./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-min-max-1.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_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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_5670a0ce-52d7-4032-b279-02953fe2e01e/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 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 --- 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 00:03:57,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:03:57,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:03:57,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:03:57,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:03:57,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:03:57,688 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:03:57,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:03:57,693 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:03:57,694 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:03:57,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:03:57,697 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:03:57,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:03:57,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:03:57,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:03:57,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:03:57,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:03:57,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:03:57,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:03:57,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:03:57,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:03:57,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:03:57,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:03:57,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:03:57,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:03:57,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:03:57,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:03:57,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:03:57,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:03:57,724 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:03:57,724 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:03:57,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:03:57,726 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:03:57,728 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:03:57,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:03:57,730 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:03:57,731 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:03:57,731 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:03:57,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:03:57,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:03:57,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:03:57,736 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-26 00:03:57,765 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:03:57,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:03:57,767 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:03:57,767 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:03:57,768 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:03:57,768 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:03:57,769 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:03:57,769 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:03:57,769 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:03:57,770 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:03:57,770 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:03:57,770 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:03:57,771 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:03:57,771 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:03:57,772 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:03:57,772 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:03:57,772 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:03:57,773 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:03:57,774 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 00:03:57,774 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 00:03:57,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:03:57,775 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:03:57,775 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:03:57,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:03:57,776 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:03:57,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:03:57,777 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 00:03:57,777 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 00:03:57,777 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 00:03:57,778 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:03:57,778 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:03:57,778 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:03:57,779 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:03:57,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:03:57,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:03:57,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:03:57,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:03:57,780 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:03:57,781 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:03:57,781 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:03:57,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:03:57,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:03:57,782 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_5670a0ce-52d7-4032-b279-02953fe2e01e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 [2022-11-26 00:03:58,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:03:58,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:03:58,197 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:03:58,199 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:03:58,200 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:03:58,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2022-11-26 00:04:02,041 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:04:02,310 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:04:02,311 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2022-11-26 00:04:02,320 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/data/8d54f2bb8/acb1c9cc95b5426abe6bc31a5c646a6c/FLAG804d796d9 [2022-11-26 00:04:02,340 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/data/8d54f2bb8/acb1c9cc95b5426abe6bc31a5c646a6c [2022-11-26 00:04:02,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:04:02,345 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:04:02,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:04:02,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:04:02,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:04:02,359 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:04:02" (1/1) ... [2022-11-26 00:04:02,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8d2c9ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:02, skipping insertion in model container [2022-11-26 00:04:02,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:04:02" (1/1) ... [2022-11-26 00:04:02,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:04:02,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:04:02,682 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:02,684 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:02,685 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:02,687 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:02,692 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:02,696 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:02,701 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:02,702 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:02,702 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:02,703 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:02,705 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:02,707 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:02,708 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:02,720 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:02,733 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_5670a0ce-52d7-4032-b279-02953fe2e01e/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c[3057,3070] [2022-11-26 00:04:02,766 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:04:02,788 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 00:04:02,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@406fd32a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:02, skipping insertion in model container [2022-11-26 00:04:02,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:04:02,791 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-26 00:04:02,794 INFO L158 Benchmark]: Toolchain (without parser) took 447.20ms. Allocated memory is still 178.3MB. Free memory was 138.2MB in the beginning and 127.1MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-26 00:04:02,795 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 140.5MB. Free memory is still 83.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:04:02,796 INFO L158 Benchmark]: CACSL2BoogieTranslator took 444.09ms. Allocated memory is still 178.3MB. Free memory was 137.6MB in the beginning and 127.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:04:02,801 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 140.5MB. Free memory is still 83.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 444.09ms. Allocated memory is still 178.3MB. Free memory was 137.6MB in the beginning and 127.1MB 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: 124]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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_5670a0ce-52d7-4032-b279-02953fe2e01e/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 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 --- 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 00:04:05,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:04:05,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:04:05,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:04:05,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:04:05,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:04:05,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:04:05,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:04:05,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:04:05,821 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:04:05,823 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:04:05,826 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:04:05,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:04:05,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:04:05,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:04:05,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:04:05,843 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:04:05,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:04:05,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:04:05,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:04:05,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:04:05,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:04:05,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:04:05,862 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:04:05,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:04:05,875 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:04:05,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:04:05,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:04:05,879 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:04:05,881 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:04:05,882 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:04:05,883 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:04:05,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:04:05,887 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:04:05,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:04:05,888 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:04:05,889 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:04:05,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:04:05,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:04:05,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:04:05,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:04:05,899 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-26 00:04:05,973 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:04:05,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:04:05,974 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:04:05,974 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:04:05,975 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:04:05,975 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:04:05,975 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:04:05,976 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:04:05,976 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:04:05,976 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:04:05,976 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:04:05,976 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:04:05,977 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-26 00:04:05,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-26 00:04:05,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:04:05,978 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:04:05,978 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:04:05,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:04:05,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:04:05,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:04:05,979 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-26 00:04:05,979 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-26 00:04:05,980 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-26 00:04:05,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:04:05,980 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-26 00:04:05,980 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-26 00:04:05,981 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-26 00:04:05,981 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:04:05,981 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:04:05,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:04:05,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-26 00:04:05,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:04:05,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:04:05,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:04:05,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:04:05,985 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-26 00:04:05,986 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-26 00:04:05,987 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:04:05,987 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-26 00:04:05,987 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_5670a0ce-52d7-4032-b279-02953fe2e01e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e7e1d85f63f5db62c0766d87dec12398108cf8053838b2df867ce8148d55e54 [2022-11-26 00:04:06,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:04:06,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:04:06,527 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:04:06,529 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:04:06,531 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:04:06,533 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2022-11-26 00:04:10,389 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:04:10,662 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:04:10,663 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2022-11-26 00:04:10,673 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/data/865d5d8d6/12567058b73c40598cdcd38d7ac4566e/FLAG264774363 [2022-11-26 00:04:10,712 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/data/865d5d8d6/12567058b73c40598cdcd38d7ac4566e [2022-11-26 00:04:10,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:04:10,718 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:04:10,723 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:04:10,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:04:10,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:04:10,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:04:10" (1/1) ... [2022-11-26 00:04:10,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79d0bcf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:10, skipping insertion in model container [2022-11-26 00:04:10,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:04:10" (1/1) ... [2022-11-26 