./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:37:23,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:37:23,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:37:23,688 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:37:23,689 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:37:23,690 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:37:23,692 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:37:23,694 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:37:23,696 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:37:23,697 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:37:23,698 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:37:23,699 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:37:23,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:37:23,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:37:23,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:37:23,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:37:23,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:37:23,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:37:23,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:37:23,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:37:23,712 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:37:23,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:37:23,715 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:37:23,716 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:37:23,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:37:23,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:37:23,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:37:23,722 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:37:23,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:37:23,723 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:37:23,724 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:37:23,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:37:23,726 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:37:23,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:37:23,728 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:37:23,728 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:37:23,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:37:23,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:37:23,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:37:23,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:37:23,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:37:23,734 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-26 00:37:23,783 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:37:23,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:37:23,785 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:37:23,785 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:37:23,786 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:37:23,786 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:37:23,787 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:37:23,787 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:37:23,787 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:37:23,787 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:37:23,788 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:37:23,789 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:37:23,789 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:37:23,789 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:37:23,789 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:37:23,790 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:37:23,790 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:37:23,790 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:37:23,791 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 00:37:23,791 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 00:37:23,791 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:37:23,791 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:37:23,792 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:37:23,792 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:37:23,792 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:37:23,792 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:37:23,792 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 00:37:23,793 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 00:37:23,793 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 00:37:23,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:37:23,793 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:37:23,794 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:37:23,794 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:37:23,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:37:23,795 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:37:23,795 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:37:23,795 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:37:23,795 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:37:23,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:37:23,797 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:37:23,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:37:23,797 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:37:23,797 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_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 [2022-11-26 00:37:24,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:37:24,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:37:24,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:37:24,169 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:37:24,171 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:37:24,172 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2022-11-26 00:37:27,335 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:37:27,560 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:37:27,561 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2022-11-26 00:37:27,571 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/data/e9e6c3e4a/6b499117dcb44621a3aa395ef649d0d2/FLAG0a91ee238 [2022-11-26 00:37:27,587 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/data/e9e6c3e4a/6b499117dcb44621a3aa395ef649d0d2 [2022-11-26 00:37:27,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:37:27,592 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:37:27,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:37:27,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:37:27,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:37:27,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:37:27" (1/1) ... [2022-11-26 00:37:27,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ff18e24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:27, skipping insertion in model container [2022-11-26 00:37:27,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:37:27" (1/1) ... [2022-11-26 00:37:27,610 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:37:27,638 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:37:27,807 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:37:27,812 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:37:27,812 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:37:27,812 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:37:27,816 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:37:27,817 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:37:27,817 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:37:27,818 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:37:27,819 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:37:27,821 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:37:27,821 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:37:27,821 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:37:27,830 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_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-11-26 00:37:27,843 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:37:27,860 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-26 00:37:27,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2e5e1085 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:27, skipping insertion in model container [2022-11-26 00:37:27,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:37:27,862 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-26 00:37:27,864 INFO L158 Benchmark]: Toolchain (without parser) took 270.81ms. Allocated memory is still 117.4MB. Free memory was 76.0MB in the beginning and 65.2MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:37:27,864 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 117.4MB. Free memory is still 71.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:37:27,865 INFO L158 Benchmark]: CACSL2BoogieTranslator took 267.82ms. Allocated memory is still 117.4MB. Free memory was 75.7MB in the beginning and 65.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:37:27,867 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 117.4MB. Free memory is still 71.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 267.82ms. Allocated memory is still 117.4MB. Free memory was 75.7MB in the beginning and 65.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 113]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:37:30,344 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:37:30,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:37:30,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:37:30,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:37:30,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:37:30,399 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:37:30,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:37:30,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:37:30,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:37:30,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:37:30,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:37:30,415 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:37:30,418 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:37:30,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:37:30,427 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:37:30,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:37:30,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:37:30,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:37:30,433 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:37:30,434 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:37:30,438 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:37:30,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:37:30,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:37:30,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:37:30,456 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:37:30,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:37:30,459 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:37:30,460 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:37:30,461 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:37:30,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:37:30,463 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:37:30,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:37:30,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:37:30,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:37:30,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:37:30,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:37:30,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:37:30,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:37:30,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:37:30,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:37:30,476 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-26 00:37:30,552 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:37:30,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:37:30,553 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:37:30,554 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:37:30,555 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:37:30,555 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:37:30,555 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:37:30,556 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:37:30,556 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:37:30,556 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:37:30,558 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:37:30,558 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:37:30,559 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 00:37:30,559 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 00:37:30,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:37:30,560 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:37:30,560 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:37:30,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:37:30,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:37:30,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:37:30,561 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 00:37:30,561 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 00:37:30,562 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 00:37:30,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:37:30,562 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:37:30,562 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-26 00:37:30,563 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-26 00:37:30,563 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:37:30,563 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:37:30,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:37:30,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-26 00:37:30,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:37:30,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:37:30,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:37:30,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:37:30,565 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-26 00:37:30,566 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-26 00:37:30,566 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:37:30,566 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-26 00:37:30,567 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_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 [2022-11-26 00:37:31,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:37:31,079 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:37:31,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:37:31,084 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:37:31,085 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:37:31,087 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2022-11-26 00:37:34,237 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:37:34,522 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:37:34,522 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2022-11-26 00:37:34,533 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/data/a49e51a84/53a5717c89be4c19af48049fc1c87492/FLAGa9371f9ce [2022-11-26 00:37:34,554 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/data/a49e51a84/53a5717c89be4c19af48049fc1c87492 [2022-11-26 00:37:34,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:37:34,558 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:37:34,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:37:34,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:37:34,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:37:34,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:37:34" (1/1) ... [2022-11-26 00:37:34,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@519460ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:34, skipping insertion in model container [2022-11-26 00:37:34,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:37:34" (1/1) ... [2022-11-26 00:37:34,577 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:37:34,605 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:37:34,823 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:37:34,825 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:37:34,826 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:37:34,827 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:37:34,833 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:37:34,834 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:37:34,835 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:37:34,835 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:37:34,839 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:37:34,840 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:37:34,841 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:37:34,848 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:37:34,868 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_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-11-26 00:37:34,893 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:37:34,910 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-26 00:37:34,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:37:34,936 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:37:34,937 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:37:34,937 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:37:34,938 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:37:34,939 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:37:34,940 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:37:34,940 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:37:34,940 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:37:34,942 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:37:34,942 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:37:34,943 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:37:34,943 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:37:34,946 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_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-11-26 00:37:34,951 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:37:34,956 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:37:34,978 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:37:34,979 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:37:34,979 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:37:34,980 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:37:34,981 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:37:34,987 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:37:34,987 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:37:34,987 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:37:34,988 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:37:34,989 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:37:34,990 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:37:34,990 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:37:34,994 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_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-11-26 00:37:35,010 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:37:35,030 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:37:35,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:35 WrapperNode [2022-11-26 00:37:35,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:37:35,032 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:37:35,032 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:37:35,032 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:37:35,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:35" (1/1) ... [2022-11-26 00:37:35,065 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:35" (1/1) ... [2022-11-26 00:37:35,107 INFO L138 Inliner]: procedures = 27, calls = 51, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 194 [2022-11-26 00:37:35,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:37:35,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:37:35,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:37:35,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:37:35,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:35" (1/1) ... [2022-11-26 00:37:35,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:35" (1/1) ... [2022-11-26 00:37:35,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:35" (1/1) ... [2022-11-26 00:37:35,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:35" (1/1) ... [2022-11-26 00:37:35,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:35" (1/1) ... [2022-11-26 00:37:35,153 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:35" (1/1) ... [2022-11-26 00:37:35,171 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:35" (1/1) ... [2022-11-26 00:37:35,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:35" (1/1) ... [2022-11-26 00:37:35,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:37:35,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:37:35,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:37:35,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:37:35,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:35" (1/1) ... [2022-11-26 00:37:35,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:37:35,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:37:35,261 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:37:35,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:37:35,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:37:35,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-26 00:37:35,316 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:37:35,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-26 00:37:35,316 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-26 00:37:35,316 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-26 00:37:35,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-26 00:37:35,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-26 00:37:35,317 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-26 00:37:35,317 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-26 00:37:35,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-26 00:37:35,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-26 00:37:35,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:37:35,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:37:35,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:37:35,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:37:35,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-26 00:37:35,320 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-26 00:37:35,501 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:37:35,503 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:37:36,330 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:37:36,534 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:37:36,534 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-26 00:37:36,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:37:36 BoogieIcfgContainer [2022-11-26 00:37:36,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:37:36,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:37:36,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:37:36,544 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:37:36,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:37:34" (1/3) ... [2022-11-26 00:37:36,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b2a3a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:37:36, skipping insertion in model container [2022-11-26 00:37:36,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:37:35" (2/3) ... [2022-11-26 00:37:36,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b2a3a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:37:36, skipping insertion in model container [2022-11-26 00:37:36,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:37:36" (3/3) ... [2022-11-26 00:37:36,547 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2022-11-26 00:37:36,570 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:37:36,570 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2022-11-26 00:37:36,571 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-26 00:37:36,666 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-26 00:37:36,705 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-26 00:37:36,720 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 177 transitions, 378 flow [2022-11-26 00:37:36,724 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 177 transitions, 378 flow [2022-11-26 00:37:36,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 177 transitions, 378 flow [2022-11-26 00:37:36,800 INFO L130 PetriNetUnfolder]: 12/174 cut-off events. [2022-11-26 00:37:36,800 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-26 00:37:36,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187 conditions, 174 events. 