10:10:33,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16255 states, 16246 states have (on average 4.77415979317986) internal successors, (77561), 16254 states have internal predecessors, (77561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:10:33,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16255 states to 16255 states and 77561 transitions. [2022-12-14 10:10:33,979 INFO L78 Accepts]: Start accepts. Automaton has 16255 states and 77561 transitions. Word has length 14 [2022-12-14 10:10:33,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:10:33,979 INFO L495 AbstractCegarLoop]: Abstraction has 16255 states and 77561 transitions. [2022-12-14 10:10:33,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.3) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:10:33,979 INFO L276 IsEmpty]: Start isEmpty. Operand 16255 states and 77561 transitions. [2022-12-14 10:10:33,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 10:10:33,982 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:10:33,982 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:10:33,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-12-14 10:10:34,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-12-14 10:10:34,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-12-14 10:10:34,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:10:34,584 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:10:34,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:10:34,586 INFO L85 PathProgramCache]: Analyzing trace with hash -916630875, now seen corresponding path program 2 times [2022-12-14 10:10:34,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:10:34,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1128961416] [2022-12-14 10:10:34,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:10:34,588 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:10:34,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:10:34,589 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:10:34,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-12-14 10:10:34,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:10:34,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:10:34,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 10:10:34,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:34,984 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:10:34,984 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:10:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:10:35,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:10:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:10:36,613 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:10:36,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1128961416] [2022-12-14 10:10:36,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1128961416] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:10:36,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [28360496] [2022-12-14 10:10:36,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:10:36,614 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:10:36,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:10:36,614 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:10:36,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-12-14 10:10:37,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:10:37,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:10:37,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 10:10:37,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:10:37,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:10:38,376 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:10:38,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [28360496] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:10:38,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809928285] [2022-12-14 10:10:38,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:10:38,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:10:38,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:10:38,377 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:10:38,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-14 10:10:38,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:10:38,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:10:38,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 10:10:38,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:10:38,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:10:38,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:10:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:10:38,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809928285] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:10:38,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:10:38,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 32 [2022-12-14 10:10:38,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537913669] [2022-12-14 10:10:38,836 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:10:38,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 10:10:38,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:10:38,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 10:10:38,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 10:10:38,838 INFO L87 Difference]: Start difference. First operand 16255 states and 77561 transitions. Second operand has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:11:01,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:11:01,936 INFO L93 Difference]: Finished difference Result 19981 states and 90465 transitions. [2022-12-14 10:11:01,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 10:11:01,938 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 10:11:01,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:11:01,996 INFO L225 Difference]: With dead ends: 19981 [2022-12-14 10:11:01,996 INFO L226 Difference]: Without dead ends: 19981 [2022-12-14 10:11:01,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=538, Invalid=2884, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 10:11:01,997 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1170 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 4321 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1170 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 4343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 4321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:11:01,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1170 Valid, 18 Invalid, 4343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 4321 Invalid, 0 Unknown, 0 Unchecked, 14.8s Time] [2022-12-14 10:11:02,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19981 states. [2022-12-14 10:11:02,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19981 to 16451. [2022-12-14 10:11:02,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16451 states, 16442 states have (on average 4.7460771195718285) internal successors, (78035), 16450 states have internal predecessors, (78035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:11:02,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16451 states to 16451 states and 78035 transitions. [2022-12-14 10:11:02,409 INFO L78 Accepts]: Start accepts. Automaton has 16451 states and 78035 transitions. Word has length 15 [2022-12-14 10:11:02,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:11:02,409 INFO L495 AbstractCegarLoop]: Abstraction has 16451 states and 78035 transitions. [2022-12-14 10:11:02,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:11:02,409 INFO L276 IsEmpty]: Start isEmpty. Operand 16451 states and 78035 transitions. [2022-12-14 10:11:02,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 10:11:02,415 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:11:02,415 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:11:02,423 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-12-14 10:11:02,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2022-12-14 10:11:02,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Ended with exit code 0 [2022-12-14 10:11:03,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:11:03,017 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:11:03,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:11:03,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1096227730, now seen corresponding path program 3 times [2022-12-14 10:11:03,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:11:03,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [331768668] [2022-12-14 10:11:03,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:11:03,020 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:11:03,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:11:03,023 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:11:03,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-12-14 10:11:03,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 10:11:03,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:11:03,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 10:11:03,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:11:03,537 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:11:03,537 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:11:03,880 