00:04:10,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:04:10,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:04:11,108 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:11,111 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:11,112 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:11,114 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:11,118 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:11,123 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:11,129 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:11,130 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:11,130 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:11,131 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:11,133 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:11,136 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:11,141 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:11,151 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:11,168 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_5670a0ce-52d7-4032-b279-02953fe2e01e/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c[3057,3070] [2022-11-26 00:04:11,196 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:04:11,220 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-26 00:04:11,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:04:11,241 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:11,242 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:11,242 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:11,242 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:11,243 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:11,245 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:11,246 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:11,247 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:11,247 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:11,247 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:11,248 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:11,250 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:11,251 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:11,251 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:11,257 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_5670a0ce-52d7-4032-b279-02953fe2e01e/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c[3057,3070] [2022-11-26 00:04:11,268 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:04:11,279 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:04:11,307 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:11,308 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:11,308 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:11,309 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:11,312 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:11,314 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:11,324 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:11,325 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:11,326 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:11,327 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:11,328 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:11,330 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:11,332 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-26 00:04:11,341 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-26 00:04:11,348 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_5670a0ce-52d7-4032-b279-02953fe2e01e/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c[3057,3070] [2022-11-26 00:04:11,352 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:04:11,375 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:04:11,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:11 WrapperNode [2022-11-26 00:04:11,376 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:04:11,377 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:04:11,377 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:04:11,377 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:04:11,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:11" (1/1) ... [2022-11-26 00:04:11,400 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:11" (1/1) ... [2022-11-26 00:04:11,427 INFO L138 Inliner]: procedures = 27, calls = 53, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 118 [2022-11-26 00:04:11,428 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:04:11,429 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:04:11,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:04:11,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:04:11,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:11" (1/1) ... [2022-11-26 00:04:11,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:11" (1/1) ... [2022-11-26 00:04:11,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:11" (1/1) ... [2022-11-26 00:04:11,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:11" (1/1) ... [2022-11-26 00:04:11,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:11" (1/1) ... [2022-11-26 00:04:11,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:11" (1/1) ... [2022-11-26 00:04:11,481 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:11" (1/1) ... [2022-11-26 00:04:11,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:11" (1/1) ... [2022-11-26 00:04:11,486 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:04:11,487 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:04:11,487 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:04:11,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:04:11,489 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:11" (1/1) ... [2022-11-26 00:04:11,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:04:11,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:04:11,527 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:04:11,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:04:11,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:04:11,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-26 00:04:11,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-26 00:04:11,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-26 00:04:11,599 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-26 00:04:11,600 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-26 00:04:11,600 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-26 00:04:11,601 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-26 00:04:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-26 00:04:11,601 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-26 00:04:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-26 00:04:11,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-26 00:04:11,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-26 00:04:11,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:04:11,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:04:11,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-26 00:04:11,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-26 00:04:11,604 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 00:04:11,782 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:04:11,784 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:04:12,615 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:04:12,782 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:04:12,782 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-26 00:04:12,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:04:12 BoogieIcfgContainer [2022-11-26 00:04:12,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:04:12,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:04:12,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:04:12,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:04:12,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:04:10" (1/3) ... [2022-11-26 00:04:12,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6835c982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:04:12, skipping insertion in model container [2022-11-26 00:04:12,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:04:11" (2/3) ... [2022-11-26 00:04:12,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6835c982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:04:12, skipping insertion in model container [2022-11-26 00:04:12,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:04:12" (3/3) ... [2022-11-26 00:04:12,798 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-min-max-1.wvr.c [2022-11-26 00:04:12,821 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:04:12,823 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-11-26 00:04:12,823 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-26 00:04:13,028 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-26 00:04:13,097 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-26 00:04:13,129 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 204 transitions, 432 flow [2022-11-26 00:04:13,132 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 204 transitions, 432 flow [2022-11-26 00:04:13,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 204 transitions, 432 flow [2022-11-26 00:04:13,303 INFO L130 PetriNetUnfolder]: 12/201 cut-off events. [2022-11-26 00:04:13,303 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-26 00:04:13,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 201 events. 12/201 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 221 event pairs, 0 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 161. Up to 2 conditions per place. [2022-11-26 00:04:13,317 INFO L119 LiptonReduction]: Number of co-enabled transitions 2358 [2022-11-26 00:04:55,880 INFO L134 LiptonReduction]: Checked pairs total: 4497 [2022-11-26 00:04:55,881 INFO L136 LiptonReduction]: Total number of compositions: 221 [2022-11-26 00:04:55,892 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 64 places, 57 transitions, 138 flow [2022-11-26 00:04:56,018 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1340 states, 1058 states have (on average 3.879962192816635) internal successors, (4105), 1339 states have internal predecessors, (4105), 0 states have call successors, (0), 0 states 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 00:04:56,041 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:04:56,049 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;@7d9ecb24, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:04:56,050 INFO L358 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2022-11-26 00:04:56,056 INFO L276 IsEmpty]: Start isEmpty. Operand has 1340 states, 1058 states have (on average 3.879962192816635) internal successors, (4105), 1339 states have internal predecessors, (4105), 0 states have call successors, (0), 0 states 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 00:04:56,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 00:04:56,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:56,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 00:04:56,065 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:04:56,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:56,071 INFO L85 PathProgramCache]: Analyzing trace with hash 26017, now seen corresponding path program 1 times [2022-11-26 00:04:56,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:04:56,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [861660042] [2022-11-26 00:04:56,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:56,095 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 00:04:56,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:04:56,115 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:04:56,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:04:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:56,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:04:56,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:56,690 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:04:56,691 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 00:04:56,751 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 00:04:56,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:04:56,753 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:04:56,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [861660042] [2022-11-26 00:04:56,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [861660042] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:04:56,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:04:56,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:04:56,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243201202] [2022-11-26 00:04:56,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:04:56,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:04:56,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:04:56,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:04:56,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:04:56,799 INFO L87 Difference]: Start difference. First operand has 1340 states, 1058 states have (on average 3.879962192816635) internal successors, (4105), 1339 states have internal predecessors, (4105), 0 states have call successors, (0), 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 00:04:57,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:04:57,179 INFO L93 Difference]: Finished difference Result 882 states and 2679 transitions. [2022-11-26 00:04:57,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:04:57,182 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 00:04:57,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:04:57,208 INFO L225 Difference]: With dead ends: 882 [2022-11-26 00:04:57,209 INFO L226 Difference]: Without dead ends: 882 [2022-11-26 00:04:57,210 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 00:04:57,214 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:04:57,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 2 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:04:57,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-11-26 00:04:57,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 882. [2022-11-26 00:04:57,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 730 states have (on average 3.66986301369863) internal successors, (2679), 881 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states 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 00:04:57,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2679 transitions. [2022-11-26 00:04:57,345 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2679 transitions. Word has length 2 [2022-11-26 00:04:57,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:04:57,346 INFO L495 AbstractCegarLoop]: Abstraction has 882 states and 2679 transitions. [2022-11-26 00:04:57,346 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 00:04:57,347 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2679 transitions. [2022-11-26 00:04:57,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 00:04:57,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:57,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 00:04:57,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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)] Ended with exit code 0 [2022-11-26 00:04:57,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:04:57,563 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:04:57,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:57,563 INFO L85 PathProgramCache]: Analyzing trace with hash 26018, now seen corresponding path program 1 times [2022-11-26 00:04:57,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:04:57,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612541557] [2022-11-26 00:04:57,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:57,564 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 00:04:57,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:04:57,569 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:04:57,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:04:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:57,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:04:57,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:57,849 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-26 00:04:57,849 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 00:04:57,871 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 00:04:57,872 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:04:57,872 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:04:57,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612541557] [2022-11-26 00:04:57,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612541557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:04:57,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:04:57,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:04:57,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748754263] [2022-11-26 