12/174 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 184 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 124. Up to 2 conditions per place. [2022-11-26 00:37:36,810 INFO L119 LiptonReduction]: Number of co-enabled transitions 2418 [2022-11-26 00:38:09,377 INFO L134 LiptonReduction]: Checked pairs total: 3808 [2022-11-26 00:38:09,377 INFO L136 LiptonReduction]: Total number of compositions: 174 [2022-11-26 00:38:09,386 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 57 places, 51 transitions, 126 flow [2022-11-26 00:38:09,480 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1038 states, 904 states have (on average 3.9723451327433628) internal successors, (3591), 1037 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:09,502 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:38:09,514 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;@161e5d42, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:38:09,515 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2022-11-26 00:38:09,519 INFO L276 IsEmpty]: Start isEmpty. Operand has 1038 states, 904 states have (on average 3.9723451327433628) internal successors, (3591), 1037 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:09,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 00:38:09,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:09,525 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 00:38:09,525 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:38:09,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:09,532 INFO L85 PathProgramCache]: Analyzing trace with hash 27162, now seen corresponding path program 1 times [2022-11-26 00:38:09,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:38:09,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [321679925] [2022-11-26 00:38:09,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:09,549 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:09,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:38:09,557 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:38:09,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-26 00:38:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:09,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:38:09,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:09,944 INFO L321 Elim1Store]: treesize reduction 111, result has 19.0 percent of original size [2022-11-26 00:38:09,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 51 [2022-11-26 00:38:10,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:10,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:38:10,047 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:38:10,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [321679925] [2022-11-26 00:38:10,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [321679925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:38:10,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:38:10,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:38:10,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419369525] [2022-11-26 00:38:10,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:10,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:38:10,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:38:10,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:38:10,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:38:10,100 INFO L87 Difference]: Start difference. First operand has 1038 states, 904 states have (on average 3.9723451327433628) internal successors, (3591), 1037 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:10,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:10,478 INFO L93 Difference]: Finished difference Result 856 states and 2869 transitions. [2022-11-26 00:38:10,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:38:10,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-26 00:38:10,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:10,508 INFO L225 Difference]: With dead ends: 856 [2022-11-26 00:38:10,509 INFO L226 Difference]: Without dead ends: 856 [2022-11-26 00:38:10,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:38:10,514 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:10,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 3 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:38:10,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-11-26 00:38:10,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 856. [2022-11-26 00:38:10,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 751 states have (on average 3.8202396804260985) internal successors, (2869), 855 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:10,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2869 transitions. [2022-11-26 00:38:10,637 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2869 transitions. Word has length 2 [2022-11-26 00:38:10,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:10,638 INFO L495 AbstractCegarLoop]: Abstraction has 856 states and 2869 transitions. [2022-11-26 00:38:10,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:10,639 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2869 transitions. [2022-11-26 00:38:10,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 00:38:10,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:10,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 00:38:10,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:10,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:10,854 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:38:10,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:10,855 INFO L85 PathProgramCache]: Analyzing trace with hash 27163, now seen corresponding path program 1 times [2022-11-26 00:38:10,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:38:10,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332363978] [2022-11-26 00:38:10,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:10,860 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:10,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:38:10,862 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:38:10,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-26 00:38:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:11,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:38:11,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:11,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:11,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:11,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:11,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:11,173 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-26 00:38:11,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-26 00:38:11,216 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-26 00:38:11,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-26 00:38:11,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:11,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:38:11,281 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:38:11,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332363978] [2022-11-26 00:38:11,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332363978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:38:11,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:38:11,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:38:11,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454472886] [2022-11-26 00:38:11,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:11,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:38:11,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:38:11,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:38:11,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:38:11,284 INFO L87 Difference]: Start difference. First operand 856 states and 2869 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:11,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:11,583 INFO L93 Difference]: Finished difference Result 675 states and 2148 transitions. [2022-11-26 00:38:11,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:38:11,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-26 00:38:11,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:11,591 INFO L225 Difference]: With dead ends: 675 [2022-11-26 00:38:11,591 INFO L226 Difference]: Without dead ends: 675 [2022-11-26 00:38:11,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:38:11,593 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:11,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:38:11,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-11-26 00:38:11,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 675. [2022-11-26 00:38:11,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 598 states have (on average 3.591973244147157) internal successors, (2148), 674 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:11,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 2148 transitions. [2022-11-26 00:38:11,662 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 2148 transitions. Word has length 2 [2022-11-26 00:38:11,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:11,662 INFO L495 AbstractCegarLoop]: Abstraction has 675 states and 2148 transitions. [2022-11-26 00:38:11,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:11,663 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 2148 transitions. [2022-11-26 00:38:11,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 00:38:11,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:11,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 00:38:11,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:11,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:11,884 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:38:11,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:11,885 INFO L85 PathProgramCache]: Analyzing trace with hash 27003, now seen corresponding path program 1 times [2022-11-26 00:38:11,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:38:11,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1351559255] [2022-11-26 00:38:11,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:11,886 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:11,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:38:11,887 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:38:11,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-26 00:38:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:11,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:38:11,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:12,116 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-26 00:38:12,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-26 00:38:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:12,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:38:12,145 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:38:12,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1351559255] [2022-11-26 00:38:12,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1351559255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:38:12,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:38:12,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:38:12,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446405485] [2022-11-26 00:38:12,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:12,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:38:12,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:38:12,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:38:12,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:38:12,149 INFO L87 Difference]: Start difference. First operand 675 states and 2148 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:12,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:12,387 INFO L93 Difference]: Finished difference Result 674 states and 2147 transitions. [2022-11-26 00:38:12,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:38:12,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-26 00:38:12,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:12,395 INFO L225 Difference]: With dead ends: 674 [2022-11-26 00:38:12,396 INFO L226 Difference]: Without dead ends: 674 [2022-11-26 00:38:12,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:38:12,401 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:12,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 3 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:38:12,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-11-26 00:38:12,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 674. [2022-11-26 00:38:12,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 674 states, 598 states have (on average 3.5903010033444818) internal successors, (2147), 673 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:12,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 674 states to 674 states and 2147 transitions. [2022-11-26 00:38:12,440 INFO L78 Accepts]: Start accepts. Automaton has 674 states and 2147 transitions. Word has length 2 [2022-11-26 00:38:12,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:12,441 INFO L495 AbstractCegarLoop]: Abstraction has 674 states and 2147 transitions. [2022-11-26 00:38:12,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:12,441 INFO L276 IsEmpty]: Start isEmpty. Operand 674 states and 2147 transitions. [2022-11-26 00:38:12,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 00:38:12,442 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:12,442 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 00:38:12,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:12,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:12,656 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:38:12,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:12,657 INFO L85 PathProgramCache]: Analyzing trace with hash 27004, now seen corresponding path program 1 times [2022-11-26 00:38:12,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:38:12,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482718349] [2022-11-26 00:38:12,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:12,659 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:12,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:38:12,661 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:38:12,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-26 00:38:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:12,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:38:12,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:12,919 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:38:12,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:38:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:12,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:38:12,981 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:38:12,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482718349] [2022-11-26 00:38:12,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482718349] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:38:12,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:38:12,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:38:12,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455244417] [2022-11-26 00:38:12,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:12,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:38:12,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:38:12,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:38:12,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:38:12,983 INFO L87 Difference]: Start difference. First operand 674 states and 2147 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:13,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:13,453 INFO L93 Difference]: Finished difference Result 1346 states and 4292 transitions. [2022-11-26 00:38:13,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:38:13,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-26 00:38:13,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:13,464 INFO L225 Difference]: With dead ends: 1346 [2022-11-26 00:38:13,465 INFO L226 Difference]: Without dead ends: 1346 [2022-11-26 00:38:13,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:38:13,470 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 38 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:13,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 6 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:38:13,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2022-11-26 00:38:13,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 675. [2022-11-26 00:38:13,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 599 states have (on average 3.5876460767946576) internal successors, (2149), 674 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:13,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 2149 transitions. [2022-11-26 00:38:13,510 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 2149 transitions. Word has length 2 [2022-11-26 00:38:13,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:13,510 INFO L495 AbstractCegarLoop]: Abstraction has 675 states and 2149 transitions. [2022-11-26 00:38:13,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:13,511 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 2149 transitions. [2022-11-26 00:38:13,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 00:38:13,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:13,512 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 00:38:13,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:13,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:13,726 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:38:13,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:13,727 INFO L85 PathProgramCache]: Analyzing trace with hash 841591, now seen corresponding path program 1 times [2022-11-26 00:38:13,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:38:13,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396390355] [2022-11-26 00:38:13,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:13,728 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:13,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:38:13,729 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:38:13,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-26 00:38:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:13,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:38:13,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:13,993 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:38:13,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:38:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:14,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:38:14,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:14,359 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:38:14,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396390355] [2022-11-26 00:38:14,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1396390355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:38:14,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2086599182] [2022-11-26 00:38:14,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:14,360 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:38:14,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:38:14,364 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:38:14,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-26 00:38:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:14,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:38:14,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:14,680 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:38:14,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:38:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:14,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:38:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:14,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2086599182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:38:14,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411092822] [2022-11-26 00:38:14,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:14,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:14,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:38:14,846 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:38:14,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:38:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:14,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:38:14,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:15,098 