./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 08:15:24,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:15:24,766 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:15:24,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:15:24,779 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:15:24,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:15:24,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:15:24,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:15:24,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:15:24,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:15:24,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:15:24,785 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:15:24,786 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:15:24,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:15:24,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:15:24,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:15:24,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:15:24,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:15:24,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:15:24,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:15:24,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:15:24,794 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:15:24,795 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:15:24,795 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:15:24,798 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:15:24,798 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:15:24,798 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:15:24,799 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:15:24,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:15:24,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:15:24,800 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:15:24,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:15:24,801 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:15:24,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:15:24,803 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:15:24,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:15:24,803 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:15:24,803 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:15:24,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:15:24,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:15:24,805 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:15:24,805 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 08:15:24,820 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:15:24,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:15:24,820 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:15:24,821 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:15:24,821 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:15:24,821 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:15:24,821 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:15:24,822 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:15:24,822 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:15:24,822 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:15:24,822 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:15:24,822 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:15:24,822 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:15:24,822 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:15:24,823 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:15:24,823 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:15:24,823 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:15:24,823 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:15:24,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 08:15:24,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 08:15:24,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:15:24,824 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:15:24,824 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 08:15:24,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:15:24,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:15:24,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:15:24,825 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 08:15:24,825 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 08:15:24,825 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 08:15:24,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:15:24,826 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 08:15:24,826 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:15:24,826 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:15:24,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:15:24,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:15:24,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:15:24,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:15:24,827 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:15:24,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:15:24,827 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:15:24,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:15:24,827 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:15:24,827 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_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 [2022-12-14 08:15:24,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:15:25,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:15:25,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:15:25,010 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:15:25,011 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:15:25,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2022-12-14 08:15:27,690 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:15:27,839 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:15:27,839 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2022-12-14 08:15:27,845 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/data/b1894713a/52214878f75f4ab29af744530f52c251/FLAG78e8a793a [2022-12-14 08:15:27,857 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/data/b1894713a/52214878f75f4ab29af744530f52c251 [2022-12-14 08:15:27,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:15:27,861 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:15:27,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:15:27,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:15:27,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:15:27,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:15:27" (1/1) ... [2022-12-14 08:15:27,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30194fd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:15:27, skipping insertion in model container [2022-12-14 08:15:27,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:15:27" (1/1) ... [2022-12-14 08:15:27,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:15:27,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:15:28,025 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:28,027 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:28,028 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:28,028 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:28,030 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:28,030 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:28,031 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:28,032 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:28,032 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:28,033 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:28,033 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:28,033 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:28,034 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:28,035 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:28,038 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:28,038 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:28,039 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:28,039 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:28,039 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:28,040 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:28,040 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:28,041 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:28,044 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2022-12-14 08:15:28,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:15:28,060 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-14 08:15:28,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7eb6f72f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:15:28, skipping insertion in model container [2022-12-14 08:15:28,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:15:28,061 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 08:15:28,062 INFO L158 Benchmark]: Toolchain (without parser) took 200.82ms. Allocated memory is still 159.4MB. Free memory was 124.5MB in the beginning and 113.2MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 08:15:28,063 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 159.4MB. Free memory is still 102.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 08:15:28,063 INFO L158 Benchmark]: CACSL2BoogieTranslator took 198.74ms. Allocated memory is still 159.4MB. Free memory was 124.1MB in the beginning and 113.2MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 08:15:28,064 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 159.4MB. Free memory is still 102.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 198.74ms. Allocated memory is still 159.4MB. Free memory was 124.1MB in the beginning and 113.2MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 153]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 08:15:29,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:15:29,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:15:29,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:15:29,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:15:29,505 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:15:29,507 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:15:29,508 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:15:29,510 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:15:29,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:15:29,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:15:29,513 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:15:29,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:15:29,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:15:29,515 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:15:29,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:15:29,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:15:29,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:15:29,519 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:15:29,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:15:29,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:15:29,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:15:29,524 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:15:29,525 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:15:29,528 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:15:29,529 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:15:29,529 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:15:29,530 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:15:29,530 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:15:29,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:15:29,531 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:15:29,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:15:29,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:15:29,540 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:15:29,540 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:15:29,541 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:15:29,541 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:15:29,542 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:15:29,542 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:15:29,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:15:29,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:15:29,544 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 08:15:29,566 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:15:29,566 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:15:29,567 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:15:29,567 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:15:29,568 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:15:29,568 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:15:29,568 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:15:29,568 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:15:29,568 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:15:29,568 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:15:29,569 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:15:29,569 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:15:29,569 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 08:15:29,570 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 08:15:29,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:15:29,570 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:15:29,570 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 08:15:29,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:15:29,570 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:15:29,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:15:29,571 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 08:15:29,571 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 08:15:29,571 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 08:15:29,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:15:29,571 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 08:15:29,572 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 08:15:29,572 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 08:15:29,572 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:15:29,572 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:15:29,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:15:29,572 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 08:15:29,573 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:15:29,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:15:29,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:15:29,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:15:29,573 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 08:15:29,573 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 08:15:29,574 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:15:29,574 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 08:15:29,574 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_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d721a74d879c75d156b7dfbd9383140c70ef6831602ea84a0f8988cd7fdc0c32 [2022-12-14 08:15:29,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:15:29,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:15:29,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:15:29,803 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:15:29,803 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:15:29,804 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2022-12-14 08:15:32,403 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:15:32,572 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:15:32,573 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2022-12-14 08:15:32,578 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/data/f73c5b853/85b8849dc78b4520bc97a6cf0ec07090/FLAG610ccf759 [2022-12-14 08:15:32,590 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/data/f73c5b853/85b8849dc78b4520bc97a6cf0ec07090 [2022-12-14 08:15:32,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:15:32,594 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:15:32,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:15:32,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:15:32,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:15:32,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:15:32" (1/1) ... [2022-12-14 08:15:32,599 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@639428a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:15:32, skipping insertion in model container [2022-12-14 08:15:32,599 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:15:32" (1/1) ... [2022-12-14 08:15:32,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:15:32,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:15:32,747 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,750 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,751 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,751 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,753 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,754 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,755 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,757 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,757 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,757 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,758 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,758 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,759 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,760 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,764 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,765 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,765 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,766 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,766 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,767 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,767 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,768 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,773 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2022-12-14 08:15:32,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:15:32,799 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 08:15:32,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:15:32,807 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,808 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,809 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,809 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,809 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,810 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,810 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,811 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,811 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,811 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,811 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,812 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,812 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,813 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,814 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,814 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,814 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,815 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,815 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,816 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,816 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,816 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,819 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2022-12-14 08:15:32,822 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:15:32,826 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:15:32,835 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,836 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,836 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,836 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,836 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,837 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,837 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,838 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,838 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,838 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,838 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,839 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,839 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,840 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,841 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,841 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,842 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,842 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,842 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,842 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,843 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 08:15:32,843 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 08:15:32,845 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c[3770,3783] [2022-12-14 08:15:32,848 