./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS --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 b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 --- 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-8393723 [2022-11-19 08:12:15,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:12:15,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:12:15,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:12:15,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:12:15,807 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:12:15,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:12:15,813 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:12:15,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:12:15,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:12:15,823 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:12:15,825 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:12:15,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:12:15,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:12:15,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:12:15,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:12:15,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:12:15,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:12:15,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:12:15,839 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:12:15,841 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:12:15,843 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:12:15,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:12:15,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:12:15,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:12:15,858 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:12:15,858 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:12:15,860 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:12:15,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:12:15,861 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:12:15,862 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:12:15,863 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:12:15,865 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:12:15,867 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:12:15,869 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:12:15,870 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:12:15,871 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:12:15,871 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:12:15,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:12:15,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:12:15,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:12:15,874 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 08:12:15,916 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:12:15,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:12:15,917 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:12:15,918 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:12:15,919 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:12:15,919 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:12:15,919 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:12:15,919 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:12:15,920 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:12:15,920 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:12:15,921 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:12:15,921 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:12:15,922 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:12:15,922 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:12:15,922 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:12:15,922 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:12:15,923 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:12:15,923 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:12:15,924 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 08:12:15,924 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 08:12:15,924 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:12:15,924 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:12:15,925 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 08:12:15,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:12:15,926 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:12:15,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:12:15,927 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 08:12:15,927 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 08:12:15,927 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 08:12:15,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:12:15,928 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 08:12:15,928 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:12:15,929 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:12:15,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:12:15,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:12:15,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:12:15,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:12:15,930 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:12:15,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:12:15,930 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:12:15,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:12:15,931 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:12:15,931 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_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 [2022-11-19 08:12:16,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:12:16,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:12:16,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:12:16,275 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:12:16,279 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:12:16,281 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2022-11-19 08:12:16,346 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/data/1fddc7c2e/a80551d213ef479681fb6aff5f36516e/FLAGed9c259b6 [2022-11-19 08:12:16,865 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:12:16,866 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2022-11-19 08:12:16,880 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/data/1fddc7c2e/a80551d213ef479681fb6aff5f36516e/FLAGed9c259b6 [2022-11-19 08:12:17,216 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/data/1fddc7c2e/a80551d213ef479681fb6aff5f36516e [2022-11-19 08:12:17,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:12:17,220 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:12:17,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:12:17,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:12:17,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:12:17,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:12:17" (1/1) ... [2022-11-19 08:12:17,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69d9166b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:17, skipping insertion in model container [2022-11-19 08:12:17,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:12:17" (1/1) ... [2022-11-19 08:12:17,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:12:17,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:12:17,489 WARN L234 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_99803fab-8ddc-4a55-bf0f-32df9715ab58/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c[2975,2988] [2022-11-19 08:12:17,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:12:17,512 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-19 08:12:17,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@9477a63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:17, skipping insertion in model container [2022-11-19 08:12:17,512 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:12:17,513 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-19 08:12:17,514 INFO L158 Benchmark]: Toolchain (without parser) took 293.15ms. Allocated memory is still 94.4MB. Free memory was 58.9MB in the beginning and 70.3MB in the end (delta: -11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 08:12:17,515 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 94.4MB. Free memory is still 75.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:12:17,515 INFO L158 Benchmark]: CACSL2BoogieTranslator took 290.84ms. Allocated memory is still 94.4MB. Free memory was 58.7MB in the beginning and 70.3MB in the end (delta: -11.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 08:12:17,517 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 94.4MB. Free memory is still 75.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 290.84ms. Allocated memory is still 94.4MB. Free memory was 58.7MB in the beginning and 70.3MB in the end (delta: -11.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 124]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS --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 b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 --- 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-8393723 [2022-11-19 08:12:19,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:12:19,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:12:19,654 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:12:19,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:12:19,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:12:19,665 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:12:19,669 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:12:19,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:12:19,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:12:19,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:12:19,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:12:19,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:12:19,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:12:19,687 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:12:19,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:12:19,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:12:19,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:12:19,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:12:19,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:12:19,697 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:12:19,701 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:12:19,703 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:12:19,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:12:19,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:12:19,714 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:12:19,714 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:12:19,715 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:12:19,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:12:19,716 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:12:19,716 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:12:19,717 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:12:19,718 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:12:19,718 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:12:19,719 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:12:19,720 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:12:19,720 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:12:19,720 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:12:19,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:12:19,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:12:19,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:12:19,733 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-19 08:12:19,768 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:12:19,768 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:12:19,769 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:12:19,770 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:12:19,771 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:12:19,771 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:12:19,771 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:12:19,771 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:12:19,771 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:12:19,772 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:12:19,773 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:12:19,773 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:12:19,774 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 08:12:19,774 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 08:12:19,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:12:19,775 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:12:19,775 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 08:12:19,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:12:19,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:12:19,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:12:19,776 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 08:12:19,776 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 08:12:19,776 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 08:12:19,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:12:19,776 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 08:12:19,776 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 08:12:19,777 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 08:12:19,777 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:12:19,777 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:12:19,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:12:19,778 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 08:12:19,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:12:19,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:12:19,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:12:19,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:12:19,779 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 08:12:19,779 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 08:12:19,779 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:12:19,779 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 08:12:19,780 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_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2b2bb654bf56c4e17e833d277e8505998c0901a0fe529242a0e0db923034741 [2022-11-19 08:12:20,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:12:20,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:12:20,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:12:20,156 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:12:20,157 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:12:20,159 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2022-11-19 08:12:20,245 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/data/5c21446a2/1d19476534a8491b9b5947f7a68fccf6/FLAG55d3bfb5e [2022-11-19 08:12:20,734 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:12:20,734 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c [2022-11-19 08:12:20,746 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/data/5c21446a2/1d19476534a8491b9b5947f7a68fccf6/FLAG55d3bfb5e [2022-11-19 08:12:21,078 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/data/5c21446a2/1d19476534a8491b9b5947f7a68fccf6 [2022-11-19 08:12:21,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:12:21,083 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:12:21,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:12:21,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:12:21,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:12:21,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:12:21" (1/1) ... [2022-11-19 08:12:21,096 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e0f70e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:21, skipping insertion in model container [2022-11-19 08:12:21,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:12:21" (1/1) ... [2022-11-19 08:12:21,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:12:21,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:12:21,402 WARN L234 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_99803fab-8ddc-4a55-bf0f-32df9715ab58/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c[2975,2988] [2022-11-19 08:12:21,443 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:12:21,465 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-19 08:12:21,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:12:21,506 WARN L234 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_99803fab-8ddc-4a55-bf0f-32df9715ab58/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c[2975,2988] [2022-11-19 08:12:21,515 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:12:21,525 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:12:21,571 WARN L234 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_99803fab-8ddc-4a55-bf0f-32df9715ab58/sv-benchmarks/c/weaver/unroll-cond-5.wvr.c[2975,2988] [2022-11-19 08:12:21,578 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:12:21,598 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:12:21,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:21 WrapperNode [2022-11-19 08:12:21,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:12:21,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:12:21,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:12:21,600 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:12:21,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:21" (1/1) ... [2022-11-19 08:12:21,631 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:21" (1/1) ... [2022-11-19 08:12:21,675 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 202 [2022-11-19 08:12:21,676 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:12:21,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:12:21,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:12:21,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:12:21,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:21" (1/1) ... [2022-11-19 08:12:21,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:21" (1/1) ... [2022-11-19 08:12:21,695 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:21" (1/1) ... [2022-11-19 08:12:21,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:21" (1/1) ... [2022-11-19 08:12:21,705 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:21" (1/1) ... [2022-11-19 08:12:21,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:21" (1/1) ... [2022-11-19 08:12:21,711 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:21" (1/1) ... [2022-11-19 08:12:21,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:21" (1/1) ... [2022-11-19 08:12:21,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:12:21,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:12:21,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:12:21,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:12:21,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:21" (1/1) ... [2022-11-19 08:12:21,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:12:21,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:12:21,761 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:12:21,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:12:21,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:12:21,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 08:12:21,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:12:21,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-19 08:12:21,800 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-19 08:12:21,800 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-19 08:12:21,800 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-19 08:12:21,800 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-19 08:12:21,800 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 08:12:21,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:12:21,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:12:21,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:12:21,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-19 08:12:21,802 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-19 08:12:21,968 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:12:21,970 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:12:22,649 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:12:22,658 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:12:22,659 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-19 08:12:22,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:12:22 BoogieIcfgContainer [2022-11-19 08:12:22,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:12:22,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:12:22,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:12:22,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:12:22,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:12:21" (1/3) ... [2022-11-19 08:12:22,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@499e9ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:12:22, skipping insertion in model container [2022-11-19 08:12:22,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:12:21" (2/3) ... [2022-11-19 08:12:22,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@499e9ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:12:22, skipping insertion in model container [2022-11-19 08:12:22,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:12:22" (3/3) ... [2022-11-19 08:12:22,670 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-5.wvr.c [2022-11-19 08:12:22,690 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:12:22,690 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2022-11-19 08:12:22,690 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-19 08:12:22,863 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-19 08:12:22,917 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 08:12:22,935 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 284 places, 301 transitions, 618 flow [2022-11-19 08:12:22,939 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 284 places, 301 transitions, 618 flow [2022-11-19 08:12:22,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 284 places, 301 transitions, 618 flow [2022-11-19 08:12:23,128 INFO L130 PetriNetUnfolder]: 24/299 cut-off events. [2022-11-19 08:12:23,128 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-19 08:12:23,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 299 events. 