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:38:15,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:38:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:15,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:38:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:15,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411092822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:38:15,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:38:15,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-26 00:38:15,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533585416] [2022-11-26 00:38:15,316 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:38:15,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-26 00:38:15,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:38:15,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-26 00:38:15,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:38:15,318 INFO L87 Difference]: Start difference. First operand 675 states and 2149 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:17,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:17,391 INFO L93 Difference]: Finished difference Result 2691 states and 8584 transitions. [2022-11-26 00:38:17,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:38:17,393 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-26 00:38:17,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:17,412 INFO L225 Difference]: With dead ends: 2691 [2022-11-26 00:38:17,412 INFO L226 Difference]: Without dead ends: 2691 [2022-11-26 00:38:17,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:38:17,413 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 265 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:17,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 18 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-26 00:38:17,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2022-11-26 00:38:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 678. [2022-11-26 00:38:17,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 602 states have (on average 3.579734219269103) internal successors, (2155), 677 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:17,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 2155 transitions. [2022-11-26 00:38:17,466 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 2155 transitions. Word has length 3 [2022-11-26 00:38:17,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:17,467 INFO L495 AbstractCegarLoop]: Abstraction has 678 states and 2155 transitions. [2022-11-26 00:38:17,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:17,467 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 2155 transitions. [2022-11-26 00:38:17,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 00:38:17,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:17,468 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 00:38:17,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:17,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:17,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:18,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:18,072 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:38:18,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:18,072 INFO L85 PathProgramCache]: Analyzing trace with hash 26125162, now seen corresponding path program 1 times [2022-11-26 00:38:18,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:38:18,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497285751] [2022-11-26 00:38:18,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:18,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:18,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:38:18,074 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:38:18,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-26 00:38:18,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:18,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:38:18,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:18,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:18,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:18,319 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-26 00:38:18,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-26 00:38:18,339 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 42 treesize of output 38 [2022-11-26 00:38:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:18,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:38:18,444 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:38:18,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497285751] [2022-11-26 00:38:18,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497285751] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:38:18,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:38:18,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:38:18,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76327887] [2022-11-26 00:38:18,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:18,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:38:18,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:38:18,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:38:18,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:38:18,446 INFO L87 Difference]: Start difference. First operand 678 states and 2155 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:18,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:18,674 INFO L93 Difference]: Finished difference Result 637 states and 2037 transitions. [2022-11-26 00:38:18,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:38:18,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-11-26 00:38:18,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:18,679 INFO L225 Difference]: With dead ends: 637 [2022-11-26 00:38:18,679 INFO L226 Difference]: Without dead ends: 637 [2022-11-26 00:38:18,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:38:18,680 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:18,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 3 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:38:18,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-11-26 00:38:18,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 637. [2022-11-26 00:38:18,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 573 states have (on average 3.554973821989529) internal successors, (2037), 636 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:18,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2037 transitions. [2022-11-26 00:38:18,716 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2037 transitions. Word has length 4 [2022-11-26 00:38:18,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:18,716 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 2037 transitions. [2022-11-26 00:38:18,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:18,717 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2037 transitions. [2022-11-26 00:38:18,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-26 00:38:18,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:18,718 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-26 00:38:18,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:18,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:18,930 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:38:18,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:18,931 INFO L85 PathProgramCache]: Analyzing trace with hash 26125163, now seen corresponding path program 1 times [2022-11-26 00:38:18,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:38:18,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063711261] [2022-11-26 00:38:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:18,931 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:18,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:38:18,932 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:38:18,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-26 00:38:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:19,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:38:19,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:19,114 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-26 00:38:19,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 40 [2022-11-26 00:38:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:19,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:38:19,212 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:38:19,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063711261] [2022-11-26 00:38:19,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063711261] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:38:19,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:38:19,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:38:19,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434767135] [2022-11-26 00:38:19,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:19,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:38:19,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:38:19,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:38:19,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:38:19,214 INFO L87 Difference]: Start difference. First operand 637 states and 2037 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:19,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:19,409 INFO L93 Difference]: Finished difference Result 596 states and 1919 transitions. [2022-11-26 00:38:19,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:38:19,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2022-11-26 00:38:19,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:19,414 INFO L225 Difference]: With dead ends: 596 [2022-11-26 00:38:19,415 INFO L226 Difference]: Without dead ends: 596 [2022-11-26 00:38:19,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:38:19,415 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:19,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 3 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:38:19,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-11-26 00:38:19,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 596. [2022-11-26 00:38:19,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 544 states have (on average 3.5275735294117645) internal successors, (1919), 595 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:19,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1919 transitions. [2022-11-26 00:38:19,438 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1919 transitions. Word has length 4 [2022-11-26 00:38:19,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:19,439 INFO L495 AbstractCegarLoop]: Abstraction has 596 states and 1919 transitions. [2022-11-26 00:38:19,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:19,439 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1919 transitions. [2022-11-26 00:38:19,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:38:19,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:19,440 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:38:19,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:19,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:19,653 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:38:19,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:19,654 INFO L85 PathProgramCache]: Analyzing trace with hash 809875026, now seen corresponding path program 1 times [2022-11-26 00:38:19,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:38:19,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292390110] [2022-11-26 00:38:19,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:19,655 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:19,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:38:19,656 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:38:19,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-26 00:38:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:19,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:38:19,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:19,866 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-26 00:38:19,867 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-26 00:38:19,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:19,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:38:19,914 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:38:19,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292390110] [2022-11-26 00:38:19,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292390110] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:38:19,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:38:19,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:38:19,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071588704] [2022-11-26 00:38:19,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:19,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:38:19,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:38:19,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:38:19,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:38:19,916 INFO L87 Difference]: Start difference. First operand 596 states and 1919 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:20,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:20,141 INFO L93 Difference]: Finished difference Result 368 states and 1161 transitions. [2022-11-26 00:38:20,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:38:20,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-26 00:38:20,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:20,145 INFO L225 Difference]: With dead ends: 368 [2022-11-26 00:38:20,145 INFO L226 Difference]: Without dead ends: 368 [2022-11-26 00:38:20,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:38:20,146 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:20,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 3 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:38:20,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-11-26 00:38:20,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 368. [2022-11-26 00:38:20,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 347 states have (on average 3.345821325648415) internal successors, (1161), 367 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:20,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1161 transitions. [2022-11-26 00:38:20,162 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1161 transitions. Word has length 5 [2022-11-26 00:38:20,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:20,163 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 1161 transitions. [2022-11-26 00:38:20,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:20,163 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1161 transitions. [2022-11-26 00:38:20,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:38:20,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:20,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:38:20,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:20,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:20,377 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:38:20,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:20,378 INFO L85 PathProgramCache]: Analyzing trace with hash 809875027, now seen corresponding path program 1 times [2022-11-26 00:38:20,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:38:20,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1724397547] [2022-11-26 00:38:20,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:20,379 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:20,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:38:20,380 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:38:20,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-26 00:38:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:20,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:38:20,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:20,647 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:38:20,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:38:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:20,774 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:38:20,775 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:38:20,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1724397547] [2022-11-26 00:38:20,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1724397547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:38:20,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:38:20,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:38:20,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043898196] [2022-11-26 00:38:20,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:20,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:38:20,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:38:20,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:38:20,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:38:20,777 INFO L87 Difference]: Start difference. First operand 368 states and 1161 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:21,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:21,202 INFO L93 Difference]: Finished difference Result 584 states and 1831 transitions. [2022-11-26 00:38:21,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:38:21,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-26 00:38:21,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:21,207 INFO L225 Difference]: With dead ends: 584 [2022-11-26 00:38:21,208 INFO L226 Difference]: Without dead ends: 584 [2022-11-26 00:38:21,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:38:21,209 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 107 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:21,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 7 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:38:21,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-11-26 00:38:21,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 440. [2022-11-26 00:38:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 419 states have (on average 3.513126491646778) internal successors, (1472), 439 states have internal predecessors, (1472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:21,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1472 transitions. [2022-11-26 00:38:21,227 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1472 transitions. Word has length 5 [2022-11-26 00:38:21,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:21,228 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 1472 transitions. [2022-11-26 00:38:21,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:21,228 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1472 transitions. [2022-11-26 00:38:21,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:38:21,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:21,229 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-26 00:38:21,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:21,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:21,442 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:38:21,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:21,442 INFO L85 PathProgramCache]: Analyzing trace with hash -693530564, now seen corresponding path program 2 times [2022-11-26 00:38:21,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:38:21,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373206559] [2022-11-26 00:38:21,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:38:21,443 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:21,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:38:21,444 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:38:21,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-26 00:38:21,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:38:21,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:38:21,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:38:21,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:21,754 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:38:21,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:38:21,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:21,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:38:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:23,037 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:38:23,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373206559] [2022-11-26 00:38:23,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373206559] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:38:23,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1473097753] [2022-11-26 00:38:23,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:38:23,037 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:38:23,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:38:23,038 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:38:23,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2022-11-26 00:38:23,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:38:23,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:38:23,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:38:23,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:23,419 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:38:23,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:38:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:23,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:38:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:23,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1473097753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:38:23,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992834941] [2022-11-26 00:38:23,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:38:23,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:23,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:38:23,767 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:38:23,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:38:23,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:38:23,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:38:23,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:38:23,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:24,103 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:38:24,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:38:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:24,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:38:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:24,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992834941] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:38:24,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:38:24,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2022-11-26 00:38:24,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175319982] [2022-11-26 00:38:24,482 