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:15:32,860 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:15:32,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:15:32 WrapperNode [2022-12-14 08:15:32,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:15:32,861 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:15:32,861 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:15:32,861 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:15:32,866 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:15:32" (1/1) ... [2022-12-14 08:15:32,881 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:15:32" (1/1) ... [2022-12-14 08:15:32,911 INFO L138 Inliner]: procedures = 29, calls = 73, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 233 [2022-12-14 08:15:32,911 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:15:32,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:15:32,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:15:32,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:15:32,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:15:32" (1/1) ... [2022-12-14 08:15:32,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:15:32" (1/1) ... [2022-12-14 08:15:32,925 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:15:32" (1/1) ... [2022-12-14 08:15:32,926 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:15:32" (1/1) ... [2022-12-14 08:15:32,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:15:32" (1/1) ... [2022-12-14 08:15:32,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:15:32" (1/1) ... [2022-12-14 08:15:32,941 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:15:32" (1/1) ... [2022-12-14 08:15:32,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:15:32" (1/1) ... [2022-12-14 08:15:32,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:15:32,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:15:32,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:15:32,947 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:15:32,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:15:32" (1/1) ... [2022-12-14 08:15:32,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:15:32,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:15:32,972 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:15:32,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:15:33,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:15:33,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 08:15:33,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 08:15:33,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 08:15:33,006 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 08:15:33,006 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 08:15:33,007 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 08:15:33,007 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 08:15:33,007 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 08:15:33,007 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 08:15:33,007 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-12-14 08:15:33,007 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-12-14 08:15:33,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 08:15:33,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 08:15:33,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 08:15:33,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:15:33,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:15:33,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 08:15:33,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 08:15:33,009 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 08:15:33,113 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:15:33,115 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:15:33,594 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:15:33,735 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:15:33,735 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 08:15:33,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:15:33 BoogieIcfgContainer [2022-12-14 08:15:33,737 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:15:33,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:15:33,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:15:33,740 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:15:33,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:15:32" (1/3) ... [2022-12-14 08:15:33,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704108b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:15:33, skipping insertion in model container [2022-12-14 08:15:33,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:15:32" (2/3) ... [2022-12-14 08:15:33,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704108b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:15:33, skipping insertion in model container [2022-12-14 08:15:33,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:15:33" (3/3) ... [2022-12-14 08:15:33,742 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-equiv.wvr.c [2022-12-14 08:15:33,756 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:15:33,756 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-12-14 08:15:33,756 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 08:15:33,834 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2022-12-14 08:15:33,866 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 08:15:33,878 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 225 places, 226 transitions, 496 flow [2022-12-14 08:15:33,880 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 225 places, 226 transitions, 496 flow [2022-12-14 08:15:33,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 226 transitions, 496 flow [2022-12-14 08:15:33,930 INFO L130 PetriNetUnfolder]: 14/209 cut-off events. [2022-12-14 08:15:33,931 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-14 08:15:33,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 209 events. 14/209 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 269 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 172. Up to 3 conditions per place. [2022-12-14 08:15:33,937 INFO L119 LiptonReduction]: Number of co-enabled transitions 4296 [2022-12-14 08:15:48,570 INFO L134 LiptonReduction]: Checked pairs total: 16945 [2022-12-14 08:15:48,570 INFO L136 LiptonReduction]: Total number of compositions: 207 [2022-12-14 08:15:48,579 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 86 places, 79 transitions, 202 flow [2022-12-14 08:15:48,702 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 4372 states, 3910 states have (on average 4.443989769820972) internal successors, (17376), 4371 states have internal predecessors, (17376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:48,715 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:15:48,719 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;@81cf577, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:15:48,719 INFO L358 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2022-12-14 08:15:48,742 INFO L276 IsEmpty]: Start isEmpty. Operand has 4372 states, 3910 states have (on average 4.443989769820972) internal successors, (17376), 4371 states have internal predecessors, (17376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:48,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 08:15:48,746 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:15:48,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 08:15:48,747 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 08:15:48,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:15:48,750 INFO L85 PathProgramCache]: Analyzing trace with hash 36119, now seen corresponding path program 1 times [2022-12-14 08:15:48,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:15:48,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209219557] [2022-12-14 08:15:48,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:15:48,760 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 [2022-12-14 08:15:48,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:15:48,761 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:15:48,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 08:15:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:15:48,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:15:48,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:15:48,913 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 08:15:48,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2022-12-14 08:15:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:15:48,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:15:48,933 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:15:48,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209219557] [2022-12-14 08:15:48,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209219557] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:15:48,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:15:48,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:15:48,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760481547] [2022-12-14 08:15:48,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:15:48,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:15:48,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:15:48,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:15:48,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:15:48,966 INFO L87 Difference]: Start difference. First operand has 4372 states, 3910 states have (on average 4.443989769820972) internal successors, (17376), 4371 states have internal predecessors, (17376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:49,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:15:49,274 INFO L93 Difference]: Finished difference Result 4370 states and 17374 transitions. [2022-12-14 08:15:49,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:15:49,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 08:15:49,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:15:49,327 INFO L225 Difference]: With dead ends: 4370 [2022-12-14 08:15:49,327 INFO L226 Difference]: Without dead ends: 4370 [2022-12-14 08:15:49,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:15:49,331 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 54 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:15:49,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 9 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:15:49,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4370 states. [2022-12-14 08:15:49,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4370 to 4370. [2022-12-14 08:15:49,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4370 states, 3910 states have (on average 4.443478260869565) internal successors, (17374), 4369 states have internal predecessors, (17374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:49,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4370 states to 4370 states and 17374 transitions. [2022-12-14 08:15:49,604 INFO L78 Accepts]: Start accepts. Automaton has 4370 states and 17374 transitions. Word has length 2 [2022-12-14 08:15:49,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:15:49,605 INFO L495 AbstractCegarLoop]: Abstraction has 4370 states and 17374 transitions. [2022-12-14 08:15:49,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:49,605 INFO L276 IsEmpty]: Start isEmpty. Operand 4370 states and 17374 transitions. [2022-12-14 08:15:49,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 08:15:49,606 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:15:49,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 08:15:49,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:15:49,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:15:49,807 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 08:15:49,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:15:49,807 INFO L85 PathProgramCache]: Analyzing trace with hash 36120, now seen corresponding path program 1 times [2022-12-14 08:15:49,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:15:49,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437097394] [2022-12-14 08:15:49,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:15:49,808 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:15:49,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:15:49,809 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:15:49,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 08:15:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:15:49,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 08:15:49,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:15:49,952 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:15:49,952 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 [2022-12-14 08:15:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:15:49,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:15:49,971 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:15:49,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437097394] [2022-12-14 08:15:49,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437097394] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:15:49,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:15:49,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:15:49,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259653118] [2022-12-14 08:15:49,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:15:49,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:15:49,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:15:49,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:15:49,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:15:49,974 INFO L87 Difference]: Start difference. First operand 4370 states and 17374 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:50,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:15:50,352 INFO L93 Difference]: Finished difference Result 4400 states and 17446 transitions. [2022-12-14 08:15:50,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:15:50,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 08:15:50,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:15:50,401 INFO L225 Difference]: With dead ends: 4400 [2022-12-14 08:15:50,402 INFO L226 Difference]: Without dead ends: 4400 [2022-12-14 08:15:50,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:15:50,403 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:15:50,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 19 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:15:50,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4400 states. [2022-12-14 08:15:50,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4400 to 4371. [2022-12-14 08:15:50,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4371 states, 3911 states have (on average 4.443364868320122) internal successors, (17378), 4370 states have internal predecessors, (17378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4371 states to 4371 states and 17378 transitions. [2022-12-14 08:15:50,586 INFO L78 Accepts]: Start accepts. Automaton has 4371 states and 17378 transitions. Word has length 2 [2022-12-14 08:15:50,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:15:50,586 INFO L495 AbstractCegarLoop]: Abstraction has 4371 states and 17378 transitions. [2022-12-14 08:15:50,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:50,587 INFO L276 IsEmpty]: Start isEmpty. Operand 4371 states and 17378 transitions. [2022-12-14 08:15:50,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 08:15:50,587 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:15:50,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 08:15:50,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 08:15:50,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:15:50,789 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 08:15:50,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:15:50,789 INFO L85 PathProgramCache]: Analyzing trace with hash 36268, now seen corresponding path program 1 times [2022-12-14 08:15:50,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:15:50,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83623604] [2022-12-14 08:15:50,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:15:50,790 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:15:50,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:15:50,791 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:15:50,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 08:15:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:15:50,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 08:15:50,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:15:50,925 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-14 08:15:50,926 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 [2022-12-14 08:15:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:15:50,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:15:50,968 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:15:50,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83623604] [2022-12-14 08:15:50,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [83623604] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:15:50,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:15:50,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:15:50,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800190878] [2022-12-14 08:15:50,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:15:50,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:15:50,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:15:50,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:15:50,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:15:50,970 INFO L87 Difference]: Start difference. First operand 4371 states and 17378 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:51,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:15:51,234 INFO L93 Difference]: Finished difference Result 3545 states and 13716 transitions. [2022-12-14 08:15:51,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:15:51,235 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 08:15:51,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:15:51,263 INFO L225 Difference]: With dead ends: 3545 [2022-12-14 08:15:51,263 INFO L226 Difference]: Without dead ends: 3545 [2022-12-14 08:15:51,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:15:51,264 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 52 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:15:51,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 9 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:15:51,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3545 states. [2022-12-14 08:15:51,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3545 to 3545. [2022-12-14 08:15:51,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3545 states, 3206 states have (on average 4.278228321896444) internal successors, (13716), 3544 states have internal predecessors, (13716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:51,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3545 states to 3545 states and 13716 transitions. [2022-12-14 08:15:51,414 INFO L78 Accepts]: Start accepts. Automaton has 3545 states and 13716 transitions. Word has length 2 [2022-12-14 08:15:51,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:15:51,415 INFO L495 AbstractCegarLoop]: Abstraction has 3545 states and 13716 transitions. [2022-12-14 08:15:51,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:51,415 INFO L276 IsEmpty]: Start isEmpty. Operand 3545 states and 13716 transitions. [2022-12-14 08:15:51,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 08:15:51,415 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:15:51,415 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 08:15:51,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 08:15:51,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:15:51,617 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 08:15:51,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:15:51,618 INFO L85 PathProgramCache]: Analyzing trace with hash 36270, now seen corresponding path program 1 times [2022-12-14 08:15:51,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:15:51,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528619491] [2022-12-14 08:15:51,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:15:51,619 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:15:51,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:15:51,621 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:15:51,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 08:15:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:15:51,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 08:15:51,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:15:51,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:51,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:51,853 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 08:15:51,854 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 [2022-12-14 08:15:51,867 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 [2022-12-14 08:15:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:15:51,892 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:15:51,892 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:15:51,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528619491] [2022-12-14 08:15:51,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528619491] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:15:51,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:15:51,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:15:51,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763602298] [2022-12-14 08:15:51,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:15:51,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:15:51,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:15:51,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:15:51,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:15:51,894 INFO L87 Difference]: Start difference. First operand 3545 states and 13716 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:52,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:15:52,081 INFO L93 Difference]: Finished difference Result 2709 states and 10029 transitions. [2022-12-14 08:15:52,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:15:52,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 08:15:52,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:15:52,091 INFO L225 Difference]: With dead ends: 2709 [2022-12-14 08:15:52,091 INFO L226 Difference]: Without dead ends: 2709 [2022-12-14 08:15:52,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:15:52,092 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 59 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:15:52,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 7 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:15:52,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2709 states. [2022-12-14 08:15:52,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2709 to 2709. [2022-12-14 08:15:52,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2709 states, 2494 states have (on average 4.021251002405774) internal successors, (10029), 2708 states have internal predecessors, (10029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:52,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2709 states to 2709 states and 10029 transitions. [2022-12-14 08:15:52,157 INFO L78 Accepts]: Start accepts. Automaton has 2709 states and 10029 transitions. Word has length 2 [2022-12-14 08:15:52,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:15:52,157 INFO L495 AbstractCegarLoop]: Abstraction has 2709 states and 10029 transitions. [2022-12-14 08:15:52,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:52,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2709 states and 10029 transitions. [2022-12-14 08:15:52,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 08:15:52,158 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:15:52,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 08:15:52,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-14 08:15:52,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:15:52,359 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 08:15:52,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:15:52,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1124344, now seen corresponding path program 1 times [2022-12-14 08:15:52,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:15:52,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [536659746] [2022-12-14 08:15:52,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:15:52,362 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:15:52,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:15:52,365 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:15:52,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-14 08:15:52,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:15:52,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 08:15:52,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:15:52,513 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:15:52,513 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 [2022-12-14 08:15:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:15:52,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:15:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:15:52,751 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:15:52,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [536659746] [2022-12-14 08:15:52,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [536659746] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:15:52,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1899724106] [2022-12-14 08:15:52,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:15:52,751 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:15:52,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:15:52,752 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:15:52,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-12-14 08:15:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:15:52,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 08:15:52,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:15:52,923 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:15:52,924 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 [2022-12-14 08:15:52,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:15:52,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:15:53,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:15:53,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1899724106] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:15:53,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164263118] [2022-12-14 08:15:53,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:15:53,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:15:53,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:15:53,011 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:15:53,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 08:15:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:15:53,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 08:15:53,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:15:53,106 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:15:53,106 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 [2022-12-14 08:15:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:15:53,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:15:53,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:15:53,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164263118] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:15:53,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:15:53,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-12-14 08:15:53,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729675472] [2022-12-14 08:15:53,246 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:15:53,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 08:15:53,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:15:53,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 08:15:53,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:15:53,247 INFO L87 Difference]: Start difference. First operand 2709 states and 10029 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:54,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:15:54,613 INFO L93 Difference]: Finished difference Result 2779 states and 10186 transitions. [2022-12-14 08:15:54,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:15:54,614 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 08:15:54,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:15:54,625 INFO L225 Difference]: With dead ends: 2779 [2022-12-14 08:15:54,625 INFO L226 Difference]: Without dead ends: 2779 [2022-12-14 08:15:54,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-14 08:15:54,626 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 99 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:15:54,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 47 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 08:15:54,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2779 states. [2022-12-14 08:15:54,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2779 to 2712. [2022-12-14 08:15:54,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2497 states have (on average 4.018822587104525) internal successors, (10035), 2711 states have internal predecessors, (10035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:54,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 10035 transitions. [2022-12-14 08:15:54,697 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 10035 transitions. Word has length 3 [2022-12-14 08:15:54,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:15:54,697 INFO L495 AbstractCegarLoop]: Abstraction has 2712 states and 10035 transitions. [2022-12-14 08:15:54,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:54,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 10035 transitions. [2022-12-14 08:15:54,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 08:15:54,698 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:15:54,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 08:15:54,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-14 08:15:54,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 08:15:55,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2022-12-14 08:15:55,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 08:15:55,301 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 08:15:55,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:15:55,302 INFO L85 PathProgramCache]: Analyzing trace with hash -837352874, now seen corresponding path program 1 times [2022-12-14 08:15:55,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:15:55,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1254673242] [2022-12-14 08:15:55,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:15:55,304 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:15:55,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:15:55,307 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:15:55,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-12-14 08:15:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:15:55,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 08:15:55,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:15:55,394 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2022-12-14 08:15:55,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 22 [2022-12-14 08:15:55,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:15:55,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:15:55,415 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:15:55,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1254673242] [2022-12-14 08:15:55,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1254673242] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:15:55,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:15:55,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:15:55,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211765374] [2022-12-14 08:15:55,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:15:55,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:15:55,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:15:55,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:15:55,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:15:55,416 INFO L87 Difference]: Start difference. First operand 2712 states and 10035 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:55,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:15:55,620 INFO L93 Difference]: Finished difference Result 2589 states and 9561 transitions. [2022-12-14 08:15:55,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:15:55,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 08:15:55,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:15:55,631 INFO L225 Difference]: With dead ends: 2589 [2022-12-14 08:15:55,631 INFO L226 Difference]: Without dead ends: 2589 [2022-12-14 08:15:55,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:15:55,632 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 50 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:15:55,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 8 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:15:55,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2022-12-14 08:15:55,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 2563. [2022-12-14 08:15:55,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2388 states have (on average 3.981993299832496) internal successors, (9509), 2562 states have internal predecessors, (9509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:55,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 9509 transitions. [2022-12-14 08:15:55,703 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 9509 transitions. Word has length 6 [2022-12-14 08:15:55,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:15:55,703 INFO L495 AbstractCegarLoop]: Abstraction has 2563 states and 9509 transitions. [2022-12-14 08:15:55,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:55,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 9509 transitions. [2022-12-14 08:15:55,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 08:15:55,703 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:15:55,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 08:15:55,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-12-14 08:15:55,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:15:55,904 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 08:15:55,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:15:55,905 INFO L85 PathProgramCache]: Analyzing trace with hash -837352873, now seen corresponding path program 1 times [2022-12-14 08:15:55,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:15:55,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [325570680] [2022-12-14 08:15:55,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:15:55,905 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:15:55,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:15:55,906 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:15:55,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-14 08:15:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:15:55,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 08:15:55,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:15:55,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:15:55,984 INFO L321 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2022-12-14 08:15:55,985 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 [2022-12-14 08:15:55,992 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 39 treesize of output 37 [2022-12-14 08:15:56,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:15:56,018 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:15:56,019 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:15:56,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [325570680] [2022-12-14 08:15:56,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [325570680] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:15:56,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:15:56,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:15:56,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191095796] [2022-12-14 08:15:56,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:15:56,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:15:56,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:15:56,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:15:56,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:15:56,020 INFO L87 Difference]: Start difference. First operand 2563 states and 9509 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:56,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:15:56,155 INFO L93 Difference]: Finished difference Result 2391 states and 8924 transitions. [2022-12-14 08:15:56,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:15:56,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 08:15:56,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:15:56,162 INFO L225 Difference]: With dead ends: 2391 [2022-12-14 08:15:56,162 INFO L226 Difference]: Without dead ends: 2391 [2022-12-14 08:15:56,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:15:56,163 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 53 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:15:56,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 6 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:15:56,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2022-12-14 08:15:56,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 2391. [2022-12-14 08:15:56,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2391 states, 2260 states have (on average 3.9486725663716813) internal successors, (8924), 2390 states have internal predecessors, (8924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:56,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2391 states to 2391 states and 8924 transitions. [2022-12-14 08:15:56,204 INFO L78 Accepts]: Start accepts. Automaton has 2391 states and 8924 transitions. Word has length 6 [2022-12-14 08:15:56,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:15:56,204 INFO L495 AbstractCegarLoop]: Abstraction has 2391 states and 8924 transitions. [2022-12-14 08:15:56,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:15:56,204 INFO L276 IsEmpty]: Start isEmpty. Operand 2391 states and 8924 transitions. [2022-12-14 08:15:56,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 08:15:56,204 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:15:56,205 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 08:15:56,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-14 08:15:56,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:15:56,406 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 08:15:56,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:15:56,406 INFO L85 PathProgramCache]: Analyzing trace with hash -859814632, now seen corresponding path program 2 times [2022-12-14 08:15:56,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:15:56,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776317519] [2022-12-14 08:15:56,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:15:56,407 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:15:56,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:15:56,408 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:15:56,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-14 08:15:56,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:15:56,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:15:56,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 08:15:56,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:15:56,562 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:15:56,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 08:15:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:15:56,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:15:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:15:57,263 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:15:57,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776317519] [2022-12-14 08:15:57,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776317519] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:15:57,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1778807596] [2022-12-14 08:15:57,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:15:57,263 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:15:57,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:15:57,264 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:15:57,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-12-14 08:15:57,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:15:57,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:15:57,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 08:15:57,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:15:57,463 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:15:57,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 08:15:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:15:57,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:15:58,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:15:58,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1778807596] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:15:58,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789132611] [2022-12-14 08:15:58,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:15:58,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:15:58,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:15:58,326 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:15:58,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 08:15:58,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:15:58,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:15:58,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 