24/299 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 689 event pairs, 0 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 195. Up to 2 conditions per place. [2022-11-19 08:12:23,147 INFO L119 LiptonReduction]: Number of co-enabled transitions 10684 [2022-11-19 08:13:44,321 WARN L233 SmtUtils]: Spent 5.57s on a formula simplification. DAG size of input: 262 DAG size of output: 228 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-19 08:14:10,455 INFO L134 LiptonReduction]: Checked pairs total: 10040 [2022-11-19 08:14:10,456 INFO L136 LiptonReduction]: Total number of compositions: 362 [2022-11-19 08:14:10,463 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 51 transitions, 118 flow [2022-11-19 08:14:10,512 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 534 states, 314 states have (on average 4.375796178343949) internal successors, (1374), 533 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:10,529 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:14:10,535 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;@70b5a6ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:14:10,535 INFO L358 AbstractCegarLoop]: Starting to check reachability of 54 error locations. [2022-11-19 08:14:10,538 INFO L276 IsEmpty]: Start isEmpty. Operand has 534 states, 314 states have (on average 4.375796178343949) internal successors, (1374), 533 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:10,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 08:14:10,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:10,543 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 08:14:10,544 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:14:10,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:10,549 INFO L85 PathProgramCache]: Analyzing trace with hash 40788, now seen corresponding path program 1 times [2022-11-19 08:14:10,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:14:10,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [697933834] [2022-11-19 08:14:10,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:10,562 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:10,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:14:10,567 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:14:10,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-19 08:14:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:10,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:14:10,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:10,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:14:10,818 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:14:10,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [697933834] [2022-11-19 08:14:10,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [697933834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:10,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:14:10,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:14:10,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488935137] [2022-11-19 08:14:10,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:10,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:10,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:14:10,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:10,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:10,871 INFO L87 Difference]: Start difference. First operand has 534 states, 314 states have (on average 4.375796178343949) internal successors, (1374), 533 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:11,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:11,752 INFO L93 Difference]: Finished difference Result 440 states and 1124 transitions. [2022-11-19 08:14:11,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:11,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 08:14:11,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:11,782 INFO L225 Difference]: With dead ends: 440 [2022-11-19 08:14:11,785 INFO L226 Difference]: Without dead ends: 440 [2022-11-19 08:14:11,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:11,794 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:11,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:14:11,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-11-19 08:14:11,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 438. [2022-11-19 08:14:11,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 263 states have (on average 4.273764258555133) internal successors, (1124), 437 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:11,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1124 transitions. [2022-11-19 08:14:11,897 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1124 transitions. Word has length 2 [2022-11-19 08:14:11,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:11,897 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 1124 transitions. [2022-11-19 08:14:11,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:11,898 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1124 transitions. [2022-11-19 08:14:11,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 08:14:11,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:11,908 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 08:14:11,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 08:14:12,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:12,121 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:14:12,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:12,122 INFO L85 PathProgramCache]: Analyzing trace with hash 40580, now seen corresponding path program 1 times [2022-11-19 08:14:12,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:14:12,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300268458] [2022-11-19 08:14:12,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:12,123 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 [2022-11-19 08:14:12,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:14:12,125 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:14:12,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-19 08:14:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:12,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:14:12,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:12,340 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 08:14:12,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 08:14:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:12,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:14:12,362 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:14:12,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300268458] [2022-11-19 08:14:12,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300268458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:12,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:14:12,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:14:12,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850059825] [2022-11-19 08:14:12,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:12,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:12,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:14:12,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:12,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:12,366 INFO L87 Difference]: Start difference. First operand 438 states and 1124 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:12,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:12,902 INFO L93 Difference]: Finished difference Result 437 states and 1122 transitions. [2022-11-19 08:14:12,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:12,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 08:14:12,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:12,906 INFO L225 Difference]: With dead ends: 437 [2022-11-19 08:14:12,906 INFO L226 Difference]: Without dead ends: 437 [2022-11-19 08:14:12,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:12,930 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:12,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 2 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:14:12,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-11-19 08:14:12,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 437. [2022-11-19 08:14:12,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 263 states have (on average 4.266159695817491) internal successors, (1122), 436 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:12,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1122 transitions. [2022-11-19 08:14:12,970 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1122 transitions. Word has length 2 [2022-11-19 08:14:12,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:12,970 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 1122 transitions. [2022-11-19 08:14:12,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:12,973 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1122 transitions. [2022-11-19 08:14:12,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 08:14:12,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:12,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 08:14:12,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:13,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:13,185 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:14:13,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:13,187 INFO L85 PathProgramCache]: Analyzing trace with hash 40581, now seen corresponding path program 1 times [2022-11-19 08:14:13,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:14:13,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40928059] [2022-11-19 08:14:13,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:13,189 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:13,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:14:13,191 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:14:13,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-19 08:14:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:13,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:14:13,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:13,363 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 08:14:13,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 08:14:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:13,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:14:13,428 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:14:13,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40928059] [2022-11-19 08:14:13,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40928059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:13,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:14:13,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:14:13,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063831961] [2022-11-19 08:14:13,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:13,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:13,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:14:13,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:13,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:13,430 INFO L87 Difference]: Start difference. First operand 437 states and 1122 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:14,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:14,052 INFO L93 Difference]: Finished difference Result 437 states and 1121 transitions. [2022-11-19 08:14:14,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:14,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 08:14:14,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:14,056 INFO L225 Difference]: With dead ends: 437 [2022-11-19 08:14:14,056 INFO L226 Difference]: Without dead ends: 437 [2022-11-19 08:14:14,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:14,057 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:14,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 39 Unchecked, 0.6s Time] [2022-11-19 08:14:14,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-11-19 08:14:14,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 437. [2022-11-19 08:14:14,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 263 states have (on average 4.262357414448669) internal successors, (1121), 436 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:14,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1121 transitions. [2022-11-19 08:14:14,074 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1121 transitions. Word has length 2 [2022-11-19 08:14:14,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:14,075 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 1121 transitions. [2022-11-19 08:14:14,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:14,075 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1121 transitions. [2022-11-19 08:14:14,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 08:14:14,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:14,076 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 08:14:14,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:14,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:14,287 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:14:14,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:14,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1264265, now seen corresponding path program 1 times [2022-11-19 08:14:14,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:14:14,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1034026735] [2022-11-19 08:14:14,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:14,288 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:14,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:14:14,290 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:14:14,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-19 08:14:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:14,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:14:14,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:14,442 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-19 08:14:14,443 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 3 case distinctions, treesize of input 22 treesize of output 29 [2022-11-19 08:14:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:14:14,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:14:14,504 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:14:14,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1034026735] [2022-11-19 08:14:14,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1034026735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:14,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:14:14,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:14:14,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108618501] [2022-11-19 08:14:14,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:14,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:14,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:14:14,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:14,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:14,506 INFO L87 Difference]: Start difference. First operand 437 states and 1121 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:14,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:14,999 INFO L93 Difference]: Finished difference Result 436 states and 1120 transitions. [2022-11-19 08:14:15,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:15,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 08:14:15,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:15,003 INFO L225 Difference]: With dead ends: 436 [2022-11-19 08:14:15,003 INFO L226 Difference]: Without dead ends: 436 [2022-11-19 08:14:15,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:15,005 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:15,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 38 Unchecked, 0.5s Time] [2022-11-19 08:14:15,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-11-19 08:14:15,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 436. [2022-11-19 08:14:15,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 263 states have (on average 4.258555133079848) internal successors, (1120), 435 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:15,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1120 transitions. [2022-11-19 08:14:15,027 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1120 transitions. Word has length 3 [2022-11-19 08:14:15,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:15,028 INFO L495 AbstractCegarLoop]: Abstraction has 436 states and 1120 transitions. [2022-11-19 08:14:15,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:15,029 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1120 transitions. [2022-11-19 08:14:15,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 08:14:15,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:15,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 08:14:15,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:15,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:15,242 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:14:15,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:15,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1264266, now seen corresponding path program 1 times [2022-11-19 08:14:15,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:14:15,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [993802674] [2022-11-19 08:14:15,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:15,243 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:15,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:14:15,245 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:14:15,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-19 08:14:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:15,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:14:15,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:15,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:15,456 INFO L321 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2022-11-19 08:14:15,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 26 [2022-11-19 08:14:15,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 08:14:15,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:15,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:15,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:15,871 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:14:15,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [993802674] [2022-11-19 08:14:15,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [993802674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:15,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1482551701] [2022-11-19 08:14:15,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:15,871 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:14:15,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:14:15,874 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:14:15,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-19 08:14:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:16,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:14:16,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:16,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:16,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:16,117 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:14:16,117 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 1 case distinctions, treesize of input 12 treesize of output 20 [2022-11-19 08:14:16,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-19 08:14:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:14:16,229 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:14:16,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1482551701] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:16,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:14:16,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [2, 2] total 5 [2022-11-19 08:14:16,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892112542] [2022-11-19 08:14:16,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:16,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:16,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:14:16,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:16,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:14:16,231 INFO L87 Difference]: Start difference. First operand 436 states and 1120 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:16,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:16,807 INFO L93 Difference]: Finished difference Result 435 states and 1119 transitions. [2022-11-19 08:14:16,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:16,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 08:14:16,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:16,811 INFO L225 Difference]: With dead ends: 435 [2022-11-19 08:14:16,811 INFO L226 Difference]: Without dead ends: 435 [2022-11-19 08:14:16,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:14:16,812 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:16,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 37 Unchecked, 0.6s Time] [2022-11-19 08:14:16,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-19 08:14:16,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 435. [2022-11-19 08:14:16,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 263 states have (on average 4.254752851711027) internal successors, (1119), 434 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1119 transitions. [2022-11-19 08:14:16,830 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1119 transitions. Word has length 3 [2022-11-19 08:14:16,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:16,831 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 1119 transitions. [2022-11-19 08:14:16,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:16,831 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1119 transitions. [2022-11-19 08:14:16,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 08:14:16,832 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:16,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 08:14:16,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:17,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:17,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:17,235 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:14:17,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:17,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1264058, now seen corresponding path program 1 times [2022-11-19 08:14:17,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:14:17,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318066955] [2022-11-19 08:14:17,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:17,235 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:17,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:14:17,236 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:14:17,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-19 08:14:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:17,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:14:17,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:17,442 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 08:14:17,443 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 08:14:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:17,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:17,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:17,843 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:14:17,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318066955] [2022-11-19 08:14:17,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318066955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:17,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1686594829] [2022-11-19 08:14:17,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:17,844 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:14:17,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:14:17,845 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:14:17,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-19 08:14:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:18,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:14:18,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:18,117 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 08:14:18,118 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 08:14:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:18,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:18,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1686594829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:18,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513712498] [2022-11-19 08:14:18,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:18,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:18,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:18,274 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:14:18,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 08:14:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:18,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:14:18,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:18,475 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 08:14:18,476 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 08:14:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:18,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:18,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:18,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513712498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:18,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:14:18,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-19 08:14:18,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392645762] [2022-11-19 08:14:18,744 