00:04:57,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:04:57,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:04:57,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:04:57,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:04:57,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:04:57,877 INFO L87 Difference]: Start difference. First operand 882 states and 2679 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 00:04:58,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:04:58,163 INFO L93 Difference]: Finished difference Result 880 states and 2677 transitions. [2022-11-26 00:04:58,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:04:58,164 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 00:04:58,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:04:58,177 INFO L225 Difference]: With dead ends: 880 [2022-11-26 00:04:58,181 INFO L226 Difference]: Without dead ends: 880 [2022-11-26 00:04:58,181 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 00:04:58,183 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:04:58,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 2 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:04:58,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-11-26 00:04:58,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 880. [2022-11-26 00:04:58,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 730 states have (on average 3.6671232876712327) internal successors, (2677), 879 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states 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 00:04:58,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 2677 transitions. [2022-11-26 00:04:58,276 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 2677 transitions. Word has length 2 [2022-11-26 00:04:58,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:04:58,277 INFO L495 AbstractCegarLoop]: Abstraction has 880 states and 2677 transitions. [2022-11-26 00:04:58,277 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 00:04:58,278 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 2677 transitions. [2022-11-26 00:04:58,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 00:04:58,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:58,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 00:04:58,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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)] Ended with exit code 0 [2022-11-26 00:04:58,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:04:58,493 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:04:58,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:58,494 INFO L85 PathProgramCache]: Analyzing trace with hash 25880, now seen corresponding path program 1 times [2022-11-26 00:04:58,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:04:58,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71602986] [2022-11-26 00:04:58,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:58,495 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 00:04:58,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:04:58,497 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:04:58,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:04:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:58,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:04:58,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:58,795 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:04:58,796 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 00:04:58,860 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 00:04:58,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:04:58,860 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:04:58,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71602986] [2022-11-26 00:04:58,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71602986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:04:58,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:04:58,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:04:58,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017279532] [2022-11-26 00:04:58,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:04:58,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:04:58,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:04:58,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:04:58,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:04:58,863 INFO L87 Difference]: Start difference. First operand 880 states and 2677 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 00:04:59,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:04:59,481 INFO L93 Difference]: Finished difference Result 1758 states and 5352 transitions. [2022-11-26 00:04:59,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:04:59,482 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 00:04:59,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:04:59,497 INFO L225 Difference]: With dead ends: 1758 [2022-11-26 00:04:59,497 INFO L226 Difference]: Without dead ends: 1758 [2022-11-26 00:04:59,497 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 00:04:59,499 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 42 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:04:59,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 4 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:04:59,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2022-11-26 00:04:59,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 881. [2022-11-26 00:04:59,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 731 states have (on average 3.667578659370725) internal successors, (2681), 880 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states 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 00:04:59,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 2681 transitions. [2022-11-26 00:04:59,556 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 2681 transitions. Word has length 2 [2022-11-26 00:04:59,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:04:59,557 INFO L495 AbstractCegarLoop]: Abstraction has 881 states and 2681 transitions. [2022-11-26 00:04:59,557 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 00:04:59,557 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 2681 transitions. [2022-11-26 00:04:59,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-26 00:04:59,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:04:59,558 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-26 00:04:59,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:04:59,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:04:59,772 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:04:59,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:04:59,772 INFO L85 PathProgramCache]: Analyzing trace with hash 26043, now seen corresponding path program 1 times [2022-11-26 00:04:59,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:04:59,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279262762] [2022-11-26 00:04:59,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:04:59,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:04:59,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:04:59,775 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:04:59,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:04:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:04:59,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:04:59,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:04:59,926 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 00:04:59,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:04:59,927 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:04:59,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279262762] [2022-11-26 00:04:59,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279262762] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:04:59,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:04:59,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:04:59,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365133621] [2022-11-26 00:04:59,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:04:59,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:04:59,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:04:59,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:04:59,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:04:59,930 INFO L87 Difference]: Start difference. First operand 881 states and 2681 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 00:05:00,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:00,271 INFO L93 Difference]: Finished difference Result 881 states and 2678 transitions. [2022-11-26 00:05:00,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:05:00,272 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 00:05:00,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:00,279 INFO L225 Difference]: With dead ends: 881 [2022-11-26 00:05:00,280 INFO L226 Difference]: Without dead ends: 881 [2022-11-26 00:05:00,280 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 00:05:00,282 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:00,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:05:00,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-11-26 00:05:00,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 881. [2022-11-26 00:05:00,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 731 states have (on average 3.6634746922024624) internal successors, (2678), 880 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states 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 00:05:00,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 2678 transitions. [2022-11-26 00:05:00,321 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 2678 transitions. Word has length 2 [2022-11-26 00:05:00,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:00,322 INFO L495 AbstractCegarLoop]: Abstraction has 881 states and 2678 transitions. [2022-11-26 00:05:00,322 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 00:05:00,322 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 2678 transitions. [2022-11-26 00:05:00,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 00:05:00,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:00,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 00:05:00,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:00,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:00,546 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:05:00,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:00,548 INFO L85 PathProgramCache]: Analyzing trace with hash 806677, now seen corresponding path program 1 times [2022-11-26 00:05:00,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:05:00,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112047525] [2022-11-26 00:05:00,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:00,549 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 00:05:00,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:05:00,555 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:00,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:00,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:00,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:05:00,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:00,849 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:05:00,849 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 00:05:00,966 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 00:05:00,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:01,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:05:01,321 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:05:01,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112047525] [2022-11-26 00:05:01,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112047525] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:01,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1814149044] [2022-11-26 00:05:01,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:01,322 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:05:01,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:05:01,342 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:05:01,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-26 00:05:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:01,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-26 00:05:01,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:01,721 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:05:01,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:05:01,807 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 00:05:01,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:01,913 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 00:05:01,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1814149044] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:01,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397622186] [2022-11-26 00:05:01,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:01,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:01,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:01,922 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:05:01,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:05:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:02,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:05:02,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:02,232 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:05:02,232 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 00:05:02,299 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 00:05:02,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:02,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:05:02,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397622186] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:02,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:05:02,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 7 [2022-11-26 00:05:02,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461464854] [2022-11-26 00:05:02,501 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:05:02,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:05:02,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:05:02,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:05:02,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:05:02,503 INFO L87 Difference]: Start difference. First operand 881 states and 2678 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 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 00:05:04,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:04,188 INFO L93 Difference]: Finished difference Result 1761 states and 5361 transitions. [2022-11-26 00:05:04,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:05:04,197 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 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 3 [2022-11-26 00:05:04,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:04,212 INFO L225 Difference]: With dead ends: 1761 [2022-11-26 00:05:04,212 INFO L226 Difference]: Without dead ends: 1761 [2022-11-26 00:05:04,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:05:04,216 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 213 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:04,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 8 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-26 00:05:04,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2022-11-26 00:05:04,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 884. [2022-11-26 00:05:04,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 734 states have (on average 3.664850136239782) internal successors, (2690), 883 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states 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 00:05:04,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2690 transitions. [2022-11-26 00:05:04,274 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2690 transitions. Word has length 3 [2022-11-26 00:05:04,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:04,274 INFO L495 AbstractCegarLoop]: Abstraction has 884 states and 2690 transitions. [2022-11-26 00:05:04,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 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 00:05:04,275 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2690 transitions. [2022-11-26 00:05:04,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 00:05:04,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:04,276 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 00:05:04,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:04,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:04,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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)] Ended with exit code 0 [2022-11-26 00:05:04,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:04,885 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:05:04,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:04,885 