08:15:58,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:15:58,458 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:15:58,458 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 [2022-12-14 08:15:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:15:58,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:15:58,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:15:58,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789132611] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:15:58,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:15:58,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-12-14 08:15:58,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306009717] [2022-12-14 08:15:58,648 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:15:58,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 08:15:58,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:15:58,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 08:15:58,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-12-14 08:15:58,649 INFO L87 Difference]: Start difference. First operand 2391 states and 8924 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:03,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:16:03,897 INFO L93 Difference]: Finished difference Result 2560 states and 9308 transitions. [2022-12-14 08:16:03,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 08:16:03,898 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 08:16:03,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:16:03,904 INFO L225 Difference]: With dead ends: 2560 [2022-12-14 08:16:03,904 INFO L226 Difference]: Without dead ends: 2560 [2022-12-14 08:16:03,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2022-12-14 08:16:03,905 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 532 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-12-14 08:16:03,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 102 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-12-14 08:16:03,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2560 states. [2022-12-14 08:16:03,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2560 to 2397. [2022-12-14 08:16:03,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2397 states, 2266 states have (on average 3.9435127978817297) internal successors, (8936), 2396 states have internal predecessors, (8936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:03,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 8936 transitions. [2022-12-14 08:16:03,946 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 8936 transitions. Word has length 6 [2022-12-14 08:16:03,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:16:03,946 INFO L495 AbstractCegarLoop]: Abstraction has 2397 states and 8936 transitions. [2022-12-14 08:16:03,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:03,946 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 8936 transitions. [2022-12-14 08:16:03,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 08:16:03,946 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:16:03,946 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:16:03,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-12-14 08:16:04,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2022-12-14 08:16:04,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 08:16:04,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:16:04,550 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 08:16:04,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:16:04,551 INFO L85 PathProgramCache]: Analyzing trace with hash -194875970, now seen corresponding path program 1 times [2022-12-14 08:16:04,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:16:04,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112940756] [2022-12-14 08:16:04,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:16:04,553 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:04,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:16:04,555 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:16:04,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-14 08:16:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:16:04,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 08:16:04,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:16:04,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 08:16:04,658 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 08:16:04,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 08:16:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:04,663 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:16:04,663 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:16:04,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112940756] [2022-12-14 08:16:04,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112940756] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:16:04,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:16:04,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:16:04,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876851595] [2022-12-14 08:16:04,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:16:04,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:16:04,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:16:04,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:16:04,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:16:04,665 INFO L87 Difference]: Start difference. First operand 2397 states and 8936 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) [2022-12-14 08:16:04,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:16:04,832 INFO L93 Difference]: Finished difference Result 2033 states and 7378 transitions. [2022-12-14 08:16:04,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:16:04,832 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 [2022-12-14 08:16:04,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:16:04,838 INFO L225 Difference]: With dead ends: 2033 [2022-12-14 08:16:04,838 INFO L226 Difference]: Without dead ends: 2033 [2022-12-14 08:16:04,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:16:04,838 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 41 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:16:04,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 11 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:16:04,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2022-12-14 08:16:04,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 2033. [2022-12-14 08:16:04,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2033 states, 1932 states have (on average 3.818840579710145) internal successors, (7378), 2032 states have internal predecessors, (7378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:04,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2033 states to 2033 states and 7378 transitions. [2022-12-14 08:16:04,874 INFO L78 Accepts]: Start accepts. Automaton has 2033 states and 7378 transitions. Word has length 7 [2022-12-14 08:16:04,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:16:04,875 INFO L495 AbstractCegarLoop]: Abstraction has 2033 states and 7378 transitions. [2022-12-14 08:16:04,875 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) [2022-12-14 08:16:04,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2033 states and 7378 transitions. [2022-12-14 08:16:04,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 08:16:04,875 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:16:04,875 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:16:04,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-14 08:16:05,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:05,076 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 08:16:05,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:16:05,077 INFO L85 PathProgramCache]: Analyzing trace with hash -194875969, now seen corresponding path program 1 times [2022-12-14 08:16:05,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:16:05,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1659434010] [2022-12-14 08:16:05,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:16:05,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:05,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:16:05,078 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:16:05,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-14 08:16:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:16:05,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 08:16:05,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:16:05,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 08:16:05,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 08:16:05,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:05,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 08:16:05,181 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 08:16:05,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 08:16:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:05,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:16:05,192 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:16:05,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1659434010] [2022-12-14 08:16:05,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1659434010] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:16:05,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:16:05,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:16:05,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701178463] [2022-12-14 08:16:05,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:16:05,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:16:05,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:16:05,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:16:05,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:16:05,193 INFO L87 Difference]: Start difference. First operand 2033 states and 7378 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:05,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:16:05,465 INFO L93 Difference]: Finished difference Result 1669 states and 5820 transitions. [2022-12-14 08:16:05,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:16:05,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 08:16:05,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:16:05,469 INFO L225 Difference]: With dead ends: 1669 [2022-12-14 08:16:05,469 INFO L226 Difference]: Without dead ends: 1669 [2022-12-14 08:16:05,469 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 [2022-12-14 08:16:05,469 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:16:05,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 13 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:16:05,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2022-12-14 08:16:05,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1669. [2022-12-14 08:16:05,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1598 states have (on average 3.642052565707134) internal successors, (5820), 1668 states have internal predecessors, (5820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:05,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5820 transitions. [2022-12-14 08:16:05,493 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5820 transitions. Word has length 7 [2022-12-14 08:16:05,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:16:05,493 INFO L495 AbstractCegarLoop]: Abstraction has 1669 states and 5820 transitions. [2022-12-14 08:16:05,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:05,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5820 transitions. [2022-12-14 08:16:05,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 08:16:05,493 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:16:05,494 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:16:05,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 08:16:05,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:05,695 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 08:16:05,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:16:05,696 INFO L85 PathProgramCache]: Analyzing trace with hash -408567641, now seen corresponding path program 1 times [2022-12-14 08:16:05,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:16:05,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305865522] [2022-12-14 08:16:05,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:16:05,699 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:05,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:16:05,702 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:16:05,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-14 08:16:05,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:16:05,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 08:16:05,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:16:05,859 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-12-14 08:16:05,859 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 16 treesize of output 31 [2022-12-14 08:16:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:05,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:16:05,989 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:16:05,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305865522] [2022-12-14 08:16:05,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305865522] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:16:05,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:16:05,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:16:05,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635520449] [2022-12-14 08:16:05,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:16:05,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:16:05,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:16:05,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:16:05,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:16:05,990 INFO L87 Difference]: Start difference. First operand 1669 states and 5820 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:06,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:16:06,424 INFO L93 Difference]: Finished difference Result 1673 states and 5832 transitions. [2022-12-14 08:16:06,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:16:06,425 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 08:16:06,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:16:06,428 INFO L225 Difference]: With dead ends: 1673 [2022-12-14 08:16:06,428 INFO L226 Difference]: Without dead ends: 1673 [2022-12-14 08:16:06,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:16:06,429 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:16:06,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 27 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:16:06,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2022-12-14 08:16:06,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1671. [2022-12-14 08:16:06,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1600 states have (on average 3.643125) internal successors, (5829), 1670 states have internal predecessors, (5829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:06,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5829 transitions. [2022-12-14 08:16:06,453 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5829 transitions. Word has length 9 [2022-12-14 08:16:06,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:16:06,453 INFO L495 AbstractCegarLoop]: Abstraction has 1671 states and 5829 transitions. [2022-12-14 08:16:06,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:06,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5829 transitions. [2022-12-14 08:16:06,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 08:16:06,454 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:16:06,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:16:06,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 08:16:06,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:06,655 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 08:16:06,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:16:06,656 INFO L85 PathProgramCache]: Analyzing trace with hash -408567639, now seen corresponding path program 1 times [2022-12-14 08:16:06,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:16:06,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359951274] [2022-12-14 08:16:06,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:16:06,658 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:06,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:16:06,661 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:16:06,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-14 08:16:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:16:06,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 08:16:06,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:16:06,769 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 08:16:06,769 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 [2022-12-14 08:16:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:06,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:16:06,790 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:16:06,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359951274] [2022-12-14 08:16:06,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1359951274] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:16:06,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:16:06,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:16:06,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999953799] [2022-12-14 08:16:06,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:16:06,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:16:06,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:16:06,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:16:06,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:16:06,791 INFO L87 Difference]: Start difference. First operand 1671 states and 5829 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:07,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:16:07,004 INFO L93 Difference]: Finished difference Result 1135 states and 3788 transitions. [2022-12-14 08:16:07,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:16:07,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 08:16:07,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:16:07,007 INFO L225 Difference]: With dead ends: 1135 [2022-12-14 08:16:07,007 INFO L226 Difference]: Without dead ends: 1135 [2022-12-14 08:16:07,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:16:07,007 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 82 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:16:07,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 9 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:16:07,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2022-12-14 08:16:07,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 1109. [2022-12-14 08:16:07,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 1076 states have (on average 3.492565055762082) internal successors, (3758), 1108 states have internal predecessors, (3758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:07,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 3758 transitions. [2022-12-14 08:16:07,023 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 3758 transitions. Word has length 9 [2022-12-14 08:16:07,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:16:07,023 INFO L495 AbstractCegarLoop]: Abstraction has 1109 states and 3758 transitions. [2022-12-14 08:16:07,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:07,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 3758 transitions. [2022-12-14 08:16:07,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 08:16:07,024 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:16:07,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:16:07,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-12-14 08:16:07,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:07,225 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 08:16:07,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:16:07,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1242367281, now seen corresponding path program 1 times [2022-12-14 08:16:07,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:16:07,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622396607] [2022-12-14 08:16:07,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:16:07,228 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:07,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:16:07,230 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:16:07,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-14 08:16:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:16:07,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 08:16:07,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:16:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:07,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:16:07,409 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:16:07,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622396607] [2022-12-14 