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:38:24,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:38:24,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:38:24,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:38:24,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:38:24,483 INFO L87 Difference]: Start difference. First operand 440 states and 1472 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:30,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:30,756 INFO L93 Difference]: Finished difference Result 4343 states and 14624 transitions. [2022-11-26 00:38:30,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:38:30,759 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 00:38:30,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:30,794 INFO L225 Difference]: With dead ends: 4343 [2022-11-26 00:38:30,794 INFO L226 Difference]: Without dead ends: 4343 [2022-11-26 00:38:30,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:38:30,795 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 992 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:30,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [992 Valid, 87 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-26 00:38:30,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4343 states. [2022-11-26 00:38:30,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4343 to 446. [2022-11-26 00:38:30,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 425 states have (on average 3.491764705882353) internal successors, (1484), 445 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:30,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1484 transitions. [2022-11-26 00:38:30,860 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1484 transitions. Word has length 6 [2022-11-26 00:38:30,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:30,860 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 1484 transitions. [2022-11-26 00:38:30,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:30,860 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1484 transitions. [2022-11-26 00:38:30,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:38:30,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:30,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:38:30,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:31,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:31,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:31,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:31,465 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:38:31,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:31,466 INFO L85 PathProgramCache]: Analyzing trace with hash -663672735, now seen corresponding path program 1 times [2022-11-26 00:38:31,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:38:31,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176917913] [2022-11-26 00:38:31,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:31,466 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:31,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:38:31,467 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:38:31,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-26 00:38:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:31,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:38:31,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:31,750 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:38:31,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:38:31,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:31,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:38:31,919 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:38:31,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176917913] [2022-11-26 00:38:31,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176917913] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:38:31,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:38:31,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:38:31,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047413658] [2022-11-26 00:38:31,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:31,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:38:31,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:38:31,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:38:31,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:38:31,921 INFO L87 Difference]: Start difference. First operand 446 states and 1484 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:32,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:32,563 INFO L93 Difference]: Finished difference Result 647 states and 1977 transitions. [2022-11-26 00:38:32,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:38:32,563 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 00:38:32,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:32,568 INFO L225 Difference]: With dead ends: 647 [2022-11-26 00:38:32,568 INFO L226 Difference]: Without dead ends: 647 [2022-11-26 00:38:32,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:38:32,569 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 69 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:32,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 13 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:38:32,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2022-11-26 00:38:32,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 617. [2022-11-26 00:38:32,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 596 states have (on average 3.280201342281879) internal successors, (1955), 616 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:32,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1955 transitions. [2022-11-26 00:38:32,596 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1955 transitions. Word has length 6 [2022-11-26 00:38:32,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:32,597 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 1955 transitions. [2022-11-26 00:38:32,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:32,598 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1955 transitions. [2022-11-26 00:38:32,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:38:32,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:32,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:38:32,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:32,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:32,827 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:38:32,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:32,828 INFO L85 PathProgramCache]: Analyzing trace with hash -663503363, now seen corresponding path program 1 times [2022-11-26 00:38:32,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:38:32,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [229189902] [2022-11-26 00:38:32,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:32,828 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:32,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:38:32,830 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:38:32,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-26 00:38:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:32,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:38:32,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:33,026 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-26 00:38:33,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 29 [2022-11-26 00:38:33,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:33,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:38:33,058 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:38:33,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [229189902] [2022-11-26 00:38:33,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [229189902] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:38:33,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:38:33,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:38:33,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111563603] [2022-11-26 00:38:33,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:33,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:38:33,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:38:33,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:38:33,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:38:33,060 INFO L87 Difference]: Start difference. First operand 617 states and 1955 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) [2022-11-26 00:38:33,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:33,216 INFO L93 Difference]: Finished difference Result 575 states and 1831 transitions. [2022-11-26 00:38:33,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:38:33,217 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 [2022-11-26 00:38:33,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:33,220 INFO L225 Difference]: With dead ends: 575 [2022-11-26 00:38:33,220 INFO L226 Difference]: Without dead ends: 575 [2022-11-26 00:38:33,221 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 [2022-11-26 00:38:33,221 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:33,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 3 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:38:33,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-11-26 00:38:33,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2022-11-26 00:38:33,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 560 states have (on average 3.2696428571428573) internal successors, (1831), 574 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:33,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1831 transitions. [2022-11-26 00:38:33,254 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1831 transitions. Word has length 6 [2022-11-26 00:38:33,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:33,255 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 1831 transitions. [2022-11-26 00:38:33,255 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) [2022-11-26 00:38:33,255 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1831 transitions. [2022-11-26 00:38:33,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:38:33,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:33,256 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:38:33,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:33,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:33,469 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:38:33,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:33,470 INFO L85 PathProgramCache]: Analyzing trace with hash -663503362, now seen corresponding path program 1 times [2022-11-26 00:38:33,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:38:33,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1547468163] [2022-11-26 00:38:33,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:33,470 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:33,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:38:33,472 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:38:33,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-26 00:38:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:33,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:38:33,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:33,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:38:33,705 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-26 00:38:33,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-26 00:38:33,732 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 60 treesize of output 58 [2022-11-26 00:38:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:33,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:38:33,829 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:38:33,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1547468163] [2022-11-26 00:38:33,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1547468163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:38:33,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:38:33,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:38:33,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817940856] [2022-11-26 00:38:33,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:33,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:38:33,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:38:33,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:38:33,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:38:33,831 INFO L87 Difference]: Start difference. First operand 575 states and 1831 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) [2022-11-26 00:38:34,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:34,012 INFO L93 Difference]: Finished difference Result 533 states and 1707 transitions. [2022-11-26 00:38:34,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:38:34,013 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 [2022-11-26 00:38:34,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:34,016 INFO L225 Difference]: With dead ends: 533 [2022-11-26 00:38:34,016 INFO L226 Difference]: Without dead ends: 533 [2022-11-26 00:38:34,017 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 [2022-11-26 00:38:34,017 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:34,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 3 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:38:34,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-11-26 00:38:34,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 533. [2022-11-26 00:38:34,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 524 states have (on average 3.2576335877862594) internal successors, (1707), 532 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:34,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 1707 transitions. [2022-11-26 00:38:34,054 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 1707 transitions. Word has length 6 [2022-11-26 00:38:34,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:34,055 INFO L495 AbstractCegarLoop]: Abstraction has 533 states and 1707 transitions. [2022-11-26 00:38:34,055 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) [2022-11-26 00:38:34,055 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 1707 transitions. [2022-11-26 00:38:34,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:38:34,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:34,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:38:34,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:34,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:34,272 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:38:34,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:34,272 INFO L85 PathProgramCache]: Analyzing trace with hash 5251292, now seen corresponding path program 1 times [2022-11-26 00:38:34,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:38:34,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823983768] [2022-11-26 00:38:34,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:34,273 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:34,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:38:34,274 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:38:34,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-26 00:38:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:34,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:38:34,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:34,588 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:38:34,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:38:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:38:34,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:38:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:38:35,370 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:38:35,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1823983768] [2022-11-26 00:38:35,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1823983768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:38:35,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [225419106] [2022-11-26 00:38:35,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:35,371 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:38:35,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:38:35,373 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:38:35,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-11-26 00:38:35,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:35,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:38:35,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:35,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:38:36,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:36,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [225419106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:38:36,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12679140] [2022-11-26 00:38:36,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:36,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:36,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:38:36,179 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:38:36,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-26 00:38:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:36,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:38:36,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:36,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:36,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:38:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:36,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12679140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:38:36,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:38:36,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 18 [2022-11-26 00:38:36,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670352957] [2022-11-26 00:38:36,488 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:38:36,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:38:36,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:38:36,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:38:36,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:38:36,490 INFO L87 Difference]: Start difference. First operand 533 states and 1707 transitions. Second operand has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:41,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:41,903 INFO L93 Difference]: Finished difference Result 1300 states and 4079 transitions. [2022-11-26 00:38:41,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-26 00:38:41,904 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 00:38:41,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:41,910 INFO L225 Difference]: With dead ends: 1300 [2022-11-26 00:38:41,910 INFO L226 Difference]: Without dead ends: 1300 [2022-11-26 00:38:41,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=330, Invalid=1002, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 00:38:41,912 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 663 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:41,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 116 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-26 00:38:41,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-11-26 00:38:41,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 938. [2022-11-26 00:38:41,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 929 states have (on average 3.482238966630786) internal successors, (3235), 937 states have internal predecessors, (3235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:41,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 3235 transitions. [2022-11-26 00:38:41,952 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 3235 transitions. Word has length 7 [2022-11-26 00:38:41,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:41,953 INFO L495 AbstractCegarLoop]: Abstraction has 938 states and 3235 transitions. [2022-11-26 00:38:41,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:41,953 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 3235 transitions. [2022-11-26 00:38:41,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:38:41,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:41,954 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:38:41,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:42,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:42,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:42,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:42,558 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:38:42,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:42,559 INFO L85 PathProgramCache]: Analyzing trace with hash 906227397, now seen corresponding path program 1 times [2022-11-26 00:38:42,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:38:42,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356763862] [2022-11-26 00:38:42,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:42,559 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:42,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:38:42,561 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:38:42,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-26 00:38:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:42,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:38:42,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:42,832 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:38:42,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:38:43,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:43,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:38:43,077 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:38:43,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356763862] [2022-11-26 00:38:43,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356763862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:38:43,077 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:38:43,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:38:43,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966150483] [2022-11-26 00:38:43,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:43,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:38:43,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:38:43,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:38:43,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:38:43,079 INFO L87 Difference]: Start difference. First operand 938 states and 3235 transitions. Second operand has 5 states, 4 states have (on average 1.75) 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) [2022-11-26 00:38:43,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:43,614 INFO L93 Difference]: Finished difference Result 1424 