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 [2022-12-14 10:11:03,888 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:11:03,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:11:04,055 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 [2022-12-14 10:11:04,070 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 [2022-12-14 10:11:04,080 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 10:11:05,869 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:11:05,870 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:11:05,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [331768668] [2022-12-14 10:11:05,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [331768668] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:11:05,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [262546221] [2022-12-14 10:11:05,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:11:05,870 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:11:05,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:11:05,871 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:11:05,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-12-14 10:11:06,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 10:11:06,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:11:06,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 10:11:06,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:11:06,975 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:11:06,975 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:11:07,872 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:11:07,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:11:07,882 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 [2022-12-14 10:11:07,894 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 [2022-12-14 10:11:07,900 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 10:11:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:11:10,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [262546221] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:11:10,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355191756] [2022-12-14 10:11:10,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:11:10,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:11:10,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:11:10,071 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:11:10,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-14 10:11:10,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 10:11:10,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:11:10,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 10:11:10,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:11:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:11:11,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:11:13,271 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:11:13,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355191756] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:11:13,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:11:13,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11, 11, 10, 10] total 59 [2022-12-14 10:11:13,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669348371] [2022-12-14 10:11:13,272 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:11:13,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-12-14 10:11:13,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:11:13,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-12-14 10:11:13,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=3214, Unknown=0, NotChecked=0, Total=3540 [2022-12-14 10:11:13,273 INFO L87 Difference]: Start difference. First operand 16451 states and 78035 transitions. Second operand has 60 states, 60 states have (on average 1.5) internal successors, (90), 59 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:12:15,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:12:15,841 INFO L93 Difference]: Finished difference Result 18657 states and 81789 transitions. [2022-12-14 10:12:15,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 10:12:15,844 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 59 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 10:12:15,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:12:15,900 INFO L225 Difference]: With dead ends: 18657 [2022-12-14 10:12:15,900 INFO L226 Difference]: Without dead ends: 18657 [2022-12-14 10:12:15,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2352 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=1104, Invalid=7452, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 10:12:15,901 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 2309 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 9072 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2309 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 9110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 9072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:12:15,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2309 Valid, 481 Invalid, 9110 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [38 Valid, 9072 Invalid, 0 Unknown, 0 Unchecked, 43.4s Time] [2022-12-14 10:12:15,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18657 states. [2022-12-14 10:12:16,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18657 to 15727. [2022-12-14 10:12:16,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15727 states, 15718 states have (on average 4.583852907494593) internal successors, (72049), 15726 states have internal predecessors, (72049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:12:16,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15727 states to 15727 states and 72049 transitions. [2022-12-14 10:12:16,293 INFO L78 Accepts]: Start accepts. Automaton has 15727 states and 72049 transitions. Word has length 16 [2022-12-14 10:12:16,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:12:16,293 INFO L495 AbstractCegarLoop]: Abstraction has 15727 states and 72049 transitions. [2022-12-14 10:12:16,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 59 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:12:16,293 INFO L276 IsEmpty]: Start isEmpty. Operand 15727 states and 72049 transitions. [2022-12-14 10:12:16,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 10:12:16,297 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:12:16,297 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 10:12:16,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-12-14 10:12:16,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2022-12-14 10:12:16,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-12-14 10:12:16,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:12:16,899 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:12:16,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:12:16,900 INFO L85 PathProgramCache]: Analyzing trace with hash -618944821, now seen corresponding path program 4 times [2022-12-14 10:12:16,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:12:16,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1009667837] [2022-12-14 10:12:16,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:12:16,902 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:12:16,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:12:16,905 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:12:16,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-12-14 10:12:17,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:12:17,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:12:17,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 10:12:17,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:12:17,275 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:12:17,275 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:12:17,668 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:12:17,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:12:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:12:19,870 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:12:19,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1009667837] [2022-12-14 10:12:19,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1009667837] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:12:19,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [98454632] [2022-12-14 10:12:19,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:12:19,871 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:12:19,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:12:19,872 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:12:19,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-12-14 10:12:20,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:12:20,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:12:20,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 10:12:20,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:12:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:12:21,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:12:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:12:22,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [98454632] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:12:22,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666550740] [2022-12-14 