08:16:07,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622396607] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:16:07,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:16:07,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:16:07,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604472243] [2022-12-14 08:16:07,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:16:07,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:16:07,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:16:07,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:16:07,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:16:07,410 INFO L87 Difference]: Start difference. First operand 1109 states and 3758 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:07,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:16:07,734 INFO L93 Difference]: Finished difference Result 1653 states and 5256 transitions. [2022-12-14 08:16:07,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:16:07,735 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 08:16:07,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:16:07,738 INFO L225 Difference]: With dead ends: 1653 [2022-12-14 08:16:07,738 INFO L226 Difference]: Without dead ends: 1653 [2022-12-14 08:16:07,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:16:07,739 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 119 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:16:07,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 48 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:16:07,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2022-12-14 08:16:07,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1436. [2022-12-14 08:16:07,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1403 states have (on average 3.3856022808267996) internal successors, (4750), 1435 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:07,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 4750 transitions. [2022-12-14 08:16:07,758 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 4750 transitions. Word has length 10 [2022-12-14 08:16:07,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:16:07,758 INFO L495 AbstractCegarLoop]: Abstraction has 1436 states and 4750 transitions. [2022-12-14 08:16:07,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:07,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 4750 transitions. [2022-12-14 08:16:07,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 08:16:07,759 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:16:07,759 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:16:07,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 08:16:07,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:07,960 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 08:16:07,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:16:07,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1059331769, now seen corresponding path program 1 times [2022-12-14 08:16:07,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:16:07,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1385703053] [2022-12-14 08:16:07,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:16:07,963 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:07,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:16:07,966 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:16:07,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-14 08:16:08,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:16:08,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 08:16:08,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:16:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:08,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:16:08,208 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:16:08,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1385703053] [2022-12-14 08:16:08,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1385703053] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:16:08,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:16:08,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:16:08,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953199808] [2022-12-14 08:16:08,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:16:08,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:16:08,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:16:08,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:16:08,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:16:08,210 INFO L87 Difference]: Start difference. First operand 1436 states and 4750 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:08,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:16:08,546 INFO L93 Difference]: Finished difference Result 1539 states and 4831 transitions. [2022-12-14 08:16:08,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:16:08,547 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 08:16:08,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:16:08,549 INFO L225 Difference]: With dead ends: 1539 [2022-12-14 08:16:08,550 INFO L226 Difference]: Without dead ends: 1539 [2022-12-14 08:16:08,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:16:08,550 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 107 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:16:08,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 67 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:16:08,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1539 states. [2022-12-14 08:16:08,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1539 to 1501. [2022-12-14 08:16:08,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1501 states, 1468 states have (on average 3.2568119891008176) internal successors, (4781), 1500 states have internal predecessors, (4781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:08,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1501 states to 1501 states and 4781 transitions. [2022-12-14 08:16:08,568 INFO L78 Accepts]: Start accepts. Automaton has 1501 states and 4781 transitions. Word has length 10 [2022-12-14 08:16:08,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:16:08,568 INFO L495 AbstractCegarLoop]: Abstraction has 1501 states and 4781 transitions. [2022-12-14 08:16:08,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:08,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1501 states and 4781 transitions. [2022-12-14 08:16:08,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 08:16:08,569 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:16:08,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:16:08,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-12-14 08:16:08,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:08,770 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 08:16:08,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:16:08,771 INFO L85 PathProgramCache]: Analyzing trace with hash -141317907, now seen corresponding path program 1 times [2022-12-14 08:16:08,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:16:08,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021905772] [2022-12-14 08:16:08,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:16:08,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:08,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:16:08,776 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:16:08,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-12-14 08:16:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:16:08,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:16:08,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:16:08,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 08:16:08,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:08,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:16:08,878 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:16:08,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021905772] [2022-12-14 08:16:08,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021905772] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:16:08,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:16:08,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:16:08,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128381344] [2022-12-14 08:16:08,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:16:08,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:16:08,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:16:08,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:16:08,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:16:08,879 INFO L87 Difference]: Start difference. First operand 1501 states and 4781 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:09,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:16:09,059 INFO L93 Difference]: Finished difference Result 1369 states and 4361 transitions. [2022-12-14 08:16:09,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:16:09,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 08:16:09,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:16:09,062 INFO L225 Difference]: With dead ends: 1369 [2022-12-14 08:16:09,063 INFO L226 Difference]: Without dead ends: 1369 [2022-12-14 08:16:09,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:16:09,063 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:16:09,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 11 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:16:09,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2022-12-14 08:16:09,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1369. [2022-12-14 08:16:09,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1344 states have (on average 3.2447916666666665) internal successors, (4361), 1368 states have internal predecessors, (4361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 4361 transitions. [2022-12-14 08:16:09,080 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 4361 transitions. Word has length 11 [2022-12-14 08:16:09,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:16:09,080 INFO L495 AbstractCegarLoop]: Abstraction has 1369 states and 4361 transitions. [2022-12-14 08:16:09,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:09,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 4361 transitions. [2022-12-14 08:16:09,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 08:16:09,081 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:16:09,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:16:09,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-12-14 08:16:09,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:09,283 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 08:16:09,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:16:09,283 INFO L85 PathProgramCache]: Analyzing trace with hash -141317906, now seen corresponding path program 1 times [2022-12-14 08:16:09,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:16:09,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602216775] [2022-12-14 08:16:09,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:16:09,285 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:09,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:16:09,288 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:16:09,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-14 08:16:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:16:09,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 08:16:09,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:16:09,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 08:16:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:09,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:16:09,393 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:16:09,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602216775] [2022-12-14 08:16:09,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602216775] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:16:09,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:16:09,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:16:09,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949359386] [2022-12-14 08:16:09,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:16:09,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:16:09,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:16:09,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:16:09,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:16:09,394 INFO L87 Difference]: Start difference. First operand 1369 states and 4361 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:09,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:16:09,558 INFO L93 Difference]: Finished difference Result 1237 states and 3941 transitions. [2022-12-14 08:16:09,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:16:09,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 08:16:09,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:16:09,560 INFO L225 Difference]: With dead ends: 1237 [2022-12-14 08:16:09,560 INFO L226 Difference]: Without dead ends: 1237 [2022-12-14 08:16:09,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:16:09,561 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:16:09,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 12 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:16:09,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2022-12-14 08:16:09,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1237. [2022-12-14 08:16:09,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1220 states have (on average 3.230327868852459) internal successors, (3941), 1236 states have internal predecessors, (3941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:09,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 3941 transitions. [2022-12-14 08:16:09,576 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 3941 transitions. Word has length 11 [2022-12-14 08:16:09,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:16:09,577 INFO L495 AbstractCegarLoop]: Abstraction has 1237 states and 3941 transitions. [2022-12-14 08:16:09,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:09,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 3941 transitions. [2022-12-14 08:16:09,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 08:16:09,577 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:16:09,577 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:16:09,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-14 08:16:09,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:09,779 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 08:16:09,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:16:09,780 INFO L85 PathProgramCache]: Analyzing trace with hash 549765137, now seen corresponding path program 1 times [2022-12-14 08:16:09,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:16:09,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289263514] [2022-12-14 08:16:09,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:16:09,781 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:09,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:16:09,784 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:16:09,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-14 08:16:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:16:09,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 08:16:09,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:16:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:09,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:16:10,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:10,083 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:16:10,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289263514] [2022-12-14 08:16:10,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [289263514] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:16:10,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2018089395] [2022-12-14 08:16:10,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:16:10,084 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:16:10,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:16:10,084 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:16:10,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-12-14 08:16:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:16:10,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 08:16:10,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:16:10,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:10,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:16:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:10,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2018089395] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:16:10,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376563637] [2022-12-14 08:16:10,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:16:10,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:16:10,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:16:10,348 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:16:10,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 08:16:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:16:10,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 08:16:10,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:16:10,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:10,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:16:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:10,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376563637] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:16:10,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:16:10,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-12-14 08:16:10,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225865532] [2022-12-14 08:16:10,518 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:16:10,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 08:16:10,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:16:10,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 08:16:10,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-12-14 08:16:10,519 INFO L87 Difference]: Start difference. First operand 1237 states and 3941 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:11,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:16:11,329 INFO L93 Difference]: Finished difference Result 1715 states and 5041 transitions. [2022-12-14 08:16:11,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 08:16:11,330 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 08:16:11,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:16:11,333 INFO L225 Difference]: With dead ends: 1715 [2022-12-14 08:16:11,333 INFO L226 Difference]: Without dead ends: 1715 [2022-12-14 08:16:11,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-12-14 08:16:11,333 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 338 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 08:16:11,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 146 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 08:16:11,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2022-12-14 08:16:11,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1338. [2022-12-14 08:16:11,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1321 states have (on average 3.1082513247539745) internal successors, (4106), 1337 states have internal predecessors, (4106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:11,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4106 transitions. [2022-12-14 08:16:11,352 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4106 transitions. Word has length 11 [2022-12-14 08:16:11,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:16:11,352 INFO L495 AbstractCegarLoop]: Abstraction has 1338 states and 4106 transitions. [2022-12-14 08:16:11,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:11,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4106 transitions. [2022-12-14 08:16:11,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 08:16:11,352 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:16:11,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:16:11,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 08:16:11,560 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-12-14 08:16:11,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 08:16:11,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:11,955 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 08:16:11,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:16:11,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1751933913, now seen corresponding path program 1 times [2022-12-14 08:16:11,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:16:11,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314499278] [2022-12-14 08:16:11,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:16:11,958 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:11,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:16:11,959 