states and 4937 transitions. [2022-11-26 00:38:43,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:38:43,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) 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 [2022-11-26 00:38:43,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:43,620 INFO L225 Difference]: With dead ends: 1424 [2022-11-26 00:38:43,620 INFO L226 Difference]: Without dead ends: 1424 [2022-11-26 00:38:43,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:38:43,621 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 85 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:43,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 4 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:38:43,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2022-11-26 00:38:43,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1086. [2022-11-26 00:38:43,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1077 states have (on average 3.6239554317548746) internal successors, (3903), 1085 states have internal predecessors, (3903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:43,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 3903 transitions. [2022-11-26 00:38:43,668 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 3903 transitions. Word has length 7 [2022-11-26 00:38:43,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:43,668 INFO L495 AbstractCegarLoop]: Abstraction has 1086 states and 3903 transitions. [2022-11-26 00:38:43,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) 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) [2022-11-26 00:38:43,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 3903 transitions. [2022-11-26 00:38:43,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:38:43,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:43,670 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:38:43,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:43,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:43,883 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:38:43,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:43,884 INFO L85 PathProgramCache]: Analyzing trace with hash -988585633, now seen corresponding path program 1 times [2022-11-26 00:38:43,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:38:43,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121385607] [2022-11-26 00:38:43,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:43,885 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:43,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:38:43,886 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:38:43,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-26 00:38:44,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:44,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:38:44,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:44,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:44,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:38:44,182 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:38:44,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121385607] [2022-11-26 00:38:44,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121385607] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:38:44,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:38:44,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:38:44,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271099601] [2022-11-26 00:38:44,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:44,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:38:44,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:38:44,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:38:44,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:38:44,184 INFO L87 Difference]: Start difference. First operand 1086 states and 3903 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) [2022-11-26 00:38:44,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:44,637 INFO L93 Difference]: Finished difference Result 1130 states and 3970 transitions. [2022-11-26 00:38:44,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:38:44,637 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 [2022-11-26 00:38:44,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:44,641 INFO L225 Difference]: With dead ends: 1130 [2022-11-26 00:38:44,641 INFO L226 Difference]: Without dead ends: 1130 [2022-11-26 00:38:44,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:38:44,642 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 44 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:44,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 11 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:38:44,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-11-26 00:38:44,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 1112. [2022-11-26 00:38:44,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1103 states have (on average 3.5775158658204895) internal successors, (3946), 1111 states have internal predecessors, (3946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:38:44,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3946 transitions. [2022-11-26 00:38:44,681 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3946 transitions. Word has length 9 [2022-11-26 00:38:44,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:44,682 INFO L495 AbstractCegarLoop]: Abstraction has 1112 states and 3946 transitions. [2022-11-26 00:38:44,682 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) [2022-11-26 00:38:44,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3946 transitions. [2022-11-26 00:38:44,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:38:44,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:44,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:38:44,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:44,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:44,897 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:38:44,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:44,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1726375359, now seen corresponding path program 1 times [2022-11-26 00:38:44,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:38:44,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165803430] [2022-11-26 00:38:44,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:44,898 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:38:44,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:38:44,899 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:38:44,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-26 00:38:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:45,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:38:45,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:45,172 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:38:45,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:38:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:38:45,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:38:46,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:38:46,214 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:38:46,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165803430] [2022-11-26 00:38:46,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165803430] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:38:46,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1566669131] [2022-11-26 00:38:46,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:46,214 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:38:46,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:38:46,216 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:38:46,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-26 00:38:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:46,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:38:46,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:46,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:38:47,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:47,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1566669131] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:38:47,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46319568] [2022-11-26 00:38:47,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:47,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:47,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:38:47,329 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:38:47,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-26 00:38:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:47,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:38:47,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:47,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:47,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:38:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:38:47,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46319568] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:38:47,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:38:47,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6, 6, 6, 6] total 22 [2022-11-26 00:38:47,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18767543] [2022-11-26 00:38:47,692 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:38:47,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 00:38:47,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:38:47,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 00:38:47,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:38:47,694 INFO L87 Difference]: Start difference. First operand 1112 states and 3946 transitions. Second operand has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:01,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:01,989 INFO L93 Difference]: Finished difference Result 2470 states and 8449 transitions. [2022-11-26 00:39:01,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 00:39:01,991 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-26 00:39:01,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:02,003 INFO L225 Difference]: With dead ends: 2470 [2022-11-26 00:39:02,003 INFO L226 Difference]: Without dead ends: 2470 [2022-11-26 00:39:02,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=464, Invalid=1516, Unknown=0, NotChecked=0, Total=1980 [2022-11-26 00:39:02,004 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1102 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1102 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:02,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1102 Valid, 79 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-26 00:39:02,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2470 states. [2022-11-26 00:39:02,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2470 to 1806. [2022-11-26 00:39:02,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1797 states have (on average 3.7968836950473013) internal successors, (6823), 1805 states have internal predecessors, (6823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:02,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 6823 transitions. [2022-11-26 00:39:02,089 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 6823 transitions. Word has length 10 [2022-11-26 00:39:02,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:02,090 INFO L495 AbstractCegarLoop]: Abstraction has 1806 states and 6823 transitions. [2022-11-26 00:39:02,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:02,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 6823 transitions. [2022-11-26 00:39:02,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:39:02,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:02,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:39:02,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-26 00:39:02,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-26 00:39:02,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-26 00:39:02,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:39:02,711 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:39:02,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:02,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1721150716, now seen corresponding path program 1 times [2022-11-26 00:39:02,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:39:02,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686973494] [2022-11-26 00:39:02,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:02,713 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:39:02,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:39:02,715 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:39:02,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-26 00:39:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:02,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-26 00:39:02,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:03,091 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:39:03,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:39:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:03,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:39:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:04,917 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:39:04,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686973494] [2022-11-26 00:39:04,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686973494] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:39:04,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [912212722] [2022-11-26 00:39:04,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:04,918 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:39:04,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:39:04,919 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:39:04,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-26 00:39:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:05,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 00:39:05,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:05,347 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:39:05,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:39:05,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:05,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:39:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:06,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [912212722] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:39:06,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506467012] [2022-11-26 00:39:06,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:39:06,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:06,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:06,151 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:39:06,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-26 00:39:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:39:06,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 00:39:06,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:06,525 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:39:06,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:39:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:06,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:39:07,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:07,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506467012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:39:07,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:39:07,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-11-26 00:39:07,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413372310] [2022-11-26 00:39:07,254 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:39:07,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-26 00:39:07,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:39:07,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-26 00:39:07,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-26 00:39:07,256 INFO L87 Difference]: Start difference. First operand 1806 states and 6823 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:16,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:39:16,165 INFO L93 Difference]: Finished difference Result 3781 states and 14586 transitions. [2022-11-26 00:39:16,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:39:16,167 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-26 00:39:16,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:39:16,187 INFO L225 Difference]: With dead ends: 3781 [2022-11-26 00:39:16,187 INFO L226 Difference]: Without dead ends: 3781 [2022-11-26 00:39:16,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:39:16,188 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 257 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:39:16,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 49 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-26 00:39:16,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3781 states. [2022-11-26 00:39:16,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3781 to 2649. [2022-11-26 00:39:16,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2649 states, 2640 states have (on average 3.918939393939394) internal successors, (10346), 2648 states have internal predecessors, (10346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:16,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2649 states to 2649 states and 10346 transitions. [2022-11-26 00:39:16,337 INFO L78 Accepts]: Start accepts. Automaton has 2649 states and 10346 transitions. Word has length 10 [2022-11-26 00:39:16,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:39:16,337 INFO L495 AbstractCegarLoop]: Abstraction has 2649 states and 10346 transitions. [2022-11-26 00:39:16,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:39:16,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2649 states and 10346 transitions. [2022-11-26 00:39:16,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-26 00:39:16,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:39:16,339 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2022-11-26 00:39:16,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-26 00:39:16,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2022-11-26 00:39:16,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-26 00:39:16,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:39:16,948 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:39:16,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:39:16,948 INFO L85 PathProgramCache]: Analyzing trace with hash 592903795, now seen corresponding path program 2 times [2022-11-26 00:39:16,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:39:16,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1139485015] [2022-11-26 00:39:16,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:39:16,949 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:39:16,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:39:16,951 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:39:16,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-26 00:39:17,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:39:17,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:39:17,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 00:39:17,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:17,373 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:39:17,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:39:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:17,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:39:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:39:19,849 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:39:19,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1139485015] [2022-11-26 00:39:19,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1139485015] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:39:19,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [917013599] [2022-11-26 00:39:19,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:39:19,849 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:39:19,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:39:19,851 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:39:19,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-26 00:39:20,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:39:20,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:39:20,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:39:20,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:20,451 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:39:20,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:39:20,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:39:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:39:21,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:39:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:39:22,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [917013599] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:39:22,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884473046] [2022-11-26 00:39:22,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:39:22,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:39:22,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:39:22,601 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:39:22,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-26 00:39:22,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:39:22,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:39:22,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:39:22,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:39:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:39:23,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:39:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:39:23,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884473046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:39:23,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:39:23,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 36 [2022-11-26 00:39:23,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616689132] [2022-11-26 00:39:24,000 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:39:24,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-26 00:39:24,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:39:24,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-26 00:39:24,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2022-11-26 00:39:24,003 INFO L87 Difference]: Start difference. First operand 2649 states and 10346 transitions. Second operand has 37 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 36 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:05,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:05,503 