10:12:22,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:12:22,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:12:22,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:12:22,985 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:12:22,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-12-14 10:12:23,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:12:23,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:12:23,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 10:12:23,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:12:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:12:24,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:12:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:12:25,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666550740] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:12:25,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:12:25,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13, 13, 13, 13] total 68 [2022-12-14 10:12:25,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325407917] [2022-12-14 10:12:25,595 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:12:25,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-12-14 10:12:25,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:12:25,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-12-14 10:12:25,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=4144, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 10:12:25,597 INFO L87 Difference]: Start difference. First operand 15727 states and 72049 transitions. Second operand has 70 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 69 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:13:12,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:13:12,488 INFO L93 Difference]: Finished difference Result 23885 states and 106375 transitions. [2022-12-14 10:13:12,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-14 10:13:12,490 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 69 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 10:13:12,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:13:12,584 INFO L225 Difference]: With dead ends: 23885 [2022-12-14 10:13:12,584 INFO L226 Difference]: Without dead ends: 23885 [2022-12-14 10:13:12,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4343 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=2365, Invalid=12641, Unknown=0, NotChecked=0, Total=15006 [2022-12-14 10:13:12,587 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 4537 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 14350 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4537 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 14416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 14350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:13:12,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4537 Valid, 792 Invalid, 14416 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [66 Valid, 14350 Invalid, 0 Unknown, 0 Unchecked, 25.3s Time] [2022-12-14 10:13:12,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23885 states. [2022-12-14 10:13:12,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23885 to 19875. [2022-12-14 10:13:12,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19875 states, 19866 states have (on average 4.618393234672304) internal successors, (91749), 19874 states have internal predecessors, (91749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:13:13,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19875 states to 19875 states and 91749 transitions. [2022-12-14 10:13:13,026 INFO L78 Accepts]: Start accepts. Automaton has 19875 states and 91749 transitions. Word has length 16 [2022-12-14 10:13:13,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:13:13,027 INFO L495 AbstractCegarLoop]: Abstraction has 19875 states and 91749 transitions. [2022-12-14 10:13:13,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 69 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:13:13,027 INFO L276 IsEmpty]: Start isEmpty. Operand 19875 states and 91749 transitions. [2022-12-14 10:13:13,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 10:13:13,036 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:13:13,036 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:13:13,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-12-14 10:13:13,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 0 [2022-12-14 10:13:13,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-12-14 10:13:13,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:13:13,637 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:13:13,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:13:13,639 INFO L85 PathProgramCache]: Analyzing trace with hash 2134756623, now seen corresponding path program 3 times [2022-12-14 10:13:13,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:13:13,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [928788141] [2022-12-14 10:13:13,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:13:13,642 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:13:13,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:13:13,645 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:13:13,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-12-14 10:13:13,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 10:13:13,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:13:13,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 10:13:14,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:13:14,148 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:13:14,148 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:13:14,496 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:13:14,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:13:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:13:15,680 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:13:15,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [928788141] [2022-12-14 10:13:15,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [928788141] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:13:15,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1126695477] [2022-12-14 10:13:15,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:13:15,680 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:13:15,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:13:15,681 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:13:15,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-12-14 10:13:16,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 10:13:16,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:13:16,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 10:13:16,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:13:16,800 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:13:16,800 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:13:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:13:17,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:13:18,592 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:13:18,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1126695477] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:13:18,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079182008] [2022-12-14 10:13:18,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:13:18,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:13:18,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:13:18,593 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:13:18,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-12-14 10:13:20,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 10:13:20,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:13:20,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 10:13:20,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:13:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:13:21,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:13:22,207 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:13:22,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079182008] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:13:22,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:13:22,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10, 10, 10, 10] total 53 [2022-12-14 10:13:22,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634026564] [2022-12-14 10:13:22,208 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:13:22,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-14 10:13:22,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:13:22,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-14 10:13:22,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=2578, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 10:13:22,209 INFO L87 Difference]: Start difference. First operand 19875 states and 91749 transitions. Second operand has 54 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 53 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:14:05,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:14:05,013 INFO L93 Difference]: Finished difference Result 22405 states and 97375 transitions. [2022-12-14 