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:16:11,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-14 08:16:12,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:16:12,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 08:16:12,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:16:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:12,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:16:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:12,268 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:16:12,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314499278] [2022-12-14 08:16:12,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1314499278] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:16:12,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [380083810] [2022-12-14 08:16:12,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:16:12,269 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:16:12,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:16:12,270 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:16:12,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-12-14 08:16:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:16:12,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 08:16:12,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:16:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:12,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:16:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:12,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [380083810] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:16:12,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314705595] [2022-12-14 08:16:12,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:16:12,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:16:12,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:16:12,484 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:16:12,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 08:16:12,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:16:12,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 08:16:12,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:16:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:12,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:16:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:12,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314705595] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:16:12,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:16:12,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-12-14 08:16:12,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248463002] [2022-12-14 08:16:12,643 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:16:12,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 08:16:12,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:16:12,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 08:16:12,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-12-14 08:16:12,644 INFO L87 Difference]: Start difference. First operand 1338 states and 4106 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:13,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:16:13,584 INFO L93 Difference]: Finished difference Result 1617 states and 4680 transitions. [2022-12-14 08:16:13,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 08:16:13,584 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 08:16:13,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:16:13,587 INFO L225 Difference]: With dead ends: 1617 [2022-12-14 08:16:13,587 INFO L226 Difference]: Without dead ends: 1617 [2022-12-14 08:16:13,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-12-14 08:16:13,588 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 339 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 08:16:13,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 204 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 08:16:13,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2022-12-14 08:16:13,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1215. [2022-12-14 08:16:13,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1198 states have (on average 3.1118530884808013) internal successors, (3728), 1214 states have internal predecessors, (3728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:13,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 3728 transitions. [2022-12-14 08:16:13,604 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 3728 transitions. Word has length 11 [2022-12-14 08:16:13,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:16:13,604 INFO L495 AbstractCegarLoop]: Abstraction has 1215 states and 3728 transitions. [2022-12-14 08:16:13,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:13,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 3728 transitions. [2022-12-14 08:16:13,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 08:16:13,605 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:16:13,605 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:16:13,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-12-14 08:16:13,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-14 08:16:14,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2022-12-14 08:16:14,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 08:16:14,207 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 08:16:14,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:16:14,208 INFO L85 PathProgramCache]: Analyzing trace with hash 553935153, now seen corresponding path program 2 times [2022-12-14 08:16:14,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:16:14,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055265457] [2022-12-14 08:16:14,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:16:14,208 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:14,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:16:14,210 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:16:14,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-14 08:16:14,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 08:16:14,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:16:14,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 08:16:14,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:16:14,381 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-12-14 08:16:14,381 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 16 treesize of output 31 [2022-12-14 08:16:14,430 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 08:16:14,430 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 [2022-12-14 08:16:14,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:14,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 08:16:14,602 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 08:16:14,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 08:16:14,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:14,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 08:16:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:16:14,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:16:14,837 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:16:14,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055265457] [2022-12-14 08:16:14,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055265457] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:16:14,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:16:14,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:16:14,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317299433] [2022-12-14 08:16:14,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:16:14,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 08:16:14,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:16:14,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 08:16:14,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 08:16:14,838 INFO L87 Difference]: Start difference. First operand 1215 states and 3728 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:16,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:16:16,256 INFO L93 Difference]: Finished difference Result 1640 states and 4934 transitions. [2022-12-14 08:16:16,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 08:16:16,256 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 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 12 [2022-12-14 08:16:16,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:16:16,259 INFO L225 Difference]: With dead ends: 1640 [2022-12-14 08:16:16,259 INFO L226 Difference]: Without dead ends: 1640 [2022-12-14 08:16:16,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-12-14 08:16:16,260 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 282 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:16:16,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 16 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 08:16:16,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2022-12-14 08:16:16,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1287. [2022-12-14 08:16:16,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1270 states have (on average 3.209448818897638) internal successors, (4076), 1286 states have internal predecessors, (4076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:16,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 4076 transitions. [2022-12-14 08:16:16,277 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 4076 transitions. Word has length 12 [2022-12-14 08:16:16,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:16:16,277 INFO L495 AbstractCegarLoop]: Abstraction has 1287 states and 4076 transitions. [2022-12-14 08:16:16,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:16,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 4076 transitions. [2022-12-14 08:16:16,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 08:16:16,278 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:16:16,278 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:16:16,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2022-12-14 08:16:16,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:16,479 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 08:16:16,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:16:16,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1747763897, now seen corresponding path program 2 times [2022-12-14 08:16:16,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:16:16,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1559276617] [2022-12-14 08:16:16,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:16:16,481 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:16,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:16:16,484 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:16:16,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-12-14 08:16:16,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 08:16:16,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:16:16,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 08:16:16,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:16:16,720 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-12-14 08:16:16,721 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 16 treesize of output 31 [2022-12-14 08:16:16,762 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 08:16:16,762 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 [2022-12-14 08:16:16,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:16,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 08:16:16,869 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 08:16:16,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 08:16:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:16:16,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:16:16,943 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:16:16,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1559276617] [2022-12-14 08:16:16,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1559276617] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:16:16,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:16:16,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:16:16,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493524039] [2022-12-14 08:16:16,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:16:16,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:16:16,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:16:16,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:16:16,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 08:16:16,945 INFO L87 Difference]: Start difference. First operand 1287 states and 4076 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:17,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:16:17,748 INFO L93 Difference]: Finished difference Result 1624 states and 5213 transitions. [2022-12-14 08:16:17,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 08:16:17,748 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 08:16:17,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:16:17,751 INFO L225 Difference]: With dead ends: 1624 [2022-12-14 08:16:17,751 INFO L226 Difference]: Without dead ends: 1624 [2022-12-14 08:16:17,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-14 08:16:17,752 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 169 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 08:16:17,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 18 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 08:16:17,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2022-12-14 08:16:17,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1442. [2022-12-14 08:16:17,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1425 states have (on average 3.3592982456140352) internal successors, (4787), 1441 states have internal predecessors, (4787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:17,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 4787 transitions. [2022-12-14 08:16:17,772 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 4787 transitions. Word has length 12 [2022-12-14 08:16:17,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:16:17,772 INFO L495 AbstractCegarLoop]: Abstraction has 1442 states and 4787 transitions. [2022-12-14 08:16:17,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:17,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 4787 transitions. [2022-12-14 08:16:17,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 08:16:17,772 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:16:17,772 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:16:17,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-12-14 08:16:17,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:17,974 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 08:16:17,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:16:17,975 INFO L85 PathProgramCache]: Analyzing trace with hash -469124251, now seen corresponding path program 1 times [2022-12-14 08:16:17,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:16:17,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1850112227] [2022-12-14 08:16:17,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:16:17,976 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:17,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:16:17,979 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:16:17,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-12-14 08:16:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:16:18,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 08:16:18,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:16:18,132 INFO L321 Elim1Store]: treesize reduction 41, result has 34.9 percent of original size [2022-12-14 08:16:18,132 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 16 treesize of output 31 [2022-12-14 08:16:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:16:18,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:16:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 08:16:18,795 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:16:18,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1850112227] [2022-12-14 08:16:18,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1850112227] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:16:18,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1675938733] [2022-12-14 08:16:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:16:18,796 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:16:18,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:16:18,797 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:16:18,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-12-14 08:16:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:16:18,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 08:16:18,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:16:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:19,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:16:19,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:19,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1675938733] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:16:19,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404142442] [2022-12-14 08:16:19,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:16:19,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:16:19,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:16:19,677 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:16:19,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 08:16:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:16:19,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 08:16:19,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:16:20,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:20,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:16:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:20,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404142442] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:16:20,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:16:20,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6, 6, 6, 6] total 23 [2022-12-14 08:16:20,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276549409] [2022-12-14 08:16:20,071 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:16:20,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 08:16:20,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:16:20,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 08:16:20,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-12-14 08:16:20,072 INFO L87 Difference]: Start difference. First operand 1442 states and 4787 transitions. Second operand has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:31,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:16:31,351 INFO L93 Difference]: Finished difference Result 3212 states and 9781 transitions. [2022-12-14 08:16:31,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-14 08:16:31,352 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 08:16:31,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:16:31,357 INFO L225 Difference]: With dead ends: 3212 [2022-12-14 08:16:31,357 INFO L226 Difference]: Without dead ends: 3212 [2022-12-14 08:16:31,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=788, Invalid=2994, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 08:16:31,359 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 1565 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 2394 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1565 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 2445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:16:31,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1565 Valid, 578 Invalid, 2445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2394 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-12-14 08:16:31,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3212 states. [2022-12-14 08:16:31,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3212 to 2190. [2022-12-14 08:16:31,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2173 states have (on average 3.373216751035435) internal successors, (7330), 2189 states have internal predecessors, (7330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:31,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7330 transitions. [2022-12-14 08:16:31,393 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7330 transitions. Word has length 12 [2022-12-14 08:16:31,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:16:31,393 INFO L495 AbstractCegarLoop]: Abstraction has 2190 states and 7330 transitions. [2022-12-14 08:16:31,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:31,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7330 transitions. [2022-12-14 08:16:31,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 08:16:31,394 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:16:31,394 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 08:16:31,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-14 08:16:31,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-12-14 