INFO L85 PathProgramCache]: Analyzing trace with hash 806840, now seen corresponding path program 1 times [2022-11-26 00:05:04,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:05:04,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [459555173] [2022-11-26 00:05:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:04,886 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 00:05:04,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:05:04,887 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:04,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:05,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:05,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:05:05,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:05,163 INFO L321 Elim1Store]: treesize reduction 115, result has 16.1 percent of original size [2022-11-26 00:05:05,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 47 [2022-11-26 00:05:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:05:05,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:05:05,279 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:05:05,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [459555173] [2022-11-26 00:05:05,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [459555173] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:05,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:05,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:05:05,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082877073] [2022-11-26 00:05:05,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:05,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:05:05,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:05:05,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:05:05,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:05,282 INFO L87 Difference]: Start difference. First operand 884 states and 2690 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:05,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:05,640 INFO L93 Difference]: Finished difference Result 755 states and 2238 transitions. [2022-11-26 00:05:05,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:05:05,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-26 00:05:05,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:05,646 INFO L225 Difference]: With dead ends: 755 [2022-11-26 00:05:05,647 INFO L226 Difference]: Without dead ends: 755 [2022-11-26 00:05:05,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:05,650 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 2 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 00:05:05,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 2 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:05:05,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-11-26 00:05:05,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 755. [2022-11-26 00:05:05,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 631 states have (on average 3.5467511885895404) internal successors, (2238), 754 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states 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 00:05:05,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2238 transitions. [2022-11-26 00:05:05,682 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2238 transitions. Word has length 3 [2022-11-26 00:05:05,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:05,683 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 2238 transitions. [2022-11-26 00:05:05,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:05,683 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2238 transitions. [2022-11-26 00:05:05,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-26 00:05:05,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:05,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-26 00:05:05,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:05,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:05,898 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:05:05,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:05,899 INFO L85 PathProgramCache]: Analyzing trace with hash 806842, now seen corresponding path program 1 times [2022-11-26 00:05:05,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:05:05,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105142250] [2022-11-26 00:05:05,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:05,899 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 00:05:05,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:05:05,902 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:05,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:06,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:05:06,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:06,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:06,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:06,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:06,223 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2022-11-26 00:05:06,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 35 [2022-11-26 00:05:06,254 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-26 00:05:06,254 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 00:05:06,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:05:06,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:05:06,406 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:05:06,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [105142250] [2022-11-26 00:05:06,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [105142250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:06,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:06,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:05:06,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232948960] [2022-11-26 00:05:06,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:06,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:05:06,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:05:06,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:05:06,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:06,408 INFO L87 Difference]: Start difference. First operand 755 states and 2238 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:06,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:06,675 INFO L93 Difference]: Finished difference Result 626 states and 1786 transitions. [2022-11-26 00:05:06,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:05:06,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-26 00:05:06,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:06,681 INFO L225 Difference]: With dead ends: 626 [2022-11-26 00:05:06,681 INFO L226 Difference]: Without dead ends: 626 [2022-11-26 00:05:06,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:06,682 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 2 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 00:05:06,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 2 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:05:06,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2022-11-26 00:05:06,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2022-11-26 00:05:06,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 528 states have (on average 3.382575757575758) internal successors, (1786), 625 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states 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 00:05:06,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1786 transitions. [2022-11-26 00:05:06,717 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1786 transitions. Word has length 3 [2022-11-26 00:05:06,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:06,717 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 1786 transitions. [2022-11-26 00:05:06,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:06,718 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1786 transitions. [2022-11-26 00:05:06,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:05:06,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:06,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:05:06,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:06,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:06,939 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:05:06,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:06,939 INFO L85 PathProgramCache]: Analyzing trace with hash 775392015, now seen corresponding path program 1 times [2022-11-26 00:05:06,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:05:06,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [744486475] [2022-11-26 00:05:06,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:06,940 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 00:05:06,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:05:06,941 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:06,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:07,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:07,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:05:07,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:07,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:05:07,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:05:07,069 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:05:07,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [744486475] [2022-11-26 00:05:07,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [744486475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:07,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:07,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:05:07,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177245824] [2022-11-26 00:05:07,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:07,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:05:07,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:05:07,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:05:07,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:07,071 INFO L87 Difference]: Start difference. First operand 626 states and 1786 transitions. Second operand has 3 states, 2 states have (on average 2.5) 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 00:05:07,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:07,310 INFO L93 Difference]: Finished difference Result 378 states and 1058 transitions. [2022-11-26 00:05:07,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:05:07,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) 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 00:05:07,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:07,313 INFO L225 Difference]: With dead ends: 378 [2022-11-26 00:05:07,313 INFO L226 Difference]: Without dead ends: 378 [2022-11-26 00:05:07,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:07,315 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:07,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 0 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:05:07,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-11-26 00:05:07,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 378. [2022-11-26 00:05:07,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 336 states have (on average 3.1488095238095237) internal successors, (1058), 377 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states 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 00:05:07,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 1058 transitions. [2022-11-26 00:05:07,329 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 1058 transitions. Word has length 5 [2022-11-26 00:05:07,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:07,330 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 1058 transitions. [2022-11-26 00:05:07,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) 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 00:05:07,330 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 1058 transitions. [2022-11-26 00:05:07,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:05:07,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:07,331 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:05:07,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:07,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:07,546 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:05:07,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:07,546 INFO L85 PathProgramCache]: Analyzing trace with hash 775392016, now seen corresponding path program 1 times [2022-11-26 00:05:07,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:05:07,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503443306] [2022-11-26 00:05:07,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:07,547 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 00:05:07,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:05:07,548 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:07,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:07,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:05:07,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:05:07,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:05:07,720 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:05:07,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503443306] [2022-11-26 00:05:07,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503443306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:07,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:07,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:05:07,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541817875] [2022-11-26 00:05:07,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:07,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:05:07,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:05:07,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:05:07,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:07,723 INFO L87 Difference]: Start difference. First operand 378 states and 1058 transitions. Second operand has 3 states, 2 states have (on average 2.5) 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 00:05:08,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:08,016 INFO L93 Difference]: Finished difference Result 278 states and 766 transitions. [2022-11-26 00:05:08,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:05:08,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) 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 00:05:08,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:08,019 INFO L225 Difference]: With dead ends: 278 [2022-11-26 00:05:08,019 INFO L226 Difference]: Without dead ends: 278 [2022-11-26 00:05:08,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:08,020 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:08,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 0 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:05:08,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-11-26 00:05:08,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2022-11-26 00:05:08,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 255 states have (on average 3.003921568627451) internal successors, (766), 277 states have internal predecessors, (766), 0 states have call successors, (0), 0 states 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 00:05:08,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 766 transitions. [2022-11-26 00:05:08,032 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 766 transitions. Word has length 5 [2022-11-26 00:05:08,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:08,032 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 766 transitions. [2022-11-26 00:05:08,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) 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 00:05:08,033 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 766 transitions. [2022-11-26 00:05:08,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:05:08,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:08,034 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:05:08,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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)] Ended with exit code 0 [2022-11-26 00:05:08,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:08,248 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:05:08,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:08,249 INFO L85 PathProgramCache]: Analyzing trace with hash 775392215, now seen corresponding path program 1 times [2022-11-26 00:05:08,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:05:08,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106604985] [2022-11-26 00:05:08,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:08,250 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 00:05:08,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:05:08,251 