10:14:05,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-14 10:14:05,015 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 53 states have internal predecessors, (90), 0 states have call successors, (0), 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 17 [2022-12-14 10:14:05,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:14:05,079 INFO L225 Difference]: With dead ends: 22405 [2022-12-14 10:14:05,079 INFO L226 Difference]: Without dead ends: 22405 [2022-12-14 10:14:05,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=1065, Invalid=6245, Unknown=0, NotChecked=0, Total=7310 [2022-12-14 10:14:05,080 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 2286 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 9586 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2286 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 9617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 9586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:14:05,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2286 Valid, 41 Invalid, 9617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 9586 Invalid, 0 Unknown, 0 Unchecked, 33.4s Time] [2022-12-14 10:14:05,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22405 states. [2022-12-14 10:14:05,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22405 to 19417. [2022-12-14 10:14:05,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19417 states, 19408 states have (on average 4.574762984336356) internal successors, (88787), 19416 states have internal predecessors, (88787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:14:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19417 states to 19417 states and 88787 transitions. [2022-12-14 10:14:05,466 INFO L78 Accepts]: Start accepts. Automaton has 19417 states and 88787 transitions. Word has length 17 [2022-12-14 10:14:05,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:14:05,466 INFO L495 AbstractCegarLoop]: Abstraction has 19417 states and 88787 transitions. [2022-12-14 10:14:05,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 53 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:14:05,467 INFO L276 IsEmpty]: Start isEmpty. Operand 19417 states and 88787 transitions. [2022-12-14 10:14:05,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 10:14:05,470 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:14:05,471 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:14:05,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-12-14 10:14:05,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-12-14 10:14:05,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2022-12-14 10:14:06,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:14:06,072 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:14:06,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:14:06,072 INFO L85 PathProgramCache]: Analyzing trace with hash -831071867, now seen corresponding path program 4 times [2022-12-14 10:14:06,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:14:06,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003865635] [2022-12-14 10:14:06,073 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:14:06,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:14:06,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:14:06,074 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:14:06,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-12-14 10:14:06,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:14:06,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:14:06,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:14:06,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:14:06,464 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:14:06,464 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:14:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:14:06,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:14:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:14:07,851 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:14:07,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003865635] [2022-12-14 10:14:07,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003865635] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:14:07,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1849209374] [2022-12-14 10:14:07,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:14:07,852 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:14:07,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:14:07,852 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:14:07,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-12-14 10:14:08,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:14:08,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:14:08,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 10:14:08,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:14:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:14:08,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:14:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:14:10,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1849209374] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:14:10,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412955998] [2022-12-14 10:14:10,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:14:10,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:14:10,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:14:10,040 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:14:10,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-12-14 10:14:10,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:14:10,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:14:10,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 10:14:10,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:14:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:14:10,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:14:10,871 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:14:10,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412955998] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:14:10,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:14:10,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 11, 11, 11, 11] total 42 [2022-12-14 10:14:10,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134254148] [2022-12-14 10:14:10,871 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:14:10,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 10:14:10,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:14:10,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 10:14:10,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1630, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 10:14:10,872 INFO L87 Difference]: Start difference. First operand 19417 states and 88787 transitions. Second operand has 44 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:14:41,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:14:41,942 INFO L93 Difference]: Finished difference Result 41027 states and 181631 transitions. [2022-12-14 10:14:41,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-12-14 10:14:41,943 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 0 states have call successors, (0), 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 17 [2022-12-14 10:14:41,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:14:42,079 INFO L225 Difference]: With dead ends: 41027 [2022-12-14 10:14:42,079 INFO L226 Difference]: Without dead ends: 41027 [2022-12-14 10:14:42,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2437 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=1508, Invalid=7048, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 10:14:42,080 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4965 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 7832 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4965 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 7908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 7832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:14:42,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4965 Valid, 33 Invalid, 7908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 7832 Invalid, 0 Unknown, 0 Unchecked, 15.2s Time] [2022-12-14 10:14:42,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41027 states. [2022-12-14 10:14:42,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41027 to 27717. [2022-12-14 10:14:42,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27717 states, 27708 states have (on average 4.872058611231413) internal successors, (134995), 27716 states have internal predecessors, (134995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:14:42,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27717 states to 27717 states and 134995 transitions. [2022-12-14 10:14:42,772 INFO L78 Accepts]: Start accepts. Automaton has 27717 states and 134995 transitions. Word has length 17 [2022-12-14 10:14:42,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:14:42,772 INFO L495 AbstractCegarLoop]: Abstraction has 27717 states and 134995 transitions. [2022-12-14 10:14:42,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:14:42,772 INFO L276 IsEmpty]: Start isEmpty. Operand 27717 