INFO L93 Difference]: Finished difference Result 6474 states and 23957 transitions. [2022-11-26 00:40:05,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-26 00:40:05,505 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 36 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-26 00:40:05,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:05,565 INFO L225 Difference]: With dead ends: 6474 [2022-11-26 00:40:05,565 INFO L226 Difference]: Without dead ends: 6474 [2022-11-26 00:40:05,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=732, Invalid=3690, Unknown=0, NotChecked=0, Total=4422 [2022-11-26 00:40:05,568 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1365 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 4590 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1365 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 4613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 4590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:05,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1365 Valid, 616 Invalid, 4613 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [23 Valid, 4590 Invalid, 0 Unknown, 0 Unchecked, 23.5s Time] [2022-11-26 00:40:05,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6474 states. [2022-11-26 00:40:05,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6474 to 3664. [2022-11-26 00:40:05,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3664 states, 3655 states have (on average 3.987688098495212) internal successors, (14575), 3663 states have internal predecessors, (14575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:05,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3664 states to 3664 states and 14575 transitions. [2022-11-26 00:40:05,804 INFO L78 Accepts]: Start accepts. Automaton has 3664 states and 14575 transitions. Word has length 11 [2022-11-26 00:40:05,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:05,805 INFO L495 AbstractCegarLoop]: Abstraction has 3664 states and 14575 transitions. [2022-11-26 00:40:05,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 36 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:05,806 INFO L276 IsEmpty]: Start isEmpty. Operand 3664 states and 14575 transitions. [2022-11-26 00:40:05,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:40:05,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:05,808 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-26 00:40:05,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-26 00:40:06,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-26 00:40:06,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-11-26 00:40:06,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:40:06,425 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:40:06,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:06,426 INFO L85 PathProgramCache]: Analyzing trace with hash 535410268, now seen corresponding path program 3 times [2022-11-26 00:40:06,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:40:06,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429105180] [2022-11-26 00:40:06,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:40:06,427 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:40:06,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:40:06,428 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:40:06,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-26 00:40:06,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 00:40:06,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:40:06,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:40:06,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:40:07,052 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:40:07,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:40:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:07,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:40:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:11,332 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:40:11,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429105180] [2022-11-26 00:40:11,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429105180] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:40:11,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [437403822] [2022-11-26 00:40:11,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:40:11,333 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:40:11,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:40:11,334 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:40:11,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-26 00:40:12,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 00:40:12,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:40:12,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:40:12,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:40:12,544 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:40:12,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:40:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:12,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:40:13,269 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:13,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [437403822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:40:13,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737727529] [2022-11-26 00:40:13,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:40:13,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:40:13,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:40:13,271 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:40:13,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-26 00:40:15,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 00:40:15,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:40:15,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:40:15,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:40:15,276 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:40:15,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:40:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:15,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:40:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:15,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737727529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:40:15,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:40:15,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 22 [2022-11-26 00:40:15,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374640962] [2022-11-26 00:40:15,933 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:40:15,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 00:40:15,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:40:15,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 00:40:15,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:40:15,935 INFO L87 Difference]: Start difference. First operand 3664 states and 14575 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:43,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:40:43,744 INFO L93 Difference]: Finished difference Result 29517 states and 116331 transitions. [2022-11-26 00:40:43,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 00:40:43,746 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-26 00:40:43,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:40:44,115 INFO L225 Difference]: With dead ends: 29517 [2022-11-26 00:40:44,115 INFO L226 Difference]: Without dead ends: 29517 [2022-11-26 00:40:44,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:40:44,119 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 3398 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 3180 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3398 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 3182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:40:44,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3398 Valid, 393 Invalid, 3182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3180 Invalid, 0 Unknown, 0 Unchecked, 13.5s Time] [2022-11-26 00:40:44,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29517 states. [2022-11-26 00:40:44,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29517 to 3676. [2022-11-26 00:40:44,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3676 states, 3667 states have (on average 3.981183528770112) internal successors, (14599), 3675 states have internal predecessors, (14599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:44,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3676 states to 3676 states and 14599 transitions. [2022-11-26 00:40:44,735 INFO L78 Accepts]: Start accepts. Automaton has 3676 states and 14599 transitions. Word has length 12 [2022-11-26 00:40:44,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:40:44,736 INFO L495 AbstractCegarLoop]: Abstraction has 3676 states and 14599 transitions. [2022-11-26 00:40:44,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:40:44,736 INFO L276 IsEmpty]: Start isEmpty. Operand 3676 states and 14599 transitions. [2022-11-26 00:40:44,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:40:44,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:40:44,738 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-11-26 00:40:44,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-26 00:40:44,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-11-26 00:40:45,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-11-26 00:40:45,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:40:45,349 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:40:45,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:40:45,350 INFO L85 PathProgramCache]: Analyzing trace with hash -145061101, now seen corresponding path program 3 times [2022-11-26 00:40:45,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:40:45,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1607975173] [2022-11-26 00:40:45,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:40:45,351 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:40:45,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:40:45,353 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:40:45,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-26 00:40:45,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:40:45,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:40:45,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:40:45,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:40:45,909 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:40:45,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:40:46,266 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:40:46,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:40:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:40:47,555 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:40:47,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1607975173] [2022-11-26 00:40:47,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1607975173] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:40:47,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [841503156] [2022-11-26 00:40:47,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:40:47,555 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:40:47,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:40:47,556 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:40:47,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-26 00:40:48,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:40:48,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:40:48,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-26 00:40:48,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:40:48,199 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:40:48,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:40:49,120 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 [2022-11-26 00:40:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:49,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:40:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:52,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [841503156] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:40:52,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094419468] [2022-11-26 00:40:52,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:40:52,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:40:52,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:40:52,136 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:40:52,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-26 00:40:52,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:40:52,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:40:52,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 00:40:52,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:40:53,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:53,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:40:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:40:55,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094419468] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:40:55,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:40:55,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 11, 11, 11, 11] total 56 [2022-11-26 00:40:55,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303109149] [2022-11-26 00:40:55,716 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:40:55,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-26 00:40:55,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:40:55,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-26 00:40:55,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=2793, Unknown=0, NotChecked=0, Total=3306 [2022-11-26 00:40:55,718 INFO L87 Difference]: Start difference. First operand 3676 states and 14599 transitions. Second operand has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:44,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:44,394 INFO L93 Difference]: Finished difference Result 9799 states and 34958 transitions. [2022-11-26 00:41:44,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-26 00:41:44,396 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:41:44,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:44,466 INFO L225 Difference]: With dead ends: 9799 [2022-11-26 00:41:44,467 INFO L226 Difference]: Without dead ends: 9799 [2022-11-26 00:41:44,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3733 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=2285, Invalid=10371, Unknown=0, NotChecked=0, Total=12656 [2022-11-26 00:41:44,471 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 5345 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 8769 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5345 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 8885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 8769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:44,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5345 Valid, 1182 Invalid, 8885 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [116 Valid, 8769 Invalid, 0 Unknown, 0 Unchecked, 23.8s Time] [2022-11-26 00:41:44,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9799 states. [2022-11-26 00:41:44,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9799 to 5079. [2022-11-26 00:41:44,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5079 states, 5070 states have (on average 4.053254437869822) internal successors, (20550), 5078 states have internal predecessors, (20550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:44,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5079 states to 5079 states and 20550 transitions. [2022-11-26 00:41:44,808 INFO L78 Accepts]: Start accepts. Automaton has 5079 states and 20550 transitions. Word has length 13 [2022-11-26 00:41:44,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:44,811 INFO L495 AbstractCegarLoop]: Abstraction has 5079 states and 20550 transitions. [2022-11-26 00:41:44,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:44,812 INFO L276 IsEmpty]: Start isEmpty. Operand 5079 states and 20550 transitions. [2022-11-26 00:41:44,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:41:44,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:44,814 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:44,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-26 00:41:45,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-26 00:41:45,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-26 00:41:45,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:45,420 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:41:45,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:45,420 INFO L85 PathProgramCache]: Analyzing trace with hash 601170591, now seen corresponding path program 2 times [2022-11-26 00:41:45,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:41:45,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [492055534] [2022-11-26 00:41:45,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:41:45,421 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:41:45,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:41:45,422 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:41:45,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-26 00:41:45,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-26 00:41:45,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:41:45,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:41:45,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:41:45,791 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:41:45,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:41:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-26 00:41:46,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:41:46,074 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:41:46,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [492055534] [2022-11-26 00:41:46,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [492055534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:41:46,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:41:46,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:41:46,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136165376] [2022-11-26 00:41:46,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:41:46,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:41:46,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:41:46,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:41:46,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:41:46,076 INFO L87 Difference]: Start difference. First operand 5079 states and 20550 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:46,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:41:46,624 INFO L93 Difference]: Finished difference Result 7011 states and 28459 transitions. [2022-11-26 00:41:46,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:41:46,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:41:46,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:41:46,648 INFO L225 Difference]: With dead ends: 7011 [2022-11-26 00:41:46,648 INFO L226 Difference]: Without dead ends: 7011 [2022-11-26 00:41:46,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:41:46,649 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 77 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:41:46,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 6 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:41:46,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7011 states. [2022-11-26 00:41:46,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7011 to 5231. [2022-11-26 00:41:46,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5231 states, 5222 states have (on average 4.1997319034852545) internal successors, (21931), 5230 states have internal predecessors, (21931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:46,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5231 states to 5231 states and 21931 transitions. [2022-11-26 00:41:46,859 INFO L78 Accepts]: Start accepts. Automaton has 5231 states and 21931 transitions. Word has length 13 [2022-11-26 00:41:46,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:41:46,860 INFO L495 AbstractCegarLoop]: Abstraction has 5231 states and 21931 transitions. [2022-11-26 00:41:46,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:41:46,860 INFO L276 IsEmpty]: Start isEmpty. Operand 5231 states and 21931 transitions. [2022-11-26 00:41:46,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:41:46,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:41:46,863 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:41:46,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-26 00:41:47,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:41:47,076 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:41:47,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:41:47,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1580960309, now seen corresponding path program 1 times [2022-11-26 00:41:47,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:41:47,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [838334661] [2022-11-26 00:41:47,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:47,078 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:41:47,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:41:47,079 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:41:47,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-26 00:41:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:47,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-26 00:41:47,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:41:47,557 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:41:47,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:41:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:48,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:41:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:50,931 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:41:50,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [838334661] [2022-11-26 00:41:50,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [838334661] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:41:50,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [805967667] [2022-11-26 00:41:50,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:50,932 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:41:50,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:41:50,933 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:41:50,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-26 00:41:51,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:51,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-26 