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:14:18,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:14:18,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:14:18,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:14:18,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:14:18,745 INFO L87 Difference]: Start difference. First operand 435 states and 1119 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:22,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:22,156 INFO L93 Difference]: Finished difference Result 1300 states and 3353 transitions. [2022-11-19 08:14:22,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:14:22,158 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 08:14:22,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:22,167 INFO L225 Difference]: With dead ends: 1300 [2022-11-19 08:14:22,168 INFO L226 Difference]: Without dead ends: 1300 [2022-11-19 08:14:22,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:14:22,169 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 258 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:22,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 10 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-19 08:14:22,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-11-19 08:14:22,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 438. [2022-11-19 08:14:22,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 266 states have (on average 4.2293233082706765) internal successors, (1125), 437 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:22,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1125 transitions. [2022-11-19 08:14:22,197 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1125 transitions. Word has length 3 [2022-11-19 08:14:22,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:22,198 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 1125 transitions. [2022-11-19 08:14:22,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:22,198 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1125 transitions. [2022-11-19 08:14:22,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 08:14:22,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:22,199 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 08:14:22,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:22,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:22,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:22,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:22,802 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:14:22,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:22,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1214989030, now seen corresponding path program 1 times [2022-11-19 08:14:22,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:14:22,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1830616931] [2022-11-19 08:14:22,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:22,803 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:22,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:14:22,804 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:14:22,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-19 08:14:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:22,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:14:22,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:22,971 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-11-19 08:14:22,971 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 2 case distinctions, treesize of input 12 treesize of output 22 [2022-11-19 08:14:23,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:14:23,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:14:23,006 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:14:23,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1830616931] [2022-11-19 08:14:23,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1830616931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:23,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:14:23,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:14:23,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733146119] [2022-11-19 08:14:23,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:23,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:23,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:14:23,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:23,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:23,008 INFO L87 Difference]: Start difference. First operand 438 states and 1125 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:23,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:23,614 INFO L93 Difference]: Finished difference Result 416 states and 1081 transitions. [2022-11-19 08:14:23,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:23,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 08:14:23,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:23,618 INFO L225 Difference]: With dead ends: 416 [2022-11-19 08:14:23,618 INFO L226 Difference]: Without dead ends: 416 [2022-11-19 08:14:23,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:23,619 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:23,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 2 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:14:23,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-11-19 08:14:23,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2022-11-19 08:14:23,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 262 states have (on average 4.125954198473282) internal successors, (1081), 415 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:23,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1081 transitions. [2022-11-19 08:14:23,635 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1081 transitions. Word has length 5 [2022-11-19 08:14:23,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:23,635 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 1081 transitions. [2022-11-19 08:14:23,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:23,636 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1081 transitions. [2022-11-19 08:14:23,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 08:14:23,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:23,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 08:14:23,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:23,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:23,849 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:14:23,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:23,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1214989031, now seen corresponding path program 1 times [2022-11-19 08:14:23,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:14:23,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072911086] [2022-11-19 08:14:23,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:23,850 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:23,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:14:23,853 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:14:23,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-19 08:14:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:23,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:14:23,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:24,082 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 08:14:24,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 08:14:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:24,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:24,687 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:14:24,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072911086] [2022-11-19 08:14:24,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1072911086] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:24,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [423079142] [2022-11-19 08:14:24,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:24,688 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:14:24,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:14:24,691 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:14:24,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-19 08:14:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:24,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:14:24,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:24,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:24,939 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-19 08:14:24,939 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 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-19 08:14:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:14:25,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:14:25,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [423079142] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:25,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:14:25,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-19 08:14:25,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930159821] [2022-11-19 08:14:25,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:25,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:25,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:14:25,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:25,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:14:25,050 INFO L87 Difference]: Start difference. First operand 416 states and 1081 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:25,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:25,591 INFO L93 Difference]: Finished difference Result 416 states and 1084 transitions. [2022-11-19 08:14:25,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:25,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 08:14:25,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:25,595 INFO L225 Difference]: With dead ends: 416 [2022-11-19 08:14:25,595 INFO L226 Difference]: Without dead ends: 416 [2022-11-19 08:14:25,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:14:25,597 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:25,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 35 Unchecked, 0.5s Time] [2022-11-19 08:14:25,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-11-19 08:14:25,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2022-11-19 08:14:25,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 262 states have (on average 4.137404580152672) internal successors, (1084), 415 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:25,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1084 transitions. [2022-11-19 08:14:25,614 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1084 transitions. Word has length 5 [2022-11-19 08:14:25,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:25,614 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 1084 transitions. [2022-11-19 08:14:25,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:25,615 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1084 transitions. [2022-11-19 08:14:25,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 08:14:25,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:25,615 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 08:14:25,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:25,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:26,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -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_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:14:26,030 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:14:26,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:26,030 INFO L85 PathProgramCache]: Analyzing trace with hash -990057958, now seen corresponding path program 1 times [2022-11-19 08:14:26,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:14:26,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450573340] [2022-11-19 08:14:26,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:26,031 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:26,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:14:26,032 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:14:26,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-19 08:14:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:26,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:14:26,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:26,209 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-11-19 08:14:26,210 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 2 case distinctions, treesize of input 12 treesize of output 33 [2022-11-19 08:14:26,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:14:26,243 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:14:26,243 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:14:26,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450573340] [2022-11-19 08:14:26,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450573340] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:26,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:14:26,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:14:26,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109968182] [2022-11-19 08:14:26,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:26,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:14:26,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:14:26,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:14:26,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:14:26,246 INFO L87 Difference]: Start difference. First operand 416 states and 1084 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:26,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:26,876 INFO L93 Difference]: Finished difference Result 250 states and 640 transitions. [2022-11-19 08:14:26,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:14:26,877 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 08:14:26,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:26,879 INFO L225 Difference]: With dead ends: 250 [2022-11-19 08:14:26,879 INFO L226 Difference]: Without dead ends: 250 [2022-11-19 08:14:26,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:14:26,881 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:26,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 2 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:14:26,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-19 08:14:26,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2022-11-19 08:14:26,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 177 states have (on average 3.615819209039548) internal successors, (640), 249 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:26,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 640 transitions. [2022-11-19 08:14:26,892 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 640 transitions. Word has length 6 [2022-11-19 08:14:26,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:26,892 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 640 transitions. [2022-11-19 08:14:26,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:26,893 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 640 transitions. [2022-11-19 08:14:26,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 08:14:26,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:26,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 08:14:26,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:14:27,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:27,108 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:14:27,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:27,108 INFO L85 PathProgramCache]: Analyzing trace with hash -990057957, now seen corresponding path program 1 times [2022-11-19 08:14:27,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:14:27,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [262095446] [2022-11-19 08:14:27,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:27,109 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:27,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:14:27,110 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:14:27,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-19 08:14:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:27,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:14:27,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:27,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:27,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-11-19 08:14:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:27,649 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:14:27,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [262095446] [2022-11-19 08:14:27,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [262095446] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:27,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [26609971] [2022-11-19 08:14:27,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:27,650 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:14:27,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:14:27,651 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:14:27,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-19 08:14:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:27,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:14:27,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:27,892 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 08:14:27,893 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 08:14:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:28,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:28,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [26609971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:28,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145859818] [2022-11-19 08:14:28,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:28,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:28,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:28,491 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:14:28,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 08:14:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:28,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:14:28,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:28,658 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 08:14:28,658 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 08:14:28,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:28,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:28,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145859818] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:28,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:14:28,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 12 [2022-11-19 08:14:28,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097473659] [2022-11-19 08:14:28,943 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:14:28,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 08:14:28,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:14:28,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 08:14:28,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:14:28,944 INFO L87 Difference]: Start difference. First operand 250 states and 640 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:31,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:31,044 INFO L93 Difference]: Finished difference Result 254 states and 646 transitions. [2022-11-19 08:14:31,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:14:31,045 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 08:14:31,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:31,047 INFO L225 Difference]: With dead ends: 254 [2022-11-19 08:14:31,047 INFO L226 Difference]: Without dead ends: 254 [2022-11-19 08:14:31,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:14:31,048 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:31,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 17 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 203 Invalid, 0 Unknown, 5 Unchecked, 1.8s Time] [2022-11-19 08:14:31,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-11-19 08:14:31,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 250. [2022-11-19 08:14:31,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 177 states have (on average 3.610169491525424) internal successors, (639), 249 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:31,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 639 transitions. [2022-11-19 08:14:31,056 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 639 transitions. Word has length 6 [2022-11-19 08:14:31,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:31,056 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 639 transitions. [2022-11-19 08:14:31,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:31,057 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 639 transitions. [2022-11-19 08:14:31,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 08:14:31,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:31,057 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-19 08:14:31,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:31,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2022-11-19 08:14:31,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:31,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:31,669 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:14:31,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:31,669 INFO L85 PathProgramCache]: Analyzing trace with hash -991149115, now seen corresponding path program 2 times [2022-11-19 08:14:31,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:14:31,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1507137543] [2022-11-19 08:14:31,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:14:31,670 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:31,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:14:31,671 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:14:31,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-19 08:14:31,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:14:31,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:14:31,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:14:31,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:31,889 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 08:14:31,889 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 08:14:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:32,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:33,150 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:14:33,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1507137543] [2022-11-19 08:14:33,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1507137543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:33,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [411181068] [2022-11-19 08:14:33,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:14:33,151 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:14:33,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:14:33,152 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:14:33,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-19 08:14:33,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:14:33,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:14:33,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:14:33,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:33,501 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 08:14:33,502 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 08:14:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:33,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:34,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:34,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [411181068] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:34,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490808550] [2022-11-19 08:14:34,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:14:34,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:34,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:34,021 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:14:34,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 