states and 134995 transitions. [2022-12-14 10:14:42,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 10:14:42,779 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:14:42,779 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:14:42,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-12-14 10:14:42,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-12-14 10:14:43,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (65)] Ended with exit code 0 [2022-12-14 10:14:43,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:14:43,382 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:14:43,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:14:43,383 INFO L85 PathProgramCache]: Analyzing trace with hash -546410318, now seen corresponding path program 4 times [2022-12-14 10:14:43,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:14:43,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1596536929] [2022-12-14 10:14:43,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:14:43,385 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:14:43,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:14:43,386 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:14:43,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-12-14 10:14:43,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:14:43,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:14:43,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 10:14:43,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:14:43,748 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:14:43,749 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:14:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:14:44,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:14:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:14:46,451 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:14:46,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1596536929] [2022-12-14 10:14:46,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1596536929] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:14:46,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2014344910] [2022-12-14 10:14:46,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:14:46,451 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:14:46,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:14:46,452 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:14:46,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-12-14 10:14:46,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:14:46,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:14:46,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 10:14:46,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:14:47,792 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:14:47,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:14:49,564 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:14:49,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2014344910] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:14:49,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262091560] [2022-12-14 10:14:49,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 10:14:49,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:14:49,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:14:49,565 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:14:49,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-12-14 10:14:49,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 10:14:49,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:14:49,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 10:14:49,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:14:50,897 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:14:50,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:14:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:14:52,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262091560] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:14:52,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:14:52,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13, 13, 13, 13] total 68 [2022-12-14 10:14:52,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737993386] [2022-12-14 10:14:52,175 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:14:52,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-12-14 10:14:52,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:14:52,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-12-14 10:14:52,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=4144, Unknown=0, NotChecked=0, Total=4830 [2022-12-14 10:14:52,176 INFO L87 Difference]: Start difference. First operand 27717 states and 134995 transitions. Second operand has 70 states, 69 states have (on average 1.391304347826087) internal successors, (96), 69 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:15:41,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:15:41,022 INFO L93 Difference]: Finished difference Result 45459 states and 219793 transitions. [2022-12-14 10:15:41,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-12-14 10:15:41,025 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.391304347826087) internal successors, (96), 69 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 10:15:41,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:15:41,205 INFO L225 Difference]: With dead ends: 45459 [2022-12-14 10:15:41,205 INFO L226 Difference]: Without dead ends: 45459 [2022-12-14 10:15:41,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4343 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=2365, Invalid=12641, Unknown=0, NotChecked=0, Total=15006 [2022-12-14 10:15:41,206 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 3333 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 14839 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3333 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 14903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 14839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:15:41,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3333 Valid, 830 Invalid, 14903 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [64 Valid, 14839 Invalid, 0 Unknown, 0 Unchecked, 26.6s Time] [2022-12-14 10:15:41,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45459 states. [2022-12-14 10:15:41,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45459 to 39225. [2022-12-14 10:15:41,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39225 states, 39216 states have (on average 5.009103427172582) internal successors, (196437), 39224 states have internal predecessors, (196437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:15:42,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39225 states to 39225 states and 196437 transitions. [2022-12-14 10:15:42,283 INFO L78 Accepts]: Start accepts. Automaton has 39225 states and 196437 transitions. Word has length 18 [2022-12-14 10:15:42,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:15:42,283 INFO L495 AbstractCegarLoop]: Abstraction has 39225 states and 196437 transitions. [2022-12-14 10:15:42,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 1.391304347826087) internal successors, (96), 69 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:15:42,284 INFO L276 IsEmpty]: Start isEmpty. Operand 39225 states and 196437 transitions. [2022-12-14 10:15:42,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 10:15:42,300 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:15:42,300 INFO L195 NwaCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:15:42,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (68)] Forceful destruction successful, exit code 0 [2022-12-14 10:15:42,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-12-14 10:15:42,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-12-14 10:15:42,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:15:42,903 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:15:42,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:15:42,904 INFO L85 PathProgramCache]: Analyzing trace with hash -665835748, now seen corresponding path program 5 times [2022-12-14 10:15:42,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:15:42,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954526854] [2022-12-14 10:15:42,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 10:15:42,906 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:15:42,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:15:42,908 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:15:42,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-12-14 10:15:43,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-14 10:15:43,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:15:43,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 10:15:43,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:15:43,467 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:15:43,467 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:15:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:15:44,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:15:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:15:47,937 