00:41:51,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:41:51,420 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:41:51,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:41:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:52,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:41:56,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:56,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [805967667] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:41:56,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781398171] [2022-11-26 00:41:56,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:41:56,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:41:56,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:41:56,380 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:41:56,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-26 00:41:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:41:56,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-26 00:41:56,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:41:56,730 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:41:56,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:41:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:57,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:41:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:41:59,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781398171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:41:59,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:41:59,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 25 [2022-11-26 00:41:59,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31584449] [2022-11-26 00:41:59,787 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:41:59,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-26 00:41:59,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:41:59,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-26 00:41:59,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:41:59,789 INFO L87 Difference]: Start difference. First operand 5231 states and 21931 transitions. Second operand has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:42:44,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:42:44,674 INFO L93 Difference]: Finished difference Result 10220 states and 43274 transitions. [2022-11-26 00:42:44,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-26 00:42:44,678 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:42:44,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:42:44,717 INFO L225 Difference]: With dead ends: 10220 [2022-11-26 00:42:44,717 INFO L226 Difference]: Without dead ends: 10220 [2022-11-26 00:42:44,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 39.8s TimeCoverageRelationStatistics Valid=747, Invalid=2115, Unknown=0, NotChecked=0, Total=2862 [2022-11-26 00:42:44,718 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 841 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:42:44,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 201 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1447 Invalid, 0 Unknown, 0 Unchecked, 11.9s Time] [2022-11-26 00:42:44,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10220 states. [2022-11-26 00:42:44,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10220 to 7626. [2022-11-26 00:42:44,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7626 states, 7617 states have (on average 4.266771694893002) internal successors, (32500), 7625 states have internal predecessors, (32500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:42:45,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7626 states to 7626 states and 32500 transitions. [2022-11-26 00:42:45,019 INFO L78 Accepts]: Start accepts. Automaton has 7626 states and 32500 transitions. Word has length 13 [2022-11-26 00:42:45,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:42:45,019 INFO L495 AbstractCegarLoop]: Abstraction has 7626 states and 32500 transitions. [2022-11-26 00:42:45,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:42:45,020 INFO L276 IsEmpty]: Start isEmpty. Operand 7626 states and 32500 transitions. [2022-11-26 00:42:45,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:42:45,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:42:45,024 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:42:45,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-26 00:42:45,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-26 00:42:45,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2022-11-26 00:42:45,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:42:45,637 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:42:45,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:42:45,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1345733916, now seen corresponding path program 2 times [2022-11-26 00:42:45,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:42:45,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827036343] [2022-11-26 00:42:45,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:42:45,638 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:42:45,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:42:45,639 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:42:45,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-26 00:42:45,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:42:45,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:42:45,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 00:42:45,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:42:46,020 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:42:46,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:42:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:42:46,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:42:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:42:47,341 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:42:47,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827036343] [2022-11-26 00:42:47,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827036343] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:42:47,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1575279948] [2022-11-26 00:42:47,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:42:47,342 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:42:47,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:42:47,343 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:42:47,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-26 00:42:47,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:42:47,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:42:47,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:42:47,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:42:48,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:42:48,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:42:49,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:42:49,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1575279948] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:42:49,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447780187] [2022-11-26 00:42:49,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:42:49,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:42:49,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:42:49,435 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:42:49,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-26 00:42:49,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:42:49,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:42:49,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 00:42:49,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:42:49,831 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:42:49,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:42:50,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:42:50,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:42:52,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:42:52,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447780187] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:42:52,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:42:52,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 33 [2022-11-26 00:42:52,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000076689] [2022-11-26 00:42:52,128 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:42:52,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-26 00:42:52,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:42:52,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-26 00:42:52,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:42:52,130 INFO L87 Difference]: Start difference. First operand 7626 states and 32500 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:02,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:43:02,858 INFO L93 Difference]: Finished difference Result 7630 states and 32239 transitions. [2022-11-26 00:43:02,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 00:43:02,860 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-26 00:43:02,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:43:02,886 INFO L225 Difference]: With dead ends: 7630 [2022-11-26 00:43:02,886 INFO L226 Difference]: Without dead ends: 7630 [2022-11-26 00:43:02,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=362, Invalid=1618, Unknown=0, NotChecked=0, Total=1980 [2022-11-26 00:43:02,887 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 512 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:43:02,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 200 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1511 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-11-26 00:43:02,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7630 states. [2022-11-26 00:43:03,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7630 to 7522. [2022-11-26 00:43:03,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7522 states, 7513 states have (on average 4.26287767869027) internal successors, (32027), 7521 states have internal predecessors, (32027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7522 states to 7522 states and 32027 transitions. [2022-11-26 00:43:03,174 INFO L78 Accepts]: Start accepts. Automaton has 7522 states and 32027 transitions. Word has length 14 [2022-11-26 00:43:03,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:43:03,174 INFO L495 AbstractCegarLoop]: Abstraction has 7522 states and 32027 transitions. [2022-11-26 00:43:03,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:43:03,174 INFO L276 IsEmpty]: Start isEmpty. Operand 7522 states and 32027 transitions. [2022-11-26 00:43:03,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:43:03,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:43:03,180 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:43:03,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-11-26 00:43:03,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-11-26 00:43:03,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-26 00:43:03,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:43:03,785 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:43:03,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:43:03,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1723861892, now seen corresponding path program 3 times [2022-11-26 00:43:03,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:43:03,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [348037996] [2022-11-26 00:43:03,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:43:03,787 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:43:03,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:43:03,788 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:43:03,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-26 00:43:04,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:43:04,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:43:04,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-26 00:43:04,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:04,229 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:43:04,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:43:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:43:05,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:43:09,693 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:43:09,693 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:43:09,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [348037996] [2022-11-26 00:43:09,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [348037996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:43:09,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2077425065] [2022-11-26 00:43:09,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:43:09,694 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:43:09,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:43:09,695 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:43:09,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-26 00:43:10,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:43:10,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:43:10,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-26 00:43:10,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:10,404 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:43:10,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:43:10,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:43:10,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:43:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:43:14,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2077425065] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:43:14,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699322644] [2022-11-26 00:43:14,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:43:14,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:43:14,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:43:14,897 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:43:14,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-26 00:43:15,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:43:15,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:43:15,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-26 00:43:15,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:43:15,546 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:43:15,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:43:16,583 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:43:16,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:43:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:43:22,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699322644] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:43:22,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:43:22,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 10] total 33 [2022-11-26 00:43:22,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238209814] [2022-11-26 00:43:22,825 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:43:22,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-26 00:43:22,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:43:22,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-26 00:43:22,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2022-11-26 00:43:22,827 INFO L87 Difference]: Start difference. First operand 7522 states and 32027 transitions. Second operand has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:29,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:44:29,928 INFO L93 Difference]: Finished difference Result 15205 states and 64395 transitions. [2022-11-26 00:44:29,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-26 00:44:29,933 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-26 00:44:29,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:44:29,988 INFO L225 Difference]: With dead ends: 15205 [2022-11-26 00:44:29,989 INFO L226 Difference]: Without dead ends: 15205 [2022-11-26 00:44:29,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 57.8s TimeCoverageRelationStatistics Valid=1245, Invalid=4011, Unknown=0, NotChecked=0, Total=5256 [2022-11-26 00:44:29,990 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 1754 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 2743 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1754 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 2798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:44:29,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1754 Valid, 393 Invalid, 2798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2743 Invalid, 0 Unknown, 0 Unchecked, 21.5s Time] [2022-11-26 00:44:30,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15205 states. [2022-11-26 00:44:30,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15205 to 9867. [2022-11-26 00:44:30,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9867 states, 9858 states have (on average 4.409007912355447) internal successors, (43464), 9866 states have internal predecessors, (43464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:30,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9867 states to 9867 states and 43464 transitions. [2022-11-26 00:44:30,595 INFO L78 Accepts]: Start accepts. Automaton has 9867 states and 43464 transitions. Word has length 16 [2022-11-26 00:44:30,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:44:30,595 INFO L495 AbstractCegarLoop]: Abstraction has 9867 states and 43464 transitions. [2022-11-26 00:44:30,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 34 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:44:30,596 INFO L276 IsEmpty]: Start isEmpty. Operand 9867 states and 43464 transitions. [2022-11-26 00:44:30,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-26 00:44:30,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:44:30,602 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:44:30,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:30,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:31,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-26 00:44:31,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:44:31,203 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:44:31,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:44:31,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1531156235, now seen corresponding path program 4 times [2022-11-26 00:44:31,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:44:31,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [507748708] [2022-11-26 00:44:31,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:44:31,204 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:44:31,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:44:31,205 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:44:31,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-26 00:44:31,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:44:31,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:44:31,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-26 00:44:31,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:31,577 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:44:31,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:44:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:32,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:44:39,133 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:39,133 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:44:39,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [507748708] [2022-11-26 00:44:39,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [507748708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:44:39,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [771778909] [2022-11-26 00:44:39,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:44:39,134 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:44:39,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:44:39,135 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:44:39,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-26 00:44:39,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:44:39,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:44:39,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-26 00:44:39,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:39,799 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:44:39,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:44:41,297 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:41,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:44:52,700 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:52,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [771778909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:44:52,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361076926] [2022-11-26 00:44:52,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:44:52,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:44:52,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:44:52,702 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:44:52,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-26 00:44:52,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:44:52,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:44:52,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-26 00:44:52,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:44:53,116 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:44:53,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:44:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:44:54,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:45:03,576 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:45:03,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361076926] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:45:03,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:45:03,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 47 [2022-11-26 00:45:03,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053211256] [2022-11-26 00:45:03,577 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:45:03,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-26 00:45:03,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:45:03,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-26 00:45:03,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1882, Unknown=0, NotChecked=0, Total=2352 [2022-11-26 00:45:03,579 INFO L87 Difference]: Start difference. First operand 9867 states and 43464 transitions. Second operand has 49 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:46:34,330 WARN L233 SmtUtils]: Spent 5.07s on a formula simplification. DAG size of input: 122 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:47:11,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:47:11,646 