08:16:31,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-12-14 08:16:31,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:31,997 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 08:16:31,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:16:31,998 INFO L85 PathProgramCache]: Analyzing trace with hash 433805592, now seen corresponding path program 3 times [2022-12-14 08:16:31,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:16:31,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940617369] [2022-12-14 08:16:31,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:16:32,000 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:16:32,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:16:32,002 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:16:32,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 08:16:32,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 08:16:32,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:16:32,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 08:16:32,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:16:32,238 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:16:32,239 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 [2022-12-14 08:16:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:32,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:16:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:35,091 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:16:35,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940617369] [2022-12-14 08:16:35,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940617369] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:16:35,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2061361971] [2022-12-14 08:16:35,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:16:35,092 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:16:35,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:16:35,092 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:16:35,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-12-14 08:16:35,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 08:16:35,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:16:35,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 08:16:35,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:16:35,687 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:16:35,687 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 [2022-12-14 08:16:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:35,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:16:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:38,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2061361971] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:16:38,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236558660] [2022-12-14 08:16:38,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:16:38,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:16:38,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:16:38,765 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:16:38,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 08:16:40,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 08:16:40,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:16:40,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 08:16:40,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:16:40,266 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:16:40,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 08:16:40,374 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:40,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:16:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:16:40,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236558660] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:16:40,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:16:40,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 32 [2022-12-14 08:16:40,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119468802] [2022-12-14 08:16:40,698 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:16:40,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 08:16:40,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:16:40,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 08:16:40,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 08:16:40,700 INFO L87 Difference]: Start difference. First operand 2190 states and 7330 transitions. Second operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:03,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:17:03,729 INFO L93 Difference]: Finished difference Result 2621 states and 8477 transitions. [2022-12-14 08:17:03,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 08:17:03,731 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 08:17:03,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:17:03,736 INFO L225 Difference]: With dead ends: 2621 [2022-12-14 08:17:03,736 INFO L226 Difference]: Without dead ends: 2621 [2022-12-14 08:17:03,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=678, Invalid=1392, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 08:17:03,737 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1779 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 2177 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1779 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 2389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 2177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:17:03,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1779 Valid, 221 Invalid, 2389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 2177 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2022-12-14 08:17:03,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2022-12-14 08:17:03,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 2202. [2022-12-14 08:17:03,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2185 states have (on average 3.365675057208238) internal successors, (7354), 2201 states have internal predecessors, (7354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:03,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 7354 transitions. [2022-12-14 08:17:03,768 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 7354 transitions. Word has length 12 [2022-12-14 08:17:03,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:17:03,768 INFO L495 AbstractCegarLoop]: Abstraction has 2202 states and 7354 transitions. [2022-12-14 08:17:03,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:03,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 7354 transitions. [2022-12-14 08:17:03,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 08:17:03,769 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:17:03,769 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:17:03,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-12-14 08:17:03,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 08:17:04,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-14 08:17:04,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:17:04,371 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 08:17:04,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:17:04,372 INFO L85 PathProgramCache]: Analyzing trace with hash -244237268, now seen corresponding path program 1 times [2022-12-14 08:17:04,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:17:04,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1441410249] [2022-12-14 08:17:04,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:17:04,374 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:04,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:17:04,377 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:17:04,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-12-14 08:17:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:17:04,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 08:17:04,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:04,559 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:17:04,559 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 [2022-12-14 08:17:04,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 08:17:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:04,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:17:05,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:05,064 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:17:05,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1441410249] [2022-12-14 08:17:05,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1441410249] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:17:05,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1786289893] [2022-12-14 08:17:05,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:17:05,065 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:17:05,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:17:05,066 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:17:05,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-12-14 08:17:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:17:05,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 08:17:05,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:05,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:17:05,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:05,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1786289893] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:17:05,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305791063] [2022-12-14 08:17:05,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:17:05,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:17:05,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:17:05,652 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:17:05,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 08:17:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:17:05,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 08:17:05,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:05,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:05,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:17:05,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:05,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305791063] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:17:05,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:17:05,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 19 [2022-12-14 08:17:05,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227969346] [2022-12-14 08:17:05,993 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:17:05,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 08:17:05,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:17:05,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 08:17:05,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2022-12-14 08:17:05,994 INFO L87 Difference]: Start difference. First operand 2202 states and 7354 transitions. Second operand has 21 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:09,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:17:09,140 INFO L93 Difference]: Finished difference Result 2552 states and 7719 transitions. [2022-12-14 08:17:09,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 08:17:09,141 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 08:17:09,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:17:09,145 INFO L225 Difference]: With dead ends: 2552 [2022-12-14 08:17:09,145 INFO L226 Difference]: Without dead ends: 2552 [2022-12-14 08:17:09,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=272, Invalid=918, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 08:17:09,145 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 613 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 1560 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:17:09,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 448 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1560 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 08:17:09,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2022-12-14 08:17:09,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2000. [2022-12-14 08:17:09,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1983 states have (on average 3.2400403429147757) internal successors, (6425), 1999 states have internal predecessors, (6425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:09,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 6425 transitions. [2022-12-14 08:17:09,173 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 6425 transitions. Word has length 14 [2022-12-14 08:17:09,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:17:09,173 INFO L495 AbstractCegarLoop]: Abstraction has 2000 states and 6425 transitions. [2022-12-14 08:17:09,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 20 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:17:09,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 6425 transitions. [2022-12-14 08:17:09,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 08:17:09,173 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:17:09,174 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:17:09,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-14 08:17:09,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -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)] Ended with exit code 0 [2022-12-14 08:17:09,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-12-14 08:17:09,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 08:17:09,776 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 08:17:09,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:17:09,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1945536889, now seen corresponding path program 1 times [2022-12-14 08:17:09,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:17:09,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1819001699] [2022-12-14 08:17:09,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:17:09,779 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:17:09,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:17:09,781 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:17:09,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -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 [2022-12-14 08:17:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:17:09,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 08:17:09,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:10,022 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:17:10,023 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 [2022-12-14 08:17:10,069 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 08:17:10,069 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 [2022-12-14 08:17:10,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:17:10,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-12-14 08:17:10,491 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 08:17:10,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 08:17:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:10,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:17:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:14,141 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:17:14,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1819001699] [2022-12-14 08:17:14,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1819001699] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:17:14,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [532691853] [2022-12-14 08:17:14,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:17:14,142 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:17:14,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:17:14,143 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:17:14,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-12-14 08:17:14,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:17:14,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 08:17:14,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:14,481 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:17:14,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2022-12-14 08:17:15,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:17:15,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 08:17:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:15,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:17:17,357 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvmul (_ bv4 32) c_~i_7~0))) (let ((.cse1 (bvadd .cse0 (_ bv8 32) c_~X_0~0.offset))) (and (or (bvule (bvadd .cse0 (_ bv4 32) c_~X_0~0.offset) .cse1) (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_110| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t2~0.base_110|)) (forall ((v_ArrVal_1117 (_ BitVec 32))) (bvule .cse1 (select (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_110| v_ArrVal_1117) c_~X_0~0.base)))))))) is different from false [2022-12-14 08:17:31,120 WARN L233 SmtUtils]: Spent 6.09s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:17:33,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:33,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [532691853] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:17:33,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007422265] [2022-12-14 08:17:33,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:17:33,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:17:33,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:17:33,557 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:17:33,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 08:17:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:17:33,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 08:17:33,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:33,735 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:17:33,735 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 [2022-12-14 08:17:34,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:17:34,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-12-14 08:17:34,092 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 08:17:34,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 08:17:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:34,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:17:37,219 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:17:37,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 65 [2022-12-14 08:17:37,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:17:37,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007422265] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:17:37,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:17:37,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 36 [2022-12-14 08:17:37,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993282265] [2022-12-14 08:17:37,858 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:17:37,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-14 08:17:37,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:17:37,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-14 08:17:37,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1198, Unknown=2, NotChecked=70, Total=1406 [2022-12-14 08:17:37,859 INFO L87 Difference]: Start difference. First operand 2000 states and 6425 transitions. Second operand has 38 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:18:00,856 WARN L233 SmtUtils]: Spent 22.51s on a formula simplification. DAG size of input: 78 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:18:17,529 WARN L233 SmtUtils]: Spent 16.33s on a formula simplification. DAG size of input: 72 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:18:41,332 WARN L233 SmtUtils]: Spent 22.52s on a formula simplification. DAG size of input: 83 DAG size of output: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:19:21,762 WARN L233 SmtUtils]: Spent 37.22s on a formula simplification. DAG size of input: 100 DAG size of output: 94 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:19:39,748 WARN L233 SmtUtils]: Spent 17.42s on a formula simplification. DAG size of input: 69 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:19:51,448 WARN L233 SmtUtils]: Spent 10.72s on a formula simplification. DAG size of input: 59 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:20:07,423 WARN L233 SmtUtils]: Spent 14.28s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:20:10,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 08:20:39,877 WARN L233 SmtUtils]: Spent 28.45s on a formula simplification. DAG size of input: 66 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:20:43,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:20:45,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:22:11,104 WARN L233 SmtUtils]: Spent 1.41m on a formula simplification. DAG size of input: 115 DAG size of output: 109 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:22:14,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:22:16,427 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse21 (bvmul (_ bv4 32) c_~i_7~0)) (.cse17 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv12 