08:14:34,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:14:34,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:14:34,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:14:34,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:34,260 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 08:14:34,260 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 08:14:34,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:34,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:34,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490808550] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:34,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:14:34,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2022-11-19 08:14:34,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388730293] [2022-11-19 08:14:34,597 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:14:34,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 08:14:34,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:14:34,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 08:14:34,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:14:34,599 INFO L87 Difference]: Start difference. First operand 250 states and 639 transitions. Second operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:43,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:43,840 INFO L93 Difference]: Finished difference Result 2200 states and 5675 transitions. [2022-11-19 08:14:43,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 08:14:43,841 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 08:14:43,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:43,854 INFO L225 Difference]: With dead ends: 2200 [2022-11-19 08:14:43,854 INFO L226 Difference]: Without dead ends: 2200 [2022-11-19 08:14:43,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:14:43,855 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 928 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:43,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [928 Valid, 68 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-11-19 08:14:43,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2022-11-19 08:14:43,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 256. [2022-11-19 08:14:43,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 183 states have (on average 3.557377049180328) internal successors, (651), 255 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:43,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 651 transitions. [2022-11-19 08:14:43,880 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 651 transitions. Word has length 6 [2022-11-19 08:14:43,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:43,880 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 651 transitions. [2022-11-19 08:14:43,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:43,881 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 651 transitions. [2022-11-19 08:14:43,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:14:43,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:43,881 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:43,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:44,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:44,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:44,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:14:44,493 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:14:44,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:44,494 INFO L85 PathProgramCache]: Analyzing trace with hash -626619241, now seen corresponding path program 1 times [2022-11-19 08:14:44,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:14:44,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639090950] [2022-11-19 08:14:44,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:44,494 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:44,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:14:44,495 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:14:44,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-19 08:14:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:44,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:14:44,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:44,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:14:44,640 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:14:44,640 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:14:44,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639090950] [2022-11-19 08:14:44,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639090950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:44,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:14:44,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:14:44,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577953055] [2022-11-19 08:14:44,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:44,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:14:44,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:14:44,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:14:44,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:14:44,642 INFO L87 Difference]: Start difference. First operand 256 states and 651 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:45,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:45,134 INFO L93 Difference]: Finished difference Result 208 states and 507 transitions. [2022-11-19 08:14:45,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:45,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:14:45,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:45,136 INFO L225 Difference]: With dead ends: 208 [2022-11-19 08:14:45,137 INFO L226 Difference]: Without dead ends: 208 [2022-11-19 08:14:45,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:14:45,137 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:45,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 2 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:14:45,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-19 08:14:45,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-11-19 08:14:45,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 155 states have (on average 3.270967741935484) internal successors, (507), 207 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:45,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 507 transitions. [2022-11-19 08:14:45,144 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 507 transitions. Word has length 7 [2022-11-19 08:14:45,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:45,145 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 507 transitions. [2022-11-19 08:14:45,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:45,145 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 507 transitions. [2022-11-19 08:14:45,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:14:45,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:45,146 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:45,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:45,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:45,359 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:14:45,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:45,359 INFO L85 PathProgramCache]: Analyzing trace with hash -626619240, now seen corresponding path program 1 times [2022-11-19 08:14:45,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:14:45,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1989943857] [2022-11-19 08:14:45,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:45,360 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:45,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:14:45,361 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:14:45,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-19 08:14:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:45,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:14:45,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:45,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:14:45,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:14:45,471 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:14:45,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1989943857] [2022-11-19 08:14:45,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1989943857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:45,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:14:45,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:14:45,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292445479] [2022-11-19 08:14:45,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:45,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:45,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:14:45,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:45,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:45,473 INFO L87 Difference]: Start difference. First operand 208 states and 507 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:45,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:45,888 INFO L93 Difference]: Finished difference Result 160 states and 363 transitions. [2022-11-19 08:14:45,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:45,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:14:45,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:45,890 INFO L225 Difference]: With dead ends: 160 [2022-11-19 08:14:45,890 INFO L226 Difference]: Without dead ends: 160 [2022-11-19 08:14:45,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:14:45,891 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:45,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 2 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:14:45,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-19 08:14:45,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-11-19 08:14:45,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 127 states have (on average 2.858267716535433) internal successors, (363), 159 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:45,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 363 transitions. [2022-11-19 08:14:45,896 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 363 transitions. Word has length 7 [2022-11-19 08:14:45,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:45,897 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 363 transitions. [2022-11-19 08:14:45,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:45,897 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 363 transitions. [2022-11-19 08:14:45,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:14:45,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:45,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:45,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:46,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:46,110 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:14:46,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:46,110 INFO L85 PathProgramCache]: Analyzing trace with hash -626624774, now seen corresponding path program 1 times [2022-11-19 08:14:46,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:14:46,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1364686609] [2022-11-19 08:14:46,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:46,111 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:46,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:14:46,112 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:14:46,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:14:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:46,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:14:46,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:46,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:46,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2022-11-19 08:14:46,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:46,601 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:14:46,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1364686609] [2022-11-19 08:14:46,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1364686609] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:46,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [835226553] [2022-11-19 08:14:46,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:46,601 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:14:46,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:14:46,602 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:14:46,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-19 08:14:46,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:46,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:14:46,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:46,858 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 08:14:46,858 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 08:14:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:47,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:47,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:47,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [835226553] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:47,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838164321] [2022-11-19 08:14:47,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:47,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:47,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:47,485 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:14:47,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-19 08:14:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:47,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:14:47,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:47,671 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 08:14:47,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 08:14:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:47,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:48,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:48,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838164321] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:48,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:14:48,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 12 [2022-11-19 08:14:48,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032723545] [2022-11-19 08:14:48,034 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:14:48,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 08:14:48,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:14:48,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 08:14:48,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:14:48,036 INFO L87 Difference]: Start difference. First operand 160 states and 363 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:49,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:49,922 INFO L93 Difference]: Finished difference Result 167 states and 378 transitions. [2022-11-19 08:14:49,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:14:49,923 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:14:49,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:49,924 INFO L225 Difference]: With dead ends: 167 [2022-11-19 08:14:49,925 INFO L226 Difference]: Without dead ends: 167 [2022-11-19 08:14:49,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:14:49,926 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:49,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 13 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 136 Invalid, 0 Unknown, 7 Unchecked, 1.5s Time] [2022-11-19 08:14:49,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-19 08:14:49,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 161. [2022-11-19 08:14:49,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 128 states have (on average 2.859375) internal successors, (366), 160 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:49,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 366 transitions. [2022-11-19 08:14:49,932 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 366 transitions. Word has length 7 [2022-11-19 08:14:49,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:49,932 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 366 transitions. [2022-11-19 08:14:49,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:49,933 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 366 transitions. [2022-11-19 08:14:49,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:14:49,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:49,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:49,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:50,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:50,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:14:50,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:50,537 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:14:50,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:50,537 INFO L85 PathProgramCache]: Analyzing trace with hash -627023961, now seen corresponding path program 1 times [2022-11-19 08:14:50,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:14:50,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1509854982] [2022-11-19 08:14:50,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:50,538 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:50,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:14:50,539 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:14:50,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-19 08:14:50,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:50,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:14:50,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:50,775 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 08:14:50,776 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 08:14:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:14:50,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:14:51,958 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:14:51,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1509854982] [2022-11-19 08:14:51,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1509854982] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:51,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2143058097] [2022-11-19 08:14:51,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:51,958 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:14:51,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:14:51,959 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:14:51,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-19 08:14:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:52,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:14:52,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:52,266 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 08:14:52,267 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 08:14:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:14:52,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:14:52,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2143058097] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:52,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592700483] [2022-11-19 08:14:52,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:52,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:52,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:52,863 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:14:52,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-19 08:14:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:53,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:14:53,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:53,102 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 08:14:53,102 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 08:14:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:14:53,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:14:53,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592700483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:53,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:14:53,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 9 [2022-11-19 08:14:53,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700552527] [2022-11-19 08:14:53,666 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:14:53,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 08:14:53,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:14:53,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 08:14:53,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:14:53,667 INFO L87 Difference]: Start difference. First operand 161 states and 366 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:54,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:54,872 INFO L93 Difference]: Finished difference Result 241 states and 623 transitions. [2022-11-19 08:14:54,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:14:54,873 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:14:54,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:54,875 INFO L225 Difference]: With dead ends: 241 [2022-11-19 08:14:54,875 INFO L226 Difference]: Without dead ends: 241 [2022-11-19 08:14:54,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:14:54,876 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 73 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:54,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 16 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 135 Invalid, 0 Unknown, 137 Unchecked, 1.1s Time] [2022-11-19 08:14:54,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-19 08:14:54,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 206. [2022-11-19 08:14:54,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 173 states have (on average 3.0289017341040463) internal successors, (524), 205 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:54,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 524 transitions. [2022-11-19 08:14:54,893 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 524 transitions. Word has length 7 [2022-11-19 08:14:54,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:54,893 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 524 transitions. [2022-11-19 08:14:54,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:54,894 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 524 transitions. [2022-11-19 08:14:54,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:14:54,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:54,895 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:54,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:55,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2022-11-19 08:14:55,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-11-19 08:14:55,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:55,502 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:14:55,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:55,503 INFO L85 PathProgramCache]: Analyzing trace with hash -627023997, now seen corresponding path program 1 times [2022-11-19 08:14:55,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:14:55,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146858240] [2022-11-19 08:14:55,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:55,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:55,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:14:55,505 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:14:55,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-19 08:14:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:55,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:14:55,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:55,807 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 08:14:55,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 08:14:56,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:56,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:56,474 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:14:56,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146858240] [2022-11-19 