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:08,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:08,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:05:08,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:08,509 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-26 00:05:08,509 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 00:05:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:05:08,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:05:08,668 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:05:08,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106604985] [2022-11-26 00:05:08,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106604985] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:08,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:08,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:05:08,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177407338] [2022-11-26 00:05:08,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:08,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:05:08,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:05:08,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:05:08,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:08,671 INFO L87 Difference]: Start difference. First operand 278 states and 766 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:08,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:08,879 INFO L93 Difference]: Finished difference Result 263 states and 731 transitions. [2022-11-26 00:05:08,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:05:08,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-26 00:05:08,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:08,882 INFO L225 Difference]: With dead ends: 263 [2022-11-26 00:05:08,882 INFO L226 Difference]: Without dead ends: 263 [2022-11-26 00:05:08,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:08,883 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:08,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 0 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:05:08,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-26 00:05:08,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-11-26 00:05:08,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 244 states have (on average 2.9959016393442623) internal successors, (731), 262 states have internal predecessors, (731), 0 states have call successors, (0), 0 states 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 00:05:08,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 731 transitions. [2022-11-26 00:05:08,894 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 731 transitions. Word has length 5 [2022-11-26 00:05:08,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:08,894 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 731 transitions. [2022-11-26 00:05:08,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:08,895 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 731 transitions. [2022-11-26 00:05:08,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-26 00:05:08,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:08,896 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-26 00:05:08,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:09,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:09,111 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:05:09,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:09,111 INFO L85 PathProgramCache]: Analyzing trace with hash 775392216, now seen corresponding path program 1 times [2022-11-26 00:05:09,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:05:09,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428898421] [2022-11-26 00:05:09,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:09,112 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 00:05:09,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:05:09,113 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:09,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-26 00:05:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:09,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:05:09,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:09,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:09,473 INFO L321 Elim1Store]: treesize reduction 65, result has 34.3 percent of original size [2022-11-26 00:05:09,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 41 [2022-11-26 00:05:09,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-26 00:05:09,792 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 00:05:09,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:10,096 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 00:05:10,097 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:05:10,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428898421] [2022-11-26 00:05:10,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428898421] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:10,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [664549219] [2022-11-26 00:05:10,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:10,098 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:05:10,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:05:10,099 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:05:10,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-26 00:05:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:10,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:05:10,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:10,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:10,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:10,489 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-26 00:05:10,490 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 00:05:10,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-26 00:05:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:05:10,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:05:10,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [664549219] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:10,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:05:10,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-26 00:05:10,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702834967] [2022-11-26 00:05:10,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:10,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:05:10,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:05:10,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:05:10,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:05:10,656 INFO L87 Difference]: Start difference. First operand 263 states and 731 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:10,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:10,873 INFO L93 Difference]: Finished difference Result 248 states and 696 transitions. [2022-11-26 00:05:10,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:05:10,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-26 00:05:10,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:10,876 INFO L225 Difference]: With dead ends: 248 [2022-11-26 00:05:10,876 INFO L226 Difference]: Without dead ends: 248 [2022-11-26 00:05:10,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:05:10,877 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:10,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 0 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:05:10,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-26 00:05:10,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2022-11-26 00:05:10,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 233 states have (on average 2.9871244635193133) internal successors, (696), 247 states have internal predecessors, (696), 0 states have call successors, (0), 0 states 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 00:05:10,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 696 transitions. [2022-11-26 00:05:10,887 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 696 transitions. Word has length 5 [2022-11-26 00:05:10,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:10,887 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 696 transitions. [2022-11-26 00:05:10,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:10,888 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 696 transitions. [2022-11-26 00:05:10,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:05:10,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:10,889 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-26 00:05:10,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:11,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-11-26 00:05:11,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:11,292 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:05:11,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:11,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1733723048, now seen corresponding path program 2 times [2022-11-26 00:05:11,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:05:11,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1202638070] [2022-11-26 00:05:11,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:05:11,294 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 00:05:11,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:05:11,295 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:11,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:11,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:05:11,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:05:11,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:05:11,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:11,630 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:05:11,630 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 00:05:11,888 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 00:05:11,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:12,854 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 00:05:12,855 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:05:12,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1202638070] [2022-11-26 00:05:12,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1202638070] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:12,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1045416394] [2022-11-26 00:05:12,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:05:12,856 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:05:12,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:05:12,857 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:05:12,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-11-26 00:05:13,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:05:13,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:05:13,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:05:13,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:13,357 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:05:13,357 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 00:05:13,528 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 00:05:13,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:14,640 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 00:05:14,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1045416394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:14,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397796545] [2022-11-26 00:05:14,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:05:14,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:14,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:14,644 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:05:14,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-26 00:05:14,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:05:14,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:05:14,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:05:14,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:15,004 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:05:15,004 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 00:05:15,311 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 00:05:15,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:15,554 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 00:05:15,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397796545] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:15,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:05:15,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 19 [2022-11-26 00:05:15,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845918628] [2022-11-26 00:05:15,555 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:05:15,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-26 00:05:15,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:05:15,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-26 00:05:15,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:05:15,557 INFO L87 Difference]: Start difference. First operand 248 states and 696 transitions. Second operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:22,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:22,397 INFO L93 Difference]: Finished difference Result 1941 states and 5503 transitions. [2022-11-26 00:05:22,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:05:22,399 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 00:05:22,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:22,412 INFO L225 Difference]: With dead ends: 1941 [2022-11-26 00:05:22,413 INFO L226 Difference]: Without dead ends: 1941 [2022-11-26 00:05:22,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=216, Invalid=384, Unknown=0, NotChecked=0, Total=600 [2022-11-26 00:05:22,414 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 813 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 813 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:22,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [813 Valid, 0 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-26 00:05:22,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1941 states. [2022-11-26 00:05:22,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1941 to 254. [2022-11-26 00:05:22,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 239 states have (on average 2.9623430962343096) internal successors, (708), 253 states have internal predecessors, (708), 0 states have call successors, (0), 0 states 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 00:05:22,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 708 transitions. [2022-11-26 00:05:22,452 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 708 transitions. Word has length 6 [2022-11-26 00:05:22,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:22,453 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 708 transitions. [2022-11-26 00:05:22,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:22,453 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 708 transitions. [2022-11-26 00:05:22,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:05:22,454 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:22,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:22,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:22,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:22,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:23,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:23,064 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:05:23,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:23,064 INFO L85 PathProgramCache]: Analyzing trace with hash 2122406458, now seen corresponding path program 1 times [2022-11-26 00:05:23,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:05:23,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638742989] [2022-11-26 00:05:23,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:23,065 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-26 00:05:23,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:05:23,066 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:23,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:23,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:05:23,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:05:23,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:05:23,281 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:05:23,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638742989] [2022-11-26 00:05:23,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638742989] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:23,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:23,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:05:23,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491065377] [2022-11-26 