32)))) (let ((.cse0 (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_108| (_ BitVec 32))) (not (= (_ bv0 1) (select |c_#valid| |v_thread1Thread1of1ForFork1_~#t2~0.base_108|))))) (.cse16 (bvule (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv8 32)) .cse17)) (.cse2 (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (.cse18 (bvslt |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (.cse5 (bvslt (bvadd (_ bv2 32) |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (.cse9 (bvadd c_~X_0~0.offset (_ bv12 32))) (.cse7 (bvslt (bvadd |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| (_ bv1 32)) |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (.cse19 (bvmul (_ bv4 32) |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|)) (.cse20 (select |c_#length| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse8 (bvadd .cse21 (_ bv8 32) c_~X_0~0.offset))) (let ((.cse1 (bvule (bvadd .cse21 (_ bv4 32) c_~X_0~0.offset) .cse8)) (.cse4 (not (bvule (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv4 32) .cse19) .cse20))) (.cse13 (not .cse7)) (.cse12 (bvule (bvadd (_ bv8 32) c_~X_0~0.offset) .cse9)) (.cse14 (not .cse5)) (.cse11 (not .cse18)) (.cse10 (and (or .cse16 .cse2) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_110| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t2~0.base_110|)) (forall ((v_ArrVal_1117 (_ BitVec 32))) (bvule .cse17 (select (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_110| v_ArrVal_1117) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))))))) (.cse3 (and (or .cse0 .cse16) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_108| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_thread1Thread1of1ForFork1_~#t2~0.base_108|))) (forall ((v_ArrVal_1077 (_ BitVec 32))) (bvule .cse17 (select (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_108| v_ArrVal_1077) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))))))) (.cse6 (not (bvule (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv8 32) .cse19) .cse20))) (.cse15 (bvslt (bvadd (_ bv3 32) |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|))) (and (or .cse0 .cse1) (or .cse1 .cse2) (or .cse3 .cse4 .cse5 .cse6) (or .cse3 .cse4 .cse7) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_110| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t2~0.base_110|)) (forall ((v_ArrVal_1117 (_ BitVec 32))) (bvule .cse8 (select (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_110| v_ArrVal_1117) c_~X_0~0.base))))) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_108| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_thread1Thread1of1ForFork1_~#t2~0.base_108|))) (forall ((v_ArrVal_1077 (_ BitVec 32))) (bvule .cse9 (select (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_108| v_ArrVal_1077) c_~X_0~0.base))))) (or .cse10 .cse11 .cse7) (or .cse12 .cse2) (or .cse3 .cse5 .cse13 .cse11) (or .cse3 .cse11 .cse7) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_110| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t2~0.base_110|)) (forall ((v_ArrVal_1117 (_ BitVec 32))) (bvule .cse9 (select (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_110| v_ArrVal_1117) c_~X_0~0.base))))) (or .cse10 .cse5 .cse13 .cse11) (or .cse14 .cse10 .cse11 .cse15) (or .cse12 .cse0) (or .cse14 (and .cse16 (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_108| (_ BitVec 32)) (v_ArrVal_1077 (_ BitVec 32))) (or (= |v_thread1Thread1of1ForFork1_~#t2~0.base_108| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (bvule .cse17 (select (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_108| v_ArrVal_1077) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))))) .cse11 .cse15) (or .cse3 .cse18) (or .cse10 .cse18) (or .cse3 .cse6 (not (bvule (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse19 (_ bv12 32)) .cse20)) .cse15) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_108| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_thread1Thread1of1ForFork1_~#t2~0.base_108|))) (forall ((v_ArrVal_1077 (_ BitVec 32))) (bvule .cse8 (select (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_108| v_ArrVal_1077) c_~X_0~0.base))))))))) is different from false [2022-12-14 08:22:18,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:22:20,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:22:24,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:22:26,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 08:22:30,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:22:34,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:22:37,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:22:40,198 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:22:42,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:22:45,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 08:22:47,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:22:49,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:22:51,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:22:53,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:22:56,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:22:58,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:23:00,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:23:03,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:23:05,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:23:07,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:23:10,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:23:13,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:23:38,738 WARN L233 SmtUtils]: Spent 23.70s on a formula simplification. DAG size of input: 65 DAG size of output: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:23:41,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:23:43,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:23:54,315 WARN L233 SmtUtils]: Spent 8.94s on a formula simplification. DAG size of input: 53 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:24:35,184 WARN L233 SmtUtils]: Spent 38.74s on a formula simplification. DAG size of input: 76 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:24:38,191 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse11 (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv12 32)))) (let ((.cse10 (bvule (bvadd |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| (_ bv8 32)) .cse11)) (.cse2 (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (.cse12 (bvslt |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (.cse7 (bvslt (bvadd (_ bv2 32) |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (.cse0 (bvmul (_ bv4 32) c_~i_7~0))) (let ((.cse1 (bvadd .cse0 (_ bv8 32) c_~X_0~0.offset)) (.cse6 (bvadd c_~X_0~0.offset (_ bv12 32))) (.cse5 (bvslt (bvadd |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| (_ bv1 32)) |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (.cse8 (not .cse7)) (.cse4 (not .cse12)) (.cse9 (bvslt (bvadd (_ bv3 32) |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (.cse3 (and (or .cse10 .cse2) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_110| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t2~0.base_110|)) (forall ((v_ArrVal_1117 (_ BitVec 32))) (bvule .cse11 (select (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_110| v_ArrVal_1117) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)))))))) (and (or (bvule (bvadd .cse0 (_ bv4 32) c_~X_0~0.offset) .cse1) .cse2) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_110| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t2~0.base_110|)) (forall ((v_ArrVal_1117 (_ BitVec 32))) (bvule .cse1 (select (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_110| v_ArrVal_1117) c_~X_0~0.base))))) (or .cse3 .cse4 .cse5) (or (bvule (bvadd (_ bv8 32) c_~X_0~0.offset) .cse6) .cse2) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_110| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t2~0.base_110|)) (forall ((v_ArrVal_1117 (_ BitVec 32))) (bvule .cse6 (select (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_110| v_ArrVal_1117) c_~X_0~0.base))))) (or .cse3 .cse7 (not .cse5) .cse4) (or .cse8 .cse3 .cse4 .cse9) (or .cse8 (and .cse10 (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_108| (_ BitVec 32)) (v_ArrVal_1077 (_ BitVec 32))) (or (= |v_thread1Thread1of1ForFork1_~#t2~0.base_108| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (bvule .cse11 (select (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_108| v_ArrVal_1077) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))))) .cse4 .cse9) (or .cse3 .cse12))))) is different from false [2022-12-14 08:24:42,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:24:44,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 08:24:59,853 WARN L233 SmtUtils]: Spent 15.03s on a formula simplification. DAG size of input: 54 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:24:59,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:24:59,939 INFO L93 Difference]: Finished difference Result 6008 states and 19762 transitions. [2022-12-14 08:24:59,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 08:24:59,941 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 08:24:59,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:24:59,951 INFO L225 Difference]: With dead ends: 6008 [2022-12-14 08:24:59,952 INFO L226 Difference]: Without dead ends: 6008 [2022-12-14 08:24:59,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 382.0s TimeCoverageRelationStatistics Valid=649, Invalid=3649, Unknown=4, NotChecked=390, Total=4692 [2022-12-14 08:24:59,953 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 3217 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 4580 mSolverCounterSat, 196 mSolverCounterUnsat, 29 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3217 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 5184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 4580 IncrementalHoareTripleChecker+Invalid, 29 IncrementalHoareTripleChecker+Unknown, 379 IncrementalHoareTripleChecker+Unchecked, 85.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:24:59,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3217 Valid, 595 Invalid, 5184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 4580 Invalid, 29 Unknown, 379 Unchecked, 85.3s Time] [2022-12-14 08:24:59,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6008 states. [2022-12-14 08:24:59,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6008 to 2655. [2022-12-14 08:25:00,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2655 states, 2638 states have (on average 3.3161485974222895) internal successors, (8748), 2654 states have internal predecessors, (8748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:25:00,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2655 states to 2655 states and 8748 transitions. [2022-12-14 08:25:00,006 INFO L78 Accepts]: Start accepts. Automaton has 2655 states and 8748 transitions. Word has length 14 [2022-12-14 08:25:00,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:25:00,006 INFO L495 AbstractCegarLoop]: Abstraction has 2655 states and 8748 transitions. [2022-12-14 08:25:00,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 37 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:25:00,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2655 states and 8748 transitions. [2022-12-14 08:25:00,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 08:25:00,007 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:25:00,007 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:25:00,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-12-14 08:25:00,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-12-14 08:25:00,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-14 08:25:00,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:25:00,610 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 43 more)] === [2022-12-14 08:25:00,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:25:00,611 INFO L85 PathProgramCache]: Analyzing trace with hash -569342196, now seen corresponding path program 2 times [2022-12-14 08:25:00,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 08:25:00,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889515598] [2022-12-14 08:25:00,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:25:00,613 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 08:25:00,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 08:25:00,614 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 08:25:00,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-12-14 08:25:00,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:25:00,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:25:00,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 08:25:00,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:25:00,838 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-12-14 08:25:00,838 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 27 [2022-12-14 08:25:00,893 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2022-12-14 08:25:00,893 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 12 treesize of output 33 [2022-12-14 08:25:01,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:01,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 08:25:01,018 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 08:25:01,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 08:25:01,054 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 08:25:01,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-12-14 08:25:01,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:25:01,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:25:09,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:25:09,694 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 08:25:09,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889515598] [2022-12-14 08:25:09,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889515598] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:25:09,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1588009129] [2022-12-14 08:25:09,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:25:09,694 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 08:25:09,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 08:25:09,695 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 08:25:09,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-12-14 08:25:10,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:25:10,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:25:10,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 08:25:10,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:25:10,069 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:25:10,069 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 [2022-12-14 08:25:10,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:10,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 08:25:10,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:10,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 08:25:11,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:25:11,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:25:16,245 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd c_~X_0~0.offset (_ bv12 32)))) (and (or (bvule (bvadd (_ bv8 32) c_~X_0~0.offset) .cse0) (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (forall ((|v_thread1Thread1of1ForFork1_~#t2~0.base_116| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t2~0.base_116|)) (forall ((v_ArrVal_1245 (_ BitVec 32)) (|v_thread1Thread1of1ForFork1_~#t3~0.base_112| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_thread1Thread1of1ForFork1_~#t3~0.base_112|)) (forall ((v_ArrVal_1246 (_ BitVec 32))) (bvule .cse0 (select (store (store |c_#length| |v_thread1Thread1of1ForFork1_~#t2~0.base_116| v_ArrVal_1245) |v_thread1Thread1of1ForFork1_~#t3~0.base_112| v_ArrVal_1246) c_~X_0~0.base))))))))) is different from false [2022-12-14 08:25:24,567 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:25:35,558 WARN L233 SmtUtils]: Spent 8.10s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:25:38,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:25:38,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1588009129] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:25:38,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512915077] [2022-12-14 08:25:38,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 08:25:38,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:25:38,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:25:38,231 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:25:38,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d83b86fb-f53b-4e2d-a8df-6d9ffff18b9d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-14 08:25:38,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 08:25:38,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:25:38,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 08:25:38,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:25:38,436 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-12-14 08:25:38,436 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 [2022-12-14 08:25:39,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:39,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 08:25:39,155 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 08:25:39,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 08:25:39,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:25:39,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 08:25:39,377 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-12-14 08:25:39,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-12-14 08:25:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:25:39,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:25:57,925 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:25:57,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 180 [2022-12-14 08:26:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:26:11,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512915077] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:26:11,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 08:26:11,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 50 [2022-12-14 08:26:11,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721365125] [2022-12-14 08:26:11,650 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 08:26:11,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-12-14 08:26:11,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 08:26:11,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-12-14 08:26:11,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2289, Unknown=12, NotChecked=98, Total=2652 [2022-12-14 08:26:11,651 INFO L87 Difference]: Start difference. First operand 2655 states and 8748 transitions. Second operand has 52 states, 51 states have (on average 1.588235294117647) internal successors, (81), 51 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:26:30,863 WARN L233 SmtUtils]: Spent 18.42s on a formula simplification. DAG size of input: 159 DAG size of output: 90 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:26:48,724 WARN L233 SmtUtils]: Spent 17.26s on a formula simplification. DAG size of input: 150 DAG size of output: 89 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:27:15,221 WARN L233 SmtUtils]: Spent 18.57s on a formula simplification. DAG size of input: 170 DAG size of output: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:27:16,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 08:27:40,280 WARN L233 SmtUtils]: Spent 17.28s on a formula simplification. DAG size of input: 152 DAG size of output: 91 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:28:12,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 08:28:18,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 08:28:20,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 08:28:21,678 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-14 08:28:39,387 WARN L233 SmtUtils]: Spent 9.07s on a formula simplification. DAG size of input: 116 DAG size of output: 102 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:28:59,331 WARN L233 SmtUtils]: Spent 15.73s on a formula simplification. DAG size of input: 105 DAG size of output: 101 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:29:14,627 WARN L233 SmtUtils]: Spent 11.39s on a formula simplification. DAG size of input: 106 DAG size of output: 99 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:29:37,691 WARN L233 SmtUtils]: Spent 14.40s on a formula simplification. DAG size of input: 122 DAG size of output: 108 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:29:52,370 WARN L233 SmtUtils]: Spent 13.47s on a formula simplification. DAG size of input: 93 DAG size of output: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:30:09,681 WARN L233 SmtUtils]: Spent 13.39s on a formula simplification. DAG size of input: 111 DAG size of output: 107 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 08:30:29,365 WARN L233 SmtUtils]: Spent 11.25s on a formula simplification. DAG size of input: 112 DAG size of output: 105 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)