08:14:56,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146858240] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:56,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [510308420] [2022-11-19 08:14:56,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:56,475 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:14:56,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:14:56,479 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:14:56,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-19 08:14:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:56,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:14:56,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:56,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:56,826 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-19 08:14:56,826 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 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-19 08:14:56,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:14:56,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:14:56,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [510308420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:56,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:14:56,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-19 08:14:56,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766640245] [2022-11-19 08:14:56,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:56,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:56,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:14:56,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:56,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:14:56,953 INFO L87 Difference]: Start difference. First operand 206 states and 524 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:57,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:57,313 INFO L93 Difference]: Finished difference Result 204 states and 516 transitions. [2022-11-19 08:14:57,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:57,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:14:57,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:57,315 INFO L225 Difference]: With dead ends: 204 [2022-11-19 08:14:57,315 INFO L226 Difference]: Without dead ends: 204 [2022-11-19 08:14:57,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:14:57,316 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:57,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 27 Unchecked, 0.4s Time] [2022-11-19 08:14:57,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-19 08:14:57,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2022-11-19 08:14:57,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 169 states have (on average 3.0177514792899407) internal successors, (510), 201 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:57,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 510 transitions. [2022-11-19 08:14:57,324 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 510 transitions. Word has length 7 [2022-11-19 08:14:57,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:57,325 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 510 transitions. [2022-11-19 08:14:57,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:57,325 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 510 transitions. [2022-11-19 08:14:57,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:14:57,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:57,326 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:57,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:57,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:14:57,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:57,729 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:14:57,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:57,730 INFO L85 PathProgramCache]: Analyzing trace with hash -627026880, now seen corresponding path program 1 times [2022-11-19 08:14:57,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:14:57,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913023122] [2022-11-19 08:14:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:57,731 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:57,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:14:57,732 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:14:57,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:14:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:57,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:14:57,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:57,967 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 08:14:57,967 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 08:14:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:58,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:58,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:14:58,598 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:14:58,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913023122] [2022-11-19 08:14:58,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [913023122] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:14:58,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1577806867] [2022-11-19 08:14:58,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:58,598 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:14:58,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:14:58,599 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:14:58,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-19 08:14:58,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:58,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:14:58,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:58,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:58,887 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-19 08:14:58,887 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 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-19 08:14:59,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:14:59,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:14:59,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1577806867] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:59,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:14:59,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-19 08:14:59,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110950101] [2022-11-19 08:14:59,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:59,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:14:59,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:14:59,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:14:59,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:14:59,021 INFO L87 Difference]: Start difference. First operand 202 states and 510 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:59,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:59,496 INFO L93 Difference]: Finished difference Result 206 states and 518 transitions. [2022-11-19 08:14:59,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:14:59,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:14:59,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:59,499 INFO L225 Difference]: With dead ends: 206 [2022-11-19 08:14:59,499 INFO L226 Difference]: Without dead ends: 206 [2022-11-19 08:14:59,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:14:59,500 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:59,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 27 Unchecked, 0.5s Time] [2022-11-19 08:14:59,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-19 08:14:59,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2022-11-19 08:14:59,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 173 states have (on average 2.994219653179191) internal successors, (518), 205 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:59,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 518 transitions. [2022-11-19 08:14:59,508 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 518 transitions. Word has length 7 [2022-11-19 08:14:59,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:59,508 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 518 transitions. [2022-11-19 08:14:59,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:14:59,509 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 518 transitions. [2022-11-19 08:14:59,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 08:14:59,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:59,510 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:59,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:14:59,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:59,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:14:59,923 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:14:59,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:59,924 INFO L85 PathProgramCache]: Analyzing trace with hash 2037092404, now seen corresponding path program 1 times [2022-11-19 08:14:59,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:14:59,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169310540] [2022-11-19 08:14:59,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:59,924 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:59,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:14:59,925 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:14:59,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-19 08:15:00,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:00,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:15:00,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:00,174 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 08:15:00,174 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 08:15:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:15:00,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:15:00,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:15:00,848 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:15:00,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169310540] [2022-11-19 08:15:00,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169310540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:15:00,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1529741787] [2022-11-19 08:15:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:00,849 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:15:00,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:15:00,850 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:15:00,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-19 08:15:01,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:01,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:15:01,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:01,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:15:01,184 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-11-19 08:15:01,184 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 1 case distinctions, treesize of input 12 treesize of output 23 [2022-11-19 08:15:01,335 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:15:01,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:15:01,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1529741787] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:15:01,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:15:01,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-19 08:15:01,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487200853] [2022-11-19 08:15:01,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:15:01,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:15:01,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:15:01,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:15:01,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:15:01,339 INFO L87 Difference]: Start difference. First operand 206 states and 518 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:01,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:01,765 INFO L93 Difference]: Finished difference Result 205 states and 516 transitions. [2022-11-19 08:15:01,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:15:01,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 08:15:01,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:01,768 INFO L225 Difference]: With dead ends: 205 [2022-11-19 08:15:01,768 INFO L226 Difference]: Without dead ends: 205 [2022-11-19 08:15:01,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:15:01,769 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:01,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 27 Unchecked, 0.4s Time] [2022-11-19 08:15:01,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-19 08:15:01,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 201. [2022-11-19 08:15:01,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 169 states have (on average 3.0059171597633134) internal successors, (508), 200 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:01,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 508 transitions. [2022-11-19 08:15:01,782 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 508 transitions. Word has length 8 [2022-11-19 08:15:01,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:01,782 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 508 transitions. [2022-11-19 08:15:01,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:01,783 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 508 transitions. [2022-11-19 08:15:01,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 08:15:01,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:01,789 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:01,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:02,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-11-19 08:15:02,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:15:02,204 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:15:02,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:02,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1643877715, now seen corresponding path program 1 times [2022-11-19 08:15:02,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:15:02,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844546915] [2022-11-19 08:15:02,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:02,205 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:15:02,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:15:02,206 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:15:02,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-19 08:15:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:02,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:15:02,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:02,480 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 08:15:02,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 08:15:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:15:02,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:15:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:15:04,249 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:15:04,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844546915] [2022-11-19 08:15:04,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844546915] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:15:04,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1053733290] [2022-11-19 08:15:04,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:04,250 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:15:04,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:15:04,252 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:15:04,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-19 08:15:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:04,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:15:04,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:04,621 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 08:15:04,622 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 08:15:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:15:04,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:15:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:15:06,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1053733290] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:15:06,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229637900] [2022-11-19 08:15:06,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:06,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:06,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:06,245 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:06,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-19 08:15:06,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:06,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:15:06,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:06,544 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 08:15:06,544 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 08:15:06,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:15:06,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:15:07,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:15:07,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229637900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:15:07,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:15:07,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 16 [2022-11-19 08:15:07,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376940173] [2022-11-19 08:15:07,871 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:15:07,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 08:15:07,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:15:07,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 08:15:07,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-11-19 08:15:07,872 INFO L87 Difference]: Start difference. First operand 201 states and 508 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:14,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:14,883 INFO L93 Difference]: Finished difference Result 223 states and 597 transitions. [2022-11-19 08:15:14,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 08:15:14,883 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 08:15:14,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:14,885 INFO L225 Difference]: With dead ends: 223 [2022-11-19 08:15:14,885 INFO L226 Difference]: Without dead ends: 223 [2022-11-19 08:15:14,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2022-11-19 08:15:14,886 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 24 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:14,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 46 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 60 Invalid, 0 Unknown, 166 Unchecked, 0.6s Time] [2022-11-19 08:15:14,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-11-19 08:15:14,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 215. [2022-11-19 08:15:14,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 183 states have (on average 3.1256830601092895) internal successors, (572), 214 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:14,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 572 transitions. [2022-11-19 08:15:14,893 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 572 transitions. Word has length 9 [2022-11-19 08:15:14,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:14,893 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 572 transitions. [2022-11-19 08:15:14,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:14,894 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 572 transitions. [2022-11-19 08:15:14,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 08:15:14,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:14,895 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:14,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-11-19 08:15:15,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2022-11-19 08:15:15,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-19 08:15:15,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -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_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:15,503 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:15:15,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:15,503 INFO L85 PathProgramCache]: Analyzing trace with hash 616701191, now seen corresponding path program 2 times [2022-11-19 08:15:15,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:15:15,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350387968] [2022-11-19 08:15:15,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:15:15,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:15:15,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:15:15,505 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:15:15,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-19 08:15:15,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 08:15:15,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:15:15,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:15:15,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:15,701 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 08:15:15,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 08:15:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:15:15,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:15:15,856 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:15:15,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350387968] [2022-11-19 08:15:15,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350387968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:15:15,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:15:15,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:15:15,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255180725] [2022-11-19 08:15:15,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:15:15,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:15:15,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:15:15,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:15:15,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:15:15,858 INFO L87 Difference]: Start difference. First operand 215 states and 572 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:16,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:16,390 INFO L93 Difference]: Finished difference Result 107 states and 264 transitions. [2022-11-19 08:15:16,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:15:16,391 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 08:15:16,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:16,392 INFO L225 Difference]: With dead ends: 107 [2022-11-19 08:15:16,392 INFO L226 Difference]: Without dead ends: 107 [2022-11-19 08:15:16,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:15:16,393 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:16,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 2 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:15:16,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-19 08:15:16,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 49. [2022-11-19 08:15:16,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 46 states have (on average 2.1956521739130435) internal successors, (101), 48 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 101 transitions. [2022-11-19 08:15:16,396 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 101 transitions. Word has length 9 [2022-11-19 08:15:16,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:16,397 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 101 transitions. [2022-11-19 08:15:16,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:16,397 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 101 transitions. [2022-11-19 08:15:16,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:15:16,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:16,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:16,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-11-19 08:15:16,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:15:16,609 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:15:16,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:16,609 