00:05:23,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:23,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:05:23,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:05:23,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:05:23,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:05:23,284 INFO L87 Difference]: Start difference. First operand 254 states and 708 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:23,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:23,688 INFO L93 Difference]: Finished difference Result 368 states and 1020 transitions. [2022-11-26 00:05:23,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:05:23,689 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 00:05:23,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:23,692 INFO L225 Difference]: With dead ends: 368 [2022-11-26 00:05:23,692 INFO L226 Difference]: Without dead ends: 368 [2022-11-26 00:05:23,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:05:23,693 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 98 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:23,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 0 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:05:23,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-11-26 00:05:23,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 296. [2022-11-26 00:05:23,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 281 states have (on average 3.110320284697509) internal successors, (874), 295 states have internal predecessors, (874), 0 states have call successors, (0), 0 states 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 00:05:23,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 874 transitions. [2022-11-26 00:05:23,706 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 874 transitions. Word has length 7 [2022-11-26 00:05:23,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:23,707 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 874 transitions. [2022-11-26 00:05:23,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:23,707 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 874 transitions. [2022-11-26 00:05:23,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:05:23,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:23,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:23,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:23,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:23,924 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:05:23,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:23,924 INFO L85 PathProgramCache]: Analyzing trace with hash 2122593422, now seen corresponding path program 1 times [2022-11-26 00:05:23,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:05:23,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103915122] [2022-11-26 00:05:23,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:23,925 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 00:05:23,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:05:23,927 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:23,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 (20)] Waiting until timeout for monitored process [2022-11-26 00:05:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:24,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-26 00:05:24,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:24,298 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-26 00:05:24,299 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 00:05:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:05:24,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:05:24,342 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:05:24,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103915122] [2022-11-26 00:05:24,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103915122] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:24,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:24,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-26 00:05:24,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21531315] [2022-11-26 00:05:24,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:24,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:05:24,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:05:24,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:05:24,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:24,344 INFO L87 Difference]: Start difference. First operand 296 states and 874 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:24,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:24,554 INFO L93 Difference]: Finished difference Result 264 states and 776 transitions. [2022-11-26 00:05:24,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:05:24,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 00:05:24,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:24,556 INFO L225 Difference]: With dead ends: 264 [2022-11-26 00:05:24,556 INFO L226 Difference]: Without dead ends: 264 [2022-11-26 00:05:24,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:24,557 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 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 00:05:24,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:05:24,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-26 00:05:24,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-11-26 00:05:24,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 254 states have (on average 3.0551181102362204) internal successors, (776), 263 states have internal predecessors, (776), 0 states have call successors, (0), 0 states 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 00:05:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 776 transitions. [2022-11-26 00:05:24,567 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 776 transitions. Word has length 7 [2022-11-26 00:05:24,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:24,567 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 776 transitions. [2022-11-26 00:05:24,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:24,568 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 776 transitions. [2022-11-26 00:05:24,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:05:24,569 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:24,569 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:24,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 (20)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:24,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:24,788 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:05:24,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:24,788 INFO L85 PathProgramCache]: Analyzing trace with hash 2122593423, now seen corresponding path program 1 times [2022-11-26 00:05:24,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:05:24,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551786519] [2022-11-26 00:05:24,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:24,791 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 00:05:24,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:05:24,792 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:24,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-26 00:05:25,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:25,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:05:25,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:25,212 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:05:25,213 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 00:05:25,501 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 00:05:25,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:25,874 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 00:05:25,874 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:05:25,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551786519] [2022-11-26 00:05:25,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551786519] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:25,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1277958539] [2022-11-26 00:05:25,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:25,875 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:05:25,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:05:25,877 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:05:25,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-26 00:05:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:26,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:05:26,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:26,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-26 00:05:26,324 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-26 00:05:26,324 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 00:05:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:05:26,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:05:26,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1277958539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:26,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-26 00:05:26,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-26 00:05:26,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377613572] [2022-11-26 00:05:26,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:26,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:05:26,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:05:26,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:05:26,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:05:26,474 INFO L87 Difference]: Start difference. First operand 264 states and 776 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:26,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:26,664 INFO L93 Difference]: Finished difference Result 232 states and 678 transitions. [2022-11-26 00:05:26,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:05:26,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 00:05:26,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:26,667 INFO L225 Difference]: With dead ends: 232 [2022-11-26 00:05:26,667 INFO L226 Difference]: Without dead ends: 232 [2022-11-26 00:05:26,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:05:26,668 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 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 00:05:26,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:05:26,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-11-26 00:05:26,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2022-11-26 00:05:26,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 227 states have (on average 2.986784140969163) internal successors, (678), 231 states have internal predecessors, (678), 0 states have call successors, (0), 0 states 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 00:05:26,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 678 transitions. [2022-11-26 00:05:26,676 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 678 transitions. Word has length 7 [2022-11-26 00:05:26,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:26,677 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 678 transitions. [2022-11-26 00:05:26,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:26,677 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 678 transitions. [2022-11-26 00:05:26,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-26 00:05:26,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:26,678 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:26,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:26,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-11-26 00:05:27,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:27,082 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:05:27,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:27,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1370095339, now seen corresponding path program 1 times [2022-11-26 00:05:27,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:05:27,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134158802] [2022-11-26 00:05:27,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:27,084 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 00:05:27,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:05:27,085 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:27,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:27,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:05:27,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:27,426 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:05:27,427 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 00:05:27,653 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 00:05:27,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:28,216 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 00:05:28,216 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:05:28,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134158802] [2022-11-26 00:05:28,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134158802] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:28,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1646050351] [2022-11-26 00:05:28,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:28,217 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:05:28,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:05:28,218 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:05:28,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-11-26 00:05:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:28,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:05:28,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:28,694 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 00:05:28,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:29,045 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 00:05:29,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1646050351] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:29,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610035036] [2022-11-26 00:05:29,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:29,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:29,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:29,047 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:05:29,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-26 00:05:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:29,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:05:29,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:29,333 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 00:05:29,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:29,449 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 00:05:29,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610035036] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:29,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:05:29,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 20 [2022-11-26 00:05:29,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019545378] [2022-11-26 00:05:29,450 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:05:29,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-26 00:05:29,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:05:29,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-26 00:05:29,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:05:29,452 INFO L87 Difference]: Start difference. First operand 232 states and 678 transitions. Second operand has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:34,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:34,033 INFO L93 Difference]: Finished difference Result 573 states and 1641 transitions. [2022-11-26 00:05:34,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 00:05:34,034 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-26 00:05:34,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:34,036 INFO L225 Difference]: With dead ends: 573 [2022-11-26 00:05:34,037 INFO L226 Difference]: Without dead ends: 573 [2022-11-26 00:05:34,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=270, Invalid=920, Unknown=0, NotChecked=0, Total=1190 [2022-11-26 00:05:34,037 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 516 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:34,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 0 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-26 00:05:34,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-11-26 00:05:34,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 457. [2022-11-26 00:05:34,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 452 states have (on average 3.099557522123894) internal successors, (1401), 456 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states 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 00:05:34,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 1401 transitions. [2022-11-26 00:05:34,056 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 1401 transitions. Word has length 8 [2022-11-26 00:05:34,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:34,056 