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:15:47,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954526854] [2022-12-14 10:15:47,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954526854] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:15:47,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2030204812] [2022-12-14 10:15:47,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 10:15:47,937 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:15:47,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:15:47,938 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:15:47,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-12-14 10:15:53,628 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-14 10:15:53,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:15:53,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 10:15:53,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:15:55,321 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:15:55,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:15:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:15:57,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2030204812] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:15:57,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907241544] [2022-12-14 10:15:57,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 10:15:57,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:15:57,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:15:57,765 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:15:57,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-12-14 10:18:52,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-14 10:18:52,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:18:53,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 10:18:53,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:18:53,180 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:18:53,181 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:18:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:18:55,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:19:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:19:00,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907241544] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:19:00,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:19:00,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 14, 14, 16, 16] total 90 [2022-12-14 10:19:00,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636578924] [2022-12-14 10:19:00,105 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:19:00,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-12-14 10:19:00,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:19:00,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-12-14 10:19:00,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=699, Invalid=7491, Unknown=0, NotChecked=0, Total=8190 [2022-12-14 10:19:00,106 INFO L87 Difference]: Start difference. First operand 39225 states and 196437 transitions. Second operand has 91 states, 91 states have (on average 1.3956043956043955) internal successors, (127), 90 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:21:01,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:21:01,082 INFO L93 Difference]: Finished difference Result 72530 states and 345928 transitions. [2022-12-14 10:21:01,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-12-14 10:21:01,085 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.3956043956043955) internal successors, (127), 90 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 10:21:01,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:21:01,516 INFO L225 Difference]: With dead ends: 72530 [2022-12-14 10:21:01,516 INFO L226 Difference]: Without dead ends: 72530 [2022-12-14 10:21:01,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6273 ImplicationChecksByTransitivity, 55.8s TimeCoverageRelationStatistics Valid=3175, Invalid=20387, Unknown=0, NotChecked=0, Total=23562 [2022-12-14 10:21:01,518 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7867 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 25390 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7867 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 25499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 25390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:21:01,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7867 Valid, 88 Invalid, 25499 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [109 Valid, 25390 Invalid, 0 Unknown, 0 Unchecked, 78.4s Time] [2022-12-14 10:21:01,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72530 states. [2022-12-14 10:21:02,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72530 to 51858. [2022-12-14 10:21:02,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51858 states, 51849 states have (on average 5.173175953248857) internal successors, (268224), 51857 states have internal predecessors, (268224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:21:03,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51858 states to 51858 states and 268224 transitions. [2022-12-14 10:21:03,099 INFO L78 Accepts]: Start accepts. Automaton has 51858 states and 268224 transitions. Word has length 24 [2022-12-14 10:21:03,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:21:03,099 INFO L495 AbstractCegarLoop]: Abstraction has 51858 states and 268224 transitions. [2022-12-14 10:21:03,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.3956043956043955) internal successors, (127), 90 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:21:03,100 INFO L276 IsEmpty]: Start isEmpty. Operand 51858 states and 268224 transitions. [2022-12-14 10:21:03,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 10:21:03,168 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:21:03,168 INFO L195 NwaCegarLoop]: trace histogram [12, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 10:21:03,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (71)] Ended with exit code 0 [2022-12-14 10:21:03,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-12-14 10:21:03,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2022-12-14 10:21:03,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:21:03,769 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2022-12-14 10:21:03,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:21:03,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1540931352, now seen corresponding path program 5 times [2022-12-14 10:21:03,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:21:03,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825304414] [2022-12-14 10:21:03,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 10:21:03,771 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:21:03,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:21:03,772 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:21:03,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-12-14 10:21:04,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-12-14 10:21:04,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:21:04,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 10:21:04,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:04,350 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-12-14 10:21:04,350 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-12-14 10:21:04,971 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 46 treesize of output 10 [2022-12-14 10:21:04,977 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 [2022-12-14 10:21:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 49 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:21:04,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:21:05,717 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 [2022-12-14 10:21:05,730 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 [2022-12-14 10:21:05,746 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-12-14 10:21:11,051 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:21:11,051 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:21:11,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825304414] [2022-12-14 10:21:11,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [825304414] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:21:11,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1945513294] [2022-12-14 10:21:11,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-14 10:21:11,052 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:21:11,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:21:11,053 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:21:11,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fef9f5b1-4f93-4e94-8a76-b17d33a77e81/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (74)] Waiting until timeout for monitored process [2022-12-14 10:21:12,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-12-14 10:21:12,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:21:12,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 10:21:12,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:21:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 42 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 10:21:14,486 INFO L328 TraceCheckSpWp]: Computing backward predicates...