INFO L85 PathProgramCache]: Analyzing trace with hash -700761557, now seen corresponding path program 1 times [2022-11-19 08:15:16,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:15:16,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181125421] [2022-11-19 08:15:16,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:16,610 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:15:16,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:15:16,611 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:15:16,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-19 08:15:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:16,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:15:16,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:15:16,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:15:16,792 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:15:16,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181125421] [2022-11-19 08:15:16,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181125421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:15:16,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:15:16,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:15:16,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407202177] [2022-11-19 08:15:16,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:15:16,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:15:16,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:15:16,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:15:16,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:15:16,794 INFO L87 Difference]: Start difference. First operand 49 states and 101 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:16,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:16,960 INFO L93 Difference]: Finished difference Result 46 states and 95 transitions. [2022-11-19 08:15:16,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:15:16,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 08:15:16,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:16,961 INFO L225 Difference]: With dead ends: 46 [2022-11-19 08:15:16,961 INFO L226 Difference]: Without dead ends: 46 [2022-11-19 08:15:16,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:15:16,962 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:16,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 2 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:15:16,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-19 08:15:16,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-19 08:15:16,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 2.159090909090909) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:16,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 95 transitions. [2022-11-19 08:15:16,964 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 95 transitions. Word has length 11 [2022-11-19 08:15:16,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:16,965 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 95 transitions. [2022-11-19 08:15:16,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:16,965 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 95 transitions. [2022-11-19 08:15:16,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:15:16,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:16,966 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-19 08:15:16,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:17,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:15:17,178 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:15:17,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:17,178 INFO L85 PathProgramCache]: Analyzing trace with hash 22548389, now seen corresponding path program 3 times [2022-11-19 08:15:17,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:15:17,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [773989178] [2022-11-19 08:15:17,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:15:17,178 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:15:17,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:15:17,179 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:15:17,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-19 08:15:17,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 08:15:17,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:15:17,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:15:17,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:17,479 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 08:15:17,479 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 08:15:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:15:18,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:15:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:15:21,561 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:15:21,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [773989178] [2022-11-19 08:15:21,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [773989178] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:15:21,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1366968590] [2022-11-19 08:15:21,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:15:21,562 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:15:21,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:15:21,563 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:15:21,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-19 08:15:22,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 08:15:22,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:15:22,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 08:15:22,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:22,416 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 08:15:22,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 08:15:23,193 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:15:23,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:15:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:15:27,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1366968590] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:15:27,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648486849] [2022-11-19 08:15:27,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:15:27,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:27,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:27,976 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:27,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-19 08:15:29,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 08:15:29,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:15:29,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:15:29,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:29,917 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-19 08:15:29,918 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 2 case distinctions, treesize of input 14 treesize of output 29 [2022-11-19 08:15:30,113 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:15:30,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:15:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:15:30,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648486849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:15:30,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:15:30,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 42 [2022-11-19 08:15:30,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392513065] [2022-11-19 08:15:30,536 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:15:30,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-19 08:15:30,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:15:30,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-19 08:15:30,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 08:15:30,538 INFO L87 Difference]: Start difference. First operand 46 states and 95 transitions. Second operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:52,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:52,410 INFO L93 Difference]: Finished difference Result 718 states and 1559 transitions. [2022-11-19 08:15:52,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 08:15:52,412 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 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 [2022-11-19 08:15:52,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:52,415 INFO L225 Difference]: With dead ends: 718 [2022-11-19 08:15:52,415 INFO L226 Difference]: Without dead ends: 718 [2022-11-19 08:15:52,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=941, Invalid=1921, Unknown=0, NotChecked=0, Total=2862 [2022-11-19 08:15:52,416 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 2910 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 2029 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2910 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 2069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:52,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2910 Valid, 284 Invalid, 2069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2029 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2022-11-19 08:15:52,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-11-19 08:15:52,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 58. [2022-11-19 08:15:52,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 56 states have (on average 2.125) internal successors, (119), 57 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:52,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 119 transitions. [2022-11-19 08:15:52,421 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 119 transitions. Word has length 12 [2022-11-19 08:15:52,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:52,421 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 119 transitions. [2022-11-19 08:15:52,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:52,422 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 119 transitions. [2022-11-19 08:15:52,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 08:15:52,422 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:52,422 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:52,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:52,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:15:52,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2022-11-19 08:15:53,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:15:53,023 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:15:53,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:53,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1681479297, now seen corresponding path program 1 times [2022-11-19 08:15:53,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:15:53,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233317466] [2022-11-19 08:15:53,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:53,025 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:15:53,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:15:53,026 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:15:53,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-19 08:15:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:53,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:15:53,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:53,414 INFO L321 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2022-11-19 08:15:53,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 293 treesize of output 223 [2022-11-19 08:15:53,425 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 223 treesize of output 219 [2022-11-19 08:15:53,436 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 219 treesize of output 215 [2022-11-19 08:15:53,760 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:15:53,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 281 treesize of output 259 [2022-11-19 08:15:53,788 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 221 treesize of output 215 [2022-11-19 08:15:54,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:15:54,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:15:54,203 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:15:54,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233317466] [2022-11-19 08:15:54,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233317466] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:15:54,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:15:54,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:15:54,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548952857] [2022-11-19 08:15:54,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:15:54,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:15:54,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:15:54,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:15:54,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:15:54,205 INFO L87 Difference]: Start difference. First operand 58 states and 119 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:54,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:54,614 INFO L93 Difference]: Finished difference Result 78 states and 162 transitions. [2022-11-19 08:15:54,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:15:54,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-19 08:15:54,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:54,616 INFO L225 Difference]: With dead ends: 78 [2022-11-19 08:15:54,616 INFO L226 Difference]: Without dead ends: 78 [2022-11-19 08:15:54,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:15:54,617 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:54,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 10 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:15:54,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-19 08:15:54,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 64. [2022-11-19 08:15:54,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 2.129032258064516) internal successors, (132), 63 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:54,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 132 transitions. [2022-11-19 08:15:54,619 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 132 transitions. Word has length 15 [2022-11-19 08:15:54,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:54,619 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 132 transitions. [2022-11-19 08:15:54,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:54,620 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 132 transitions. [2022-11-19 08:15:54,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 08:15:54,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:54,620 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:54,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:15:54,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:15:54,821 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:15:54,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:54,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1638896423, now seen corresponding path program 2 times [2022-11-19 08:15:54,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:15:54,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [893736340] [2022-11-19 08:15:54,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:15:54,821 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:15:54,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:15:54,823 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:15:54,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-19 08:15:54,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 08:15:54,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:15:54,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:15:54,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:55,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:15:55,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:15:55,225 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:15:55,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [893736340] [2022-11-19 08:15:55,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [893736340] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:15:55,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:15:55,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:15:55,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060437597] [2022-11-19 08:15:55,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:15:55,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:15:55,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:15:55,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:15:55,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:15:55,226 INFO L87 Difference]: Start difference. First operand 64 states and 132 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:55,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:55,622 INFO L93 Difference]: Finished difference Result 76 states and 168 transitions. [2022-11-19 08:15:55,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:15:55,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-19 08:15:55,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:55,623 INFO L225 Difference]: With dead ends: 76 [2022-11-19 08:15:55,623 INFO L226 Difference]: Without dead ends: 76 [2022-11-19 08:15:55,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:15:55,624 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:55,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 5 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:15:55,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-11-19 08:15:55,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2022-11-19 08:15:55,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 68 states have (on average 2.176470588235294) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:55,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 148 transitions. [2022-11-19 08:15:55,627 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 148 transitions. Word has length 15 [2022-11-19 08:15:55,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:55,627 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 148 transitions. [2022-11-19 08:15:55,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:55,627 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 148 transitions. [2022-11-19 08:15:55,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 08:15:55,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:55,628 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:55,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:55,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:15:55,841 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:15:55,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:55,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1818835237, now seen corresponding path program 3 times [2022-11-19 08:15:55,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:15:55,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102286599] [2022-11-19 08:15:55,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:15:55,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:15:55,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:15:55,843 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:15:55,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-19 08:15:56,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 08:15:56,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:15:56,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:15:56,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:56,481 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:15:56,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 281 treesize of output 259 [2022-11-19 08:15:56,505 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 221 treesize of output 215 [2022-11-19 08:15:56,830 INFO L321 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2022-11-19 08:15:56,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 293 treesize of output 223 [2022-11-19 08:15:56,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 219 [2022-11-19 08:15:56,853 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 219 treesize of output 215 [2022-11-19 08:15:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:15:56,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:15:56,909 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:15:56,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102286599] [2022-11-19 08:15:56,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102286599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:15:56,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:15:56,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:15:56,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613284277] [2022-11-19 08:15:56,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:15:56,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:15:56,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:15:56,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:15:56,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:15:56,911 INFO L87 Difference]: Start difference. First operand 70 states and 148 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:57,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:57,381 INFO L93 Difference]: Finished difference Result 78 states and 171 transitions. [2022-11-19 08:15:57,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:15:57,381 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-19 08:15:57,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:57,382 INFO L225 Difference]: With dead ends: 78 [2022-11-19 08:15:57,382 INFO L226 Difference]: Without dead ends: 78 [2022-11-19 08:15:57,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:15:57,383 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:57,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 5 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:15:57,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-19 08:15:57,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2022-11-19 08:15:57,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 68 states have (on average 2.176470588235294) internal successors, (148), 69 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:57,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 148 transitions. [2022-11-19 08:15:57,388 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 148 transitions. Word has length 15 [2022-11-19 08:15:57,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:57,388 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 148 transitions. [2022-11-19 08:15:57,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:57,389 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 148 transitions. [2022-11-19 08:15:57,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 08:15:57,389 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:57,389 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:57,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:57,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:15:57,602 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:15:57,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:57,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1813142883, now seen corresponding path program 4 times [2022-11-19 08:15:57,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:15:57,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1792108002] [2022-11-19 08:15:57,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:15:57,603 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:15:57,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:15:57,604 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:15:57,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-19 08:15:57,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:15:57,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:15:57,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:15:57,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:15:58,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:15:58,004 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:15:58,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1792108002] [2022-11-19 