INFO L495 AbstractCegarLoop]: Abstraction has 457 states and 1401 transitions. [2022-11-26 00:05:34,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:34,057 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 1401 transitions. [2022-11-26 00:05:34,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-26 00:05:34,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:34,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:34,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:34,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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)] Ended with exit code 0 [2022-11-26 00:05:34,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-26 00:05:34,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:34,664 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:05:34,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:34,664 INFO L85 PathProgramCache]: Analyzing trace with hash -297362301, now seen corresponding path program 1 times [2022-11-26 00:05:34,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:05:34,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2079206786] [2022-11-26 00:05:34,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:34,665 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 00:05:34,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:05:34,666 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:34,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-26 00:05:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:34,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:05:34,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:05:34,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:05:34,932 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:05:34,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2079206786] [2022-11-26 00:05:34,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2079206786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:34,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:34,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:05:34,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333191120] [2022-11-26 00:05:34,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:34,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:05:34,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:05:34,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:05:34,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:05:34,934 INFO L87 Difference]: Start difference. First operand 457 states and 1401 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:35,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:35,275 INFO L93 Difference]: Finished difference Result 627 states and 1933 transitions. [2022-11-26 00:05:35,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:05:35,276 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-26 00:05:35,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:35,281 INFO L225 Difference]: With dead ends: 627 [2022-11-26 00:05:35,281 INFO L226 Difference]: Without dead ends: 627 [2022-11-26 00:05:35,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:05:35,282 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:35,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:05:35,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-11-26 00:05:35,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 539. [2022-11-26 00:05:35,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 534 states have (on average 3.2677902621722845) internal successors, (1745), 538 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states 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 00:05:35,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1745 transitions. [2022-11-26 00:05:35,302 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1745 transitions. Word has length 9 [2022-11-26 00:05:35,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:35,302 INFO L495 AbstractCegarLoop]: Abstraction has 539 states and 1745 transitions. [2022-11-26 00:05:35,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:35,303 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1745 transitions. [2022-11-26 00:05:35,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-26 00:05:35,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:35,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:35,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:35,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:35,518 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:05:35,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:35,519 INFO L85 PathProgramCache]: Analyzing trace with hash -628292647, now seen corresponding path program 1 times [2022-11-26 00:05:35,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:05:35,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402101315] [2022-11-26 00:05:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:35,520 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 00:05:35,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:05:35,521 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:35,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:35,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:05:35,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:35,886 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:05:35,887 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 00:05:36,123 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 00:05:36,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:36,701 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 00:05:36,701 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:05:36,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402101315] [2022-11-26 00:05:36,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402101315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:36,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2008132871] [2022-11-26 00:05:36,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:36,702 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:05:36,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:05:36,703 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:05:36,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-11-26 00:05:36,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:36,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:05:36,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:37,246 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 00:05:37,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:37,642 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 00:05:37,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2008132871] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:37,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315511029] [2022-11-26 00:05:37,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:37,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:37,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:37,644 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:05:37,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-26 00:05:37,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:37,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:05:37,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:37,957 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 00:05:37,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:38,069 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 00:05:38,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315511029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:38,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:05:38,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 20 [2022-11-26 00:05:38,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006227766] [2022-11-26 00:05:38,070 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:05:38,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-26 00:05:38,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:05:38,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-26 00:05:38,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:05:38,072 INFO L87 Difference]: Start difference. First operand 539 states and 1745 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:42,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:42,067 INFO L93 Difference]: Finished difference Result 811 states and 2561 transitions. [2022-11-26 00:05:42,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 00:05:42,068 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-26 00:05:42,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:42,074 INFO L225 Difference]: With dead ends: 811 [2022-11-26 00:05:42,075 INFO L226 Difference]: Without dead ends: 811 [2022-11-26 00:05:42,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=270, Invalid=920, Unknown=0, NotChecked=0, Total=1190 [2022-11-26 00:05:42,076 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 435 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:42,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 0 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-26 00:05:42,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-11-26 00:05:42,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 731. [2022-11-26 00:05:42,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 726 states have (on average 3.3071625344352618) internal successors, (2401), 730 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states 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 00:05:42,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 2401 transitions. [2022-11-26 00:05:42,101 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 2401 transitions. Word has length 10 [2022-11-26 00:05:42,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:42,101 INFO L495 AbstractCegarLoop]: Abstraction has 731 states and 2401 transitions. [2022-11-26 00:05:42,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:05:42,102 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 2401 transitions. [2022-11-26 00:05:42,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:05:42,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:42,103 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-26 00:05:42,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2022-11-26 00:05:42,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-26 00:05:42,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:42,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:42,707 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:05:42,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:42,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1291283656, now seen corresponding path program 3 times [2022-11-26 00:05:42,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:05:42,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [151481106] [2022-11-26 00:05:42,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:05:42,709 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 00:05:42,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:05:42,710 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:42,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:05:42,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 00:05:42,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:05:43,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 00:05:43,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:43,169 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:05:43,169 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 00:05:43,865 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 00:05:43,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:47,950 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 00:05:47,950 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:05:47,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [151481106] [2022-11-26 00:05:47,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [151481106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:47,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1339491826] [2022-11-26 00:05:47,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:05:47,950 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:05:47,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:05:47,952 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:05:47,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-26 00:05:48,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 00:05:48,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:05:48,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 00:05:48,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:49,142 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:05:49,142 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 00:05:49,417 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 00:05:49,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:54,556 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 00:05:54,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1339491826] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:54,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930060672] [2022-11-26 00:05:54,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:05:54,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:54,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:54,559 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:05:54,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-26 00:05:57,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 00:05:57,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:05:57,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:05:57,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:57,483 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:05:57,483 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 00:05:58,687 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 00:05:58,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:05:59,192 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 00:05:59,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930060672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:05:59,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:05:59,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 42 [2022-11-26 00:05:59,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034698733] [2022-11-26 00:05:59,192 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:05:59,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-26 00:05:59,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:05:59,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-26 00:05:59,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2022-11-26 00:05:59,195 INFO L87 Difference]: Start difference. First operand 731 states and 2401 transitions. Second operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:29,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:06:29,889 INFO L93 Difference]: Finished difference Result 10605 states and 37275 transitions. [2022-11-26 00:06:29,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-26 00:06:29,891 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-26 00:06:29,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:06:29,970 INFO L225 Difference]: With dead ends: 10605 [2022-11-26 00:06:29,970 INFO L226 Difference]: Without dead ends: 10605 [2022-11-26 00:06:29,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=941, Invalid=1921, Unknown=0, NotChecked=0, Total=2862 [2022-11-26 00:06:29,972 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 4735 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4470 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4735 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 4470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:06:29,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4735 Valid, 0 Invalid, 4478 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8 Valid, 4470 Invalid, 0 Unknown, 0 Unchecked, 16.1s Time] [2022-11-26 00:06:29,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10605 states. [2022-11-26 00:06:30,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10605 to 743. [2022-11-26 00:06:30,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 738 states have (on average 3.285907859078591) internal successors, (2425), 742 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states 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 00:06:30,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 2425 transitions. [2022-11-26 00:06:30,176 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 2425 transitions. Word has length 12 [2022-11-26 00:06:30,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:06:30,176 INFO L495 AbstractCegarLoop]: Abstraction has 743 states and 2425 transitions. [2022-11-26 