INFO L93 Difference]: Finished difference Result 23591 states and 101343 transitions. [2022-11-26 00:47:11,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-11-26 00:47:11,650 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-26 00:47:11,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:47:11,729 INFO L225 Difference]: With dead ends: 23591 [2022-11-26 00:47:11,730 INFO L226 Difference]: Without dead ends: 23591 [2022-11-26 00:47:11,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2747 ImplicationChecksByTransitivity, 104.0s TimeCoverageRelationStatistics Valid=2770, Invalid=8572, Unknown=0, NotChecked=0, Total=11342 [2022-11-26 00:47:11,732 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 2837 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 7965 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2837 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 8068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 7965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:47:11,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2837 Valid, 1106 Invalid, 8068 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [103 Valid, 7965 Invalid, 0 Unknown, 0 Unchecked, 48.0s Time] [2022-11-26 00:47:11,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23591 states. [2022-11-26 00:47:12,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23591 to 10056. [2022-11-26 00:47:12,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10056 states, 10047 states have (on average 4.34089778043197) internal successors, (43613), 10055 states have internal predecessors, (43613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:47:12,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10056 states to 10056 states and 43613 transitions. [2022-11-26 00:47:12,291 INFO L78 Accepts]: Start accepts. Automaton has 10056 states and 43613 transitions. Word has length 17 [2022-11-26 00:47:12,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:47:12,291 INFO L495 AbstractCegarLoop]: Abstraction has 10056 states and 43613 transitions. [2022-11-26 00:47:12,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:47:12,291 INFO L276 IsEmpty]: Start isEmpty. Operand 10056 states and 43613 transitions. [2022-11-26 00:47:12,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-26 00:47:12,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:47:12,376 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:47:12,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-26 00:47:12,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-11-26 00:47:12,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-11-26 00:47:12,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:47:12,977 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:47:12,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:47:12,977 INFO L85 PathProgramCache]: Analyzing trace with hash -563726271, now seen corresponding path program 2 times [2022-11-26 00:47:12,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:47:12,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522977931] [2022-11-26 00:47:12,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:47:12,978 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:47:12,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:47:12,979 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:47:12,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-26 00:47:13,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:47:13,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:47:13,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 00:47:13,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:47:13,347 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:47:13,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:47:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:47:13,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:47:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:47:16,014 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:47:16,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522977931] [2022-11-26 00:47:16,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522977931] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:47:16,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1811485770] [2022-11-26 00:47:16,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:47:16,015 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:47:16,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:47:16,016 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:47:16,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-26 00:47:16,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:47:16,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:47:16,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-26 00:47:16,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:47:16,635 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:47:16,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:47:16,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-26 00:47:17,870 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:47:17,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:47:19,561 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:47:19,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1811485770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:47:19,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633124959] [2022-11-26 00:47:19,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:47:19,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:47:19,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:47:19,563 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:47:19,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-26 00:47:19,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:47:19,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:47:19,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:47:19,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:47:19,953 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:47:19,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:47:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:47:21,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:47:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:47:22,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633124959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:47:22,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:47:22,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9, 9, 8, 8] total 48 [2022-11-26 00:47:22,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776785535] [2022-11-26 00:47:22,846 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:47:22,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-26 00:47:22,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:47:22,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-26 00:47:22,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2113, Unknown=0, NotChecked=0, Total=2352 [2022-11-26 00:47:22,847 INFO L87 Difference]: Start difference. First operand 10056 states and 43613 transitions. Second operand has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 48 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:48:17,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:48:17,868 INFO L93 Difference]: Finished difference Result 11430 states and 47207 transitions. [2022-11-26 00:48:17,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-26 00:48:17,871 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 48 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-26 00:48:17,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:48:17,905 INFO L225 Difference]: With dead ends: 11430 [2022-11-26 00:48:17,905 INFO L226 Difference]: Without dead ends: 11430 [2022-11-26 00:48:17,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=1173, Invalid=6483, Unknown=0, NotChecked=0, Total=7656 [2022-11-26 00:48:17,908 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1630 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 5997 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1630 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 6030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 5997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:48:17,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1630 Valid, 534 Invalid, 6030 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [33 Valid, 5997 Invalid, 0 Unknown, 0 Unchecked, 27.6s Time] [2022-11-26 00:48:17,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11430 states. [2022-11-26 00:48:18,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11430 to 10276. [2022-11-26 00:48:18,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10276 states, 10267 states have (on average 4.318203954417064) internal successors, (44335), 10275 states have internal predecessors, (44335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:48:18,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10276 states to 10276 states and 44335 transitions. [2022-11-26 00:48:18,161 INFO L78 Accepts]: Start accepts. Automaton has 10276 states and 44335 transitions. Word has length 17 [2022-11-26 00:48:18,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:48:18,161 INFO L495 AbstractCegarLoop]: Abstraction has 10276 states and 44335 transitions. [2022-11-26 00:48:18,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 48 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:48:18,162 INFO L276 IsEmpty]: Start isEmpty. Operand 10276 states and 44335 transitions. [2022-11-26 00:48:18,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 00:48:18,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:48:18,173 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:48:18,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-11-26 00:48:18,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-26 00:48:18,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2022-11-26 00:48:18,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:48:18,783 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:48:18,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:48:18,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1551224033, now seen corresponding path program 3 times [2022-11-26 00:48:18,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:48:18,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [337271904] [2022-11-26 00:48:18,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:48:18,784 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:48:18,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:48:18,785 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:48:18,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-26 00:48:19,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-26 00:48:19,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:48:19,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-26 00:48:19,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:48:19,376 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:48:19,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:48:19,666 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 [2022-11-26 00:48:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:20,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:48:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:22,149 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:48:22,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [337271904] [2022-11-26 00:48:22,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [337271904] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:48:22,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2028444491] [2022-11-26 00:48:22,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:48:22,150 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:48:22,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:48:22,151 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:48:22,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-26 00:48:23,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-26 00:48:23,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:48:23,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-26 00:48:23,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:48:23,566 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:48:23,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:48:24,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-26 00:48:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:24,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:48:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:28,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2028444491] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:48:28,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402639044] [2022-11-26 00:48:28,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:48:28,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:48:28,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:48:28,261 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:48:28,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-26 00:48:28,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-26 00:48:28,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:48:28,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 00:48:28,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:48:29,591 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:29,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:48:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:48:30,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402639044] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:48:30,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:48:30,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12, 12, 13, 13] total 51 [2022-11-26 00:48:30,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840653446] [2022-11-26 00:48:30,878 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:48:30,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-26 00:48:30,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:48:30,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-26 00:48:30,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=2416, Unknown=0, NotChecked=0, Total=2756 [2022-11-26 00:48:30,880 INFO L87 Difference]: Start difference. First operand 10276 states and 44335 transitions. Second operand has 53 states, 52 states have (on average 1.5384615384615385) internal successors, (80), 52 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:49:08,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:49:08,278 INFO L93 Difference]: Finished difference Result 12142 states and 48591 transitions. [2022-11-26 00:49:08,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-26 00:49:08,279 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.5384615384615385) internal successors, (80), 52 states have internal predecessors, (80), 0 states have call successors, (0), 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 19 [2022-11-26 00:49:08,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:49:08,310 INFO L225 Difference]: With dead ends: 12142 [2022-11-26 00:49:08,310 INFO L226 Difference]: Without dead ends: 12142 [2022-11-26 00:49:08,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=1843, Invalid=8257, Unknown=0, NotChecked=0, Total=10100 [2022-11-26 00:49:08,311 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 3084 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 9832 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3084 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 9914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 9832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:49:08,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3084 Valid, 741 Invalid, 9914 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [82 Valid, 9832 Invalid, 0 Unknown, 0 Unchecked, 24.3s Time] [2022-11-26 00:49:08,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12142 states. [2022-11-26 00:49:08,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12142 to 10304. [2022-11-26 00:49:08,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10304 states, 10295 states have (on average 4.282370082564352) internal successors, (44087), 10303 states have internal predecessors, (44087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:49:08,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10304 states to 10304 states and 44087 transitions. [2022-11-26 00:49:08,556 INFO L78 Accepts]: Start accepts. Automaton has 10304 states and 44087 transitions. Word has length 19 [2022-11-26 00:49:08,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:49:08,557 INFO L495 AbstractCegarLoop]: Abstraction has 10304 states and 44087 transitions. [2022-11-26 00:49:08,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.5384615384615385) internal successors, (80), 52 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:49:08,557 INFO L276 IsEmpty]: Start isEmpty. Operand 10304 states and 44087 transitions. [2022-11-26 00:49:08,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-26 00:49:08,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:49:08,566 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:49:08,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-11-26 00:49:08,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-11-26 00:49:08,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2022-11-26 00:49:09,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:49:09,176 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-26 00:49:09,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:49:09,177 INFO L85 PathProgramCache]: Analyzing trace with hash 456409347, now seen corresponding path program 5 times [2022-11-26 00:49:09,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:49:09,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238117487] [2022-11-26 00:49:09,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-26 00:49:09,177 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:49:09,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:49:09,178 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-26 00:49:09,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-26 00:49:09,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-26 00:49:09,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:49:09,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-26 00:49:09,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:49:09,619 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:49:09,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:49:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:49:11,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:49:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:49:20,425 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:49:20,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238117487] [2022-11-26 00:49:20,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238117487] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:49:20,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1907049275] [2022-11-26 00:49:20,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-26 00:49:20,426 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:49:20,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:49:20,427 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:49:20,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-26 00:49:21,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-26 00:49:21,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:49:21,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-26 00:49:21,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:49:21,246 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:49:21,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:49:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:49:22,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:49:34,611 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:49:34,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1907049275] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:49:34,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327333008] [2022-11-26 00:49:34,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-26 00:49:34,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:49:34,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:49:34,612 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:49:34,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2782ae2-c2f2-4aba-a3b6-0bfa917cad1f/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-26 00:49:35,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-26 00:49:35,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:49:35,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-26 00:49:35,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:49:35,273 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:49:35,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:49:35,981 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:49:35,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:49:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:49:52,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327333008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:49:52,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:49:52,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 53 [2022-11-26 00:49:52,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907943225] [2022-11-26 00:49:52,775 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:49:52,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-26 00:49:52,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:49:52,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-26 00:49:52,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=2546, Unknown=0, NotChecked=0, Total=2970 [2022-11-26 00:49:52,776 INFO L87 Difference]: Start difference. First operand 10304 states and 44087 transitions. Second operand has 55 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 54 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:51:20,685 WARN L233 SmtUtils]: Spent 5.71s on a formula simplification. DAG size of input: 131 DAG size of output: 99 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:51:44,460 WARN L233 SmtUtils]: Spent 7.47s on a formula simplification. DAG size of input: 141 DAG size of output: 109 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:51:51,847 WARN L233 SmtUtils]: Spent 5.93s on a formula simplification. DAG size of input: 136 DAG size of output: 105 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)