08:15:58,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1792108002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:15:58,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:15:58,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:15:58,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367562625] [2022-11-19 08:15:58,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:15:58,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:15:58,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:15:58,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:15:58,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:15:58,006 INFO L87 Difference]: Start difference. First operand 70 states and 148 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:58,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:58,641 INFO L93 Difference]: Finished difference Result 104 states and 227 transitions. [2022-11-19 08:15:58,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:15:58,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-19 08:15:58,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:58,643 INFO L225 Difference]: With dead ends: 104 [2022-11-19 08:15:58,643 INFO L226 Difference]: Without dead ends: 104 [2022-11-19 08:15:58,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:15:58,644 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 19 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:58,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 5 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:15:58,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-19 08:15:58,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 76. [2022-11-19 08:15:58,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 75 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:58,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 170 transitions. [2022-11-19 08:15:58,647 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 170 transitions. Word has length 15 [2022-11-19 08:15:58,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:58,647 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 170 transitions. [2022-11-19 08:15:58,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:15:58,648 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 170 transitions. [2022-11-19 08:15:58,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 08:15:58,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:58,648 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:58,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:58,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:15:58,861 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:15:58,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:58,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1633204069, now seen corresponding path program 5 times [2022-11-19 08:15:58,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:15:58,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1552690258] [2022-11-19 08:15:58,861 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-19 08:15:58,862 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:15:58,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:15:58,862 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:15:58,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-19 08:15:59,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:15:59,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:15:59,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:15:59,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:59,573 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:15:59,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 281 treesize of output 259 [2022-11-19 08:15:59,601 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 221 treesize of output 215 [2022-11-19 08:15:59,953 INFO L321 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2022-11-19 08:15:59,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 293 treesize of output 223 [2022-11-19 08:15:59,965 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 223 treesize of output 219 [2022-11-19 08:15:59,975 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 219 treesize of output 215 [2022-11-19 08:16:00,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:16:00,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:16:00,029 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:16:00,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1552690258] [2022-11-19 08:16:00,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1552690258] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:16:00,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:16:00,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:16:00,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053554133] [2022-11-19 08:16:00,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:16:00,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:16:00,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:16:00,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:16:00,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:16:00,031 INFO L87 Difference]: Start difference. First operand 76 states and 170 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:16:00,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:16:00,679 INFO L93 Difference]: Finished difference Result 112 states and 235 transitions. [2022-11-19 08:16:00,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:16:00,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-19 08:16:00,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:16:00,681 INFO L225 Difference]: With dead ends: 112 [2022-11-19 08:16:00,681 INFO L226 Difference]: Without dead ends: 112 [2022-11-19 08:16:00,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:16:00,681 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:16:00,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 5 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:16:00,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-19 08:16:00,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 74. [2022-11-19 08:16:00,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 72 states have (on average 2.236111111111111) internal successors, (161), 73 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:16:00,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 161 transitions. [2022-11-19 08:16:00,685 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 161 transitions. Word has length 15 [2022-11-19 08:16:00,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:16:00,685 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 161 transitions. [2022-11-19 08:16:00,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:16:00,685 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 161 transitions. [2022-11-19 08:16:00,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 08:16:00,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:16:00,686 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:16:00,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-19 08:16:00,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:16:00,891 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:16:00,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:16:00,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1578946079, now seen corresponding path program 6 times [2022-11-19 08:16:00,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:16:00,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1256397093] [2022-11-19 08:16:00,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-19 08:16:00,892 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:16:00,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:16:00,894 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:16:00,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-19 08:16:01,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-11-19 08:16:01,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:16:01,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:16:01,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:16:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:16:01,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:16:01,289 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:16:01,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1256397093] [2022-11-19 08:16:01,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1256397093] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:16:01,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:16:01,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:16:01,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494024625] [2022-11-19 08:16:01,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:16:01,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:16:01,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:16:01,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:16:01,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:16:01,290 INFO L87 Difference]: Start difference. First operand 74 states and 161 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:16:01,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:16:01,888 INFO L93 Difference]: Finished difference Result 98 states and 207 transitions. [2022-11-19 08:16:01,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:16:01,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-19 08:16:01,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:16:01,890 INFO L225 Difference]: With dead ends: 98 [2022-11-19 08:16:01,890 INFO L226 Difference]: Without dead ends: 98 [2022-11-19 08:16:01,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:16:01,891 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 23 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:16:01,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 9 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:16:01,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-19 08:16:01,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2022-11-19 08:16:01,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 2.1794871794871793) internal successors, (170), 79 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:16:01,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 170 transitions. [2022-11-19 08:16:01,894 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 170 transitions. Word has length 15 [2022-11-19 08:16:01,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:16:01,894 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 170 transitions. [2022-11-19 08:16:01,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:16:01,895 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 170 transitions. [2022-11-19 08:16:01,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 08:16:01,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:16:01,895 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:16:01,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-19 08:16:02,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:16:02,108 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:16:02,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:16:02,108 INFO L85 PathProgramCache]: Analyzing trace with hash -2029652117, now seen corresponding path program 1 times [2022-11-19 08:16:02,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:16:02,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359554144] [2022-11-19 08:16:02,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:16:02,109 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:16:02,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:16:02,111 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:16:02,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-19 08:16:02,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:16:02,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:16:02,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:16:02,528 INFO L321 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2022-11-19 08:16:02,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 293 treesize of output 223 [2022-11-19 08:16:02,540 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 223 treesize of output 219 [2022-11-19 08:16:02,552 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 219 treesize of output 215 [2022-11-19 08:16:02,896 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:16:02,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 281 treesize of output 259 [2022-11-19 08:16:02,924 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 221 treesize of output 215 [2022-11-19 08:16:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:16:03,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:16:05,104 INFO L321 Elim1Store]: treesize reduction 504, result has 22.3 percent of original size [2022-11-19 08:16:05,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 678 treesize of output 683 [2022-11-19 08:16:05,133 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 538 treesize of output 528 [2022-11-19 08:16:05,158 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 528 treesize of output 522 [2022-11-19 08:16:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:16:16,318 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:16:16,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359554144] [2022-11-19 08:16:16,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1359554144] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:16:16,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1618851835] [2022-11-19 08:16:16,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:16:16,319 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:16:16,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:16:16,322 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:16:16,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-19 08:16:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:16:16,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:16:16,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:16:16,984 INFO L321 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2022-11-19 08:16:16,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 293 treesize of output 223 [2022-11-19 08:16:17,001 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 223 treesize of output 219 [2022-11-19 08:16:17,012 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 219 treesize of output 215 [2022-11-19 08:16:17,305 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:16:17,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 281 treesize of output 259 [2022-11-19 08:16:17,329 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 221 treesize of output 215 [2022-11-19 08:16:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:16:17,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:16:19,376 INFO L321 Elim1Store]: treesize reduction 504, result has 22.3 percent of original size [2022-11-19 08:16:19,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 678 treesize of output 683 [2022-11-19 08:16:19,404 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 538 treesize of output 532 [2022-11-19 08:16:19,425 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 532 treesize of output 522 [2022-11-19 08:16:20,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:16:20,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1618851835] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:16:20,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240084828] [2022-11-19 08:16:20,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:16:20,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:16:20,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:16:20,771 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:16:20,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-19 08:16:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:16:20,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:16:20,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:16:21,345 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:16:21,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 281 treesize of output 259 [2022-11-19 08:16:21,369 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 221 treesize of output 215 [2022-11-19 08:16:21,703 INFO L321 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2022-11-19 08:16:21,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 293 treesize of output 223 [2022-11-19 08:16:21,712 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 223 treesize of output 219 [2022-11-19 08:16:21,728 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 219 treesize of output 215 [2022-11-19 08:16:21,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:16:21,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:16:23,557 INFO L321 Elim1Store]: treesize reduction 504, result has 22.3 percent of original size [2022-11-19 08:16:23,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 678 treesize of output 683 [2022-11-19 08:16:23,603 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 538 treesize of output 528 [2022-11-19 08:16:23,628 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 528 treesize of output 522 [2022-11-19 08:16:34,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:16:34,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240084828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:16:34,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:16:34,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 13 [2022-11-19 08:16:34,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712698375] [2022-11-19 08:16:34,328 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:16:34,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 08:16:34,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:16:34,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 08:16:34,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:16:34,330 INFO L87 Difference]: Start difference. First operand 80 states and 170 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:16:35,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:16:35,438 INFO L93 Difference]: Finished difference Result 104 states and 215 transitions. [2022-11-19 08:16:35,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 08:16:35,439 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-19 08:16:35,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:16:35,439 INFO L225 Difference]: With dead ends: 104 [2022-11-19 08:16:35,439 INFO L226 Difference]: Without dead ends: 104 [2022-11-19 08:16:35,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:16:35,440 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 36 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:16:35,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 22 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 229 Invalid, 0 Unknown, 26 Unchecked, 1.0s Time] [2022-11-19 08:16:35,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-19 08:16:35,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2022-11-19 08:16:35,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 84 states have (on average 2.130952380952381) internal successors, (179), 85 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:16:35,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 179 transitions. [2022-11-19 08:16:35,443 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 179 transitions. Word has length 16 [2022-11-19 08:16:35,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:16:35,444 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 179 transitions. [2022-11-19 08:16:35,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:16:35,444 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 179 transitions. [2022-11-19 08:16:35,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 08:16:35,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:16:35,444 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:16:35,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-19 08:16:35,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2022-11-19 08:16:35,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-19 08:16:36,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -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_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:16:36,057 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:16:36,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:16:36,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1509736565, now seen corresponding path program 2 times [2022-11-19 08:16:36,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:16:36,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220210947] [2022-11-19 08:16:36,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:16:36,058 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:16:36,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:16:36,059 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:16:36,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-19 08:16:36,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:16:36,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:16:36,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:16:36,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:16:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:16:36,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:16:37,238 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:16:37,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 319 treesize of output 297 [2022-11-19 08:16:37,253 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 249 treesize of output 245 [2022-11-19 08:16:37,268 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 245 treesize of output 241 [2022-11-19 08:16:40,896 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:16:40,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 305 treesize of output 283 [2022-11-19 08:16:40,934 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 246 treesize of output 240 [2022-11-19 08:16:50,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:16:50,935 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:16:50,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220210947] [2022-11-19 08:16:50,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [220210947] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:16:50,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [228737030] [2022-11-19 08:16:50,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:16:50,935 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:16:50,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:16:50,936 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:16:50,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-19 08:16:51,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:16:51,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:16:51,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:16:51,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:16:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:16:51,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:16:52,349 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:16:52,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 305 treesize of output 283 [2022-11-19 08:16:52,374 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 246 treesize of output 240 [2022-11-19 08:17:02,736 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:17:02,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 319 treesize of output 297 [2022-11-19 08:17:02,771 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 249 treesize of output 245 [2022-11-19 08:17:02,806 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 245 treesize of output 241 [2022-11-19 08:17:07,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:17:07,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [228737030] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:17:07,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341592049] [2022-11-19 08:17:07,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:17:07,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:17:07,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:17:07,076 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:17:07,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-19 08:17:07,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:17:07,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:17:07,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:17:07,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:17:07,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:17:07,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:17:08,102 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:17:08,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 319 treesize of output 297 [2022-11-19 08:17:08,119 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 249 treesize of output 245 [2022-11-19 08:17:08,132 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 245 treesize of output 241 [2022-11-19 08:17:12,308 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:17:12,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 305 treesize of output 283 [2022-11-19 08:17:12,344 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 246 treesize of output 240 [2022-11-19 08:17:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:17:20,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341592049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:17:20,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:17:20,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2022-11-19 08:17:20,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063139310] [2022-11-19 08:17:20,520 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:17:20,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 08:17:20,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:17:20,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 08:17:20,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:17:20,521 INFO L87 Difference]: Start difference. First operand 86 states and 179 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:17:21,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:17:21,145 INFO L93 Difference]: Finished difference Result 114 states and 257 transitions. [2022-11-19 08:17:21,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:17:21,147 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-19 08:17:21,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:17:21,148 INFO L225 Difference]: With dead ends: 114 [2022-11-19 08:17:21,148 INFO L226 Difference]: Without dead ends: 114 [2022-11-19 08:17:21,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:17:21,148 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:17:21,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 7 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 65 Unchecked, 0.6s Time] [2022-11-19 08:17:21,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-11-19 08:17:21,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 95. [2022-11-19 08:17:21,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 93 states have (on average 2.2795698924731185) internal successors, (212), 94 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:17:21,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 212 transitions. [2022-11-19 08:17:21,152 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 212 transitions. Word has length 16 [2022-11-19 08:17:21,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:17:21,152 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 212 transitions. [2022-11-19 08:17:21,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:17:21,153 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 212 transitions. [2022-11-19 08:17:21,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 08:17:21,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:17:21,153 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:17:21,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2022-11-19 08:17:21,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:17:21,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-11-19 08:17:21,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:17:21,759 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:17:21,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:17:21,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1689675379, now seen corresponding path program 3 times [2022-11-19 08:17:21,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:17:21,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1703114677] [2022-11-19 08:17:21,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:17:21,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:17:21,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:17:21,761 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:17:21,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-19 08:17:21,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:17:21,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:17:21,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:17:22,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:17:22,483 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:17:22,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 281 treesize of output 259 [2022-11-19 08:17:22,507 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 221 treesize of output 215 [2022-11-19 08:17:22,914 INFO L321 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2022-11-19 08:17:22,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 293 treesize of output 223 [2022-11-19 08:17:22,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 223 treesize of output 219 [2022-11-19 08:17:22,936 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 219 treesize of output 215 [2022-11-19 08:17:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:17:22,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:17:24,885 INFO L321 Elim1Store]: treesize reduction 504, result has 22.3 percent of original size [2022-11-19 08:17:24,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 678 treesize of output 683 [2022-11-19 08:17:24,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 538 treesize of output 528 [2022-11-19 08:17:24,950 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 528 treesize of output 522 [2022-11-19 08:17:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:17:49,674 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:17:49,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1703114677] [2022-11-19 08:17:49,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1703114677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:17:49,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2106227780] [2022-11-19 08:17:49,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:17:49,675 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:17:49,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:17:49,678 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:17:49,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-19 08:17:50,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:17:50,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:17:50,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:17:50,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:17:50,561 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:17:50,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 281 treesize of output 259 [2022-11-19 08:17:50,585 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 221 treesize of output 215 [2022-11-19 08:17:51,006 INFO L321 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2022-11-19 08:17:51,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 293 treesize of output 223 [2022-11-19 08:17:51,018 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 223 treesize of output 219 [2022-11-19 08:17:51,029 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 219 treesize of output 215 [2022-11-19 08:17:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:17:51,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:17:51,922 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:17:51,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 305 treesize of output 283 [2022-11-19 08:17:51,949 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 246 treesize of output 240 [2022-11-19 08:18:03,594 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:18:03,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 319 treesize of output 297 [2022-11-19 08:18:03,640 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 249 treesize of output 245 [2022-11-19 08:18:03,675 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 245 treesize of output 241 [2022-11-19 08:18:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:18:08,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2106227780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:18:08,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087355691] [2022-11-19 08:18:08,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:18:08,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:18:08,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:18:08,086 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:18:08,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-19 08:18:08,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 08:18:08,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:18:08,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:18:08,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:18:08,819 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:18:08,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 281 treesize of output 259 [2022-11-19 08:18:08,849 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 221 treesize of output 215 [2022-11-19 08:18:09,249 INFO L321 Elim1Store]: treesize reduction 216, result has 0.5 percent of original size [2022-11-19 08:18:09,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 293 treesize of output 223 [2022-11-19 08:18:09,267 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 223 treesize of output 219 [2022-11-19 08:18:09,278 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 219 treesize of output 215 [2022-11-19 08:18:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:18:09,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:18:11,415 INFO L321 Elim1Store]: treesize reduction 504, result has 22.3 percent of original size [2022-11-19 08:18:11,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 678 treesize of output 683 [2022-11-19 08:18:11,452 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 538 treesize of output 532 [2022-11-19 08:18:11,473 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 532 treesize of output 522 [2022-11-19 08:18:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:18:39,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087355691] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:18:39,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:18:39,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 14 [2022-11-19 08:18:39,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896503969] [2022-11-19 08:18:39,456 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:18:39,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 08:18:39,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:18:39,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 08:18:39,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:18:39,457 INFO L87 Difference]: Start difference. First operand 95 states and 212 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:18:40,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:18:40,450 INFO L93 Difference]: Finished difference Result 146 states and 320 transitions. [2022-11-19 08:18:40,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:18:40,451 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-19 08:18:40,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:18:40,452 INFO L225 Difference]: With dead ends: 146 [2022-11-19 08:18:40,452 INFO L226 Difference]: Without dead ends: 146 [2022-11-19 08:18:40,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:18:40,453 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 60 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:18:40,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 6 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 150 Invalid, 0 Unknown, 164 Unchecked, 0.9s Time] [2022-11-19 08:18:40,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-11-19 08:18:40,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 98. [2022-11-19 08:18:40,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 96 states have (on average 2.34375) internal successors, (225), 97 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:18:40,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 225 transitions. [2022-11-19 08:18:40,458 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 225 transitions. Word has length 16 [2022-11-19 08:18:40,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:18:40,458 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 225 transitions. [2022-11-19 08:18:40,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:18:40,458 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 225 transitions. [2022-11-19 08:18:40,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 08:18:40,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:18:40,459 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:18:40,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (56)] Forceful destruction successful, exit code 0 [2022-11-19 08:18:40,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 08:18:40,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-11-19 08:18:41,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:18:41,063 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:18:41,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:18:41,064 INFO L85 PathProgramCache]: Analyzing trace with hash -722526545, now seen corresponding path program 1 times [2022-11-19 08:18:41,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:18:41,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1810471364] [2022-11-19 08:18:41,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:41,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:18:41,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:18:41,066 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:18:41,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-19 08:18:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:41,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:18:41,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:18:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:18:41,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:18:42,334 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:18:42,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 305 treesize of output 283 [2022-11-19 08:18:42,365 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 246 treesize of output 240 [2022-11-19 08:18:53,916 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:18:53,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 319 treesize of output 297 [2022-11-19 08:18:53,946 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 249 treesize of output 245 [2022-11-19 08:18:53,974 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 245 treesize of output 241 [2022-11-19 08:18:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:18:57,404 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:18:57,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1810471364] [2022-11-19 08:18:57,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1810471364] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:18:57,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1740902262] [2022-11-19 08:18:57,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:18:57,405 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:18:57,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:18:57,406 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:18:57,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-19 08:18:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:18:57,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:18:57,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:18:58,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:18:58,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:18:58,952 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:18:58,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 319 treesize of output 297 [2022-11-19 08:18:58,970 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 249 treesize of output 245 [2022-11-19 08:18:58,987 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 245 treesize of output 241 [2022-11-19 08:19:05,135 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:19:05,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 305 treesize of output 283 [2022-11-19 08:19:05,176 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 246 treesize of output 240 [2022-11-19 08:19:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:19:16,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1740902262] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:19:16,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845615170] [2022-11-19 08:19:16,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:19:16,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:19:16,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:19:16,953 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:19:16,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-19 08:19:17,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:19:17,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:19:17,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:19:17,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:19:17,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:19:18,309 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:19:18,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 319 treesize of output 297 [2022-11-19 08:19:18,326 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 249 treesize of output 245 [2022-11-19 08:19:18,350 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 245 treesize of output 241 [2022-11-19 08:19:23,513 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2022-11-19 08:19:23,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 305 treesize of output 283 [2022-11-19 08:19:23,558 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 246 treesize of output 240 [2022-11-19 08:19:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:19:33,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845615170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:19:33,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:19:33,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2022-11-19 08:19:33,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289200978] [2022-11-19 08:19:33,627 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:19:33,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 08:19:33,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:19:33,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 08:19:33,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:19:33,628 INFO L87 Difference]: Start difference. First operand 98 states and 225 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:19:34,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:19:34,574 INFO L93 Difference]: Finished difference Result 125 states and 284 transitions. [2022-11-19 08:19:34,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:19:34,576 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-19 08:19:34,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:19:34,577 INFO L225 Difference]: With dead ends: 125 [2022-11-19 08:19:34,577 INFO L226 Difference]: Without dead ends: 125 [2022-11-19 08:19:34,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:19:34,578 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:19:34,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 9 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 117 Invalid, 0 Unknown, 34 Unchecked, 0.9s Time] [2022-11-19 08:19:34,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-19 08:19:34,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2022-11-19 08:19:34,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 108 states have (on average 2.2777777777777777) internal successors, (246), 109 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:19:34,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 246 transitions. [2022-11-19 08:19:34,583 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 246 transitions. Word has length 16 [2022-11-19 08:19:34,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:19:34,583 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 246 transitions. [2022-11-19 08:19:34,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:19:34,584 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 246 transitions. [2022-11-19 08:19:34,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 08:19:34,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:19:34,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:19:34,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2022-11-19 08:19:34,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-11-19 08:19:35,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:19:35,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:19:35,190 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 51 more)] === [2022-11-19 08:19:35,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:19:35,190 INFO L85 PathProgramCache]: Analyzing trace with hash -894083963, now seen corresponding path program 4 times [2022-11-19 08:19:35,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:19:35,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122096458] [2022-11-19 08:19:35,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 08:19:35,191 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:19:35,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:19:35,192 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:19:35,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99803fab-8ddc-4a55-bf0f-32df9715ab58/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-19 08:19:35,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 08:19:35,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:19:35,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:19:35,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:19:36,123 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 786 treesize of output 774 [2022-11-19 08:19:36,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 774 treesize of output 766 [2022-11-19 08:20:28,215 WARN L233 SmtUtils]: Spent 12.15s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 08:20:30,155 INFO L321 Elim1Store]: treesize reduction 972, result has 1.3 percent of original size [2022-11-19 08:20:30,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 28 new quantified variables, introduced 120 case distinctions, treesize of input 5692 treesize of output 274 [2022-11-19 08:20:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:20:32,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:20:57,427 WARN L233 SmtUtils]: Spent 20.00s on a formula simplification. DAG size of input: 884 DAG size of output: 233 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-19 08:20:57,429 INFO L321 Elim1Store]: treesize reduction 2520, result has 22.2 percent of original size [2022-11-19 08:20:57,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 24 select indices, 24 select index equivalence classes, 0 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 276 case distinctions, treesize of input 967 treesize of output 1442 [2022-11-19 08:20:57,520 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 713 treesize of output 701 [2022-11-19 08:20:57,632 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 701 treesize of output 693