00:06:30,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:06:30,177 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 2425 transitions. [2022-11-26 00:06:30,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:06:30,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:06:30,178 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:06:30,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-26 00:06:30,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-11-26 00:06:30,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:06:30,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:06:30,792 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:06:30,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:06:30,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1992065309, now seen corresponding path program 2 times [2022-11-26 00:06:30,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:06:30,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109620799] [2022-11-26 00:06:30,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:06:30,793 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 00:06:30,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:06:30,794 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:06:30,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:06:30,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:06:30,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:06:31,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 00:06:31,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:31,237 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:06:31,237 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 00:06:31,830 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 00:06:31,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:33,994 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 00:06:33,995 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:06:33,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109620799] [2022-11-26 00:06:33,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109620799] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:06:33,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1301379585] [2022-11-26 00:06:33,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:06:33,995 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:06:33,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:06:33,997 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:06:34,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-26 00:06:34,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:06:34,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:06:34,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:06:34,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:35,111 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 00:06:35,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:36,228 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 00:06:36,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1301379585] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:06:36,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495928111] [2022-11-26 00:06:36,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:06:36,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:06:36,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:06:36,229 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:06:36,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-26 00:06:36,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:06:36,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:06:36,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:06:36,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:06:36,538 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 00:06:36,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:36,606 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 00:06:36,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495928111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:06:36,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:06:36,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 33 [2022-11-26 00:06:36,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404289311] [2022-11-26 00:06:36,607 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:06:36,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-26 00:06:36,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:06:36,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-26 00:06:36,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:06:36,609 INFO L87 Difference]: Start difference. First operand 743 states and 2425 transitions. Second operand has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:07:07,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:07:07,935 INFO L93 Difference]: Finished difference Result 2293 states and 7135 transitions. [2022-11-26 00:07:07,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-26 00:07:07,938 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-26 00:07:07,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:07:07,948 INFO L225 Difference]: With dead ends: 2293 [2022-11-26 00:07:07,948 INFO L226 Difference]: Without dead ends: 2293 [2022-11-26 00:07:07,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=811, Invalid=2611, Unknown=0, NotChecked=0, Total=3422 [2022-11-26 00:07:07,950 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1069 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2004 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1069 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:07:07,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1069 Valid, 0 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2004 Invalid, 0 Unknown, 0 Unchecked, 16.1s Time] [2022-11-26 00:07:07,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2022-11-26 00:07:07,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 1237. [2022-11-26 00:07:07,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1232 states have (on average 3.3400974025974026) internal successors, (4115), 1236 states have internal predecessors, (4115), 0 states have call successors, (0), 0 states 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 00:07:07,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 4115 transitions. [2022-11-26 00:07:08,000 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 4115 transitions. Word has length 12 [2022-11-26 00:07:08,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:07:08,000 INFO L495 AbstractCegarLoop]: Abstraction has 1237 states and 4115 transitions. [2022-11-26 00:07:08,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:07:08,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 4115 transitions. [2022-11-26 00:07:08,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:07:08,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:07:08,003 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1] [2022-11-26 00:07:08,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-26 00:07:08,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-26 00:07:08,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2022-11-26 00:07:08,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:07:08,619 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:07:08,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:07:08,619 INFO L85 PathProgramCache]: Analyzing trace with hash -973301173, now seen corresponding path program 3 times [2022-11-26 00:07:08,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:07:08,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [125492146] [2022-11-26 00:07:08,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:07:08,620 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 00:07:08,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:07:08,622 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:07:08,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:07:09,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-26 00:07:09,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:07:09,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 00:07:09,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:07:09,253 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:07:09,253 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 00:07:09,918 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:07:09,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:07:09,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-26 00:07:09,970 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-26 00:07:09,978 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-26 00:07:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:07:11,900 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:07:11,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [125492146] [2022-11-26 00:07:11,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [125492146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:07:11,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1384833586] [2022-11-26 00:07:11,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:07:11,900 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:07:11,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:07:11,901 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:07:11,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-26 00:07:13,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-26 00:07:13,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:07:13,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 00:07:13,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:07:13,511 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:07:13,511 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 00:07:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:07:13,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:07:13,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-26 00:07:13,841 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-26 00:07:13,845 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-26 00:07:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:07:14,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1384833586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:07:14,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866060062] [2022-11-26 00:07:14,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:07:14,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:07:14,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:07:14,084 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:07:14,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-26 00:07:14,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-26 00:07:14,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:07:14,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:07:14,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:07:15,432 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:07:15,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:07:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:07:16,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866060062] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:07:16,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:07:16,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 10, 10] total 39 [2022-11-26 00:07:16,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468551595] [2022-11-26 00:07:16,805 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:07:16,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-26 00:07:16,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:07:16,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-26 00:07:16,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2022-11-26 00:07:16,807 INFO L87 Difference]: Start difference. First operand 1237 states and 4115 transitions. Second operand has 40 states, 40 states have (on average 1.3) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 00:07:30,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-26 00:08:00,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:08:00,927 INFO L93 Difference]: Finished difference Result 2669 states and 8363 transitions. [2022-11-26 00:08:00,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-26 00:08:00,929 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.3) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 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 00:08:00,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:08:00,940 INFO L225 Difference]: With dead ends: 2669 [2022-11-26 00:08:00,940 INFO L226 Difference]: Without dead ends: 2669 [2022-11-26 00:08:00,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=757, Invalid=4355, Unknown=0, NotChecked=0, Total=5112 [2022-11-26 00:08:00,943 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1273 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5102 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 5102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:08:00,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1273 Valid, 0 Invalid, 5126 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [24 Valid, 5102 Invalid, 0 Unknown, 0 Unchecked, 30.8s Time] [2022-11-26 00:08:00,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2669 states. [2022-11-26 00:08:00,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2669 to 1743. [2022-11-26 00:08:01,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1743 states, 1738 states have (on average 3.4182968929804374) internal successors, (5941), 1742 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states 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 00:08:01,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 5941 transitions. [2022-11-26 00:08:01,010 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 5941 transitions. Word has length 14 [2022-11-26 00:08:01,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:08:01,011 INFO L495 AbstractCegarLoop]: Abstraction has 1743 states and 5941 transitions. [2022-11-26 00:08:01,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.3) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states 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 00:08:01,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 5941 transitions. [2022-11-26 00:08:01,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-26 00:08:01,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:08:01,015 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:08:01,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:08:01,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-26 00:08:01,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-26 00:08:01,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:08:01,629 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:08:01,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:08:01,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1702471654, now seen corresponding path program 2 times [2022-11-26 00:08:01,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:08:01,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1948111990] [2022-11-26 00:08:01,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:08:01,630 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 00:08:01,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:08:01,632 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:08:01,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:08:01,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:08:01,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:08:01,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 00:08:01,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:08:02,066 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:08:02,067 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 00:08:02,673 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 00:08:02,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:08:04,837 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 00:08:04,838 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:08:04,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1948111990] [2022-11-26 00:08:04,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1948111990] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:08:04,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [521291576] [2022-11-26 00:08:04,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:08:04,838 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:08:04,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:08:04,840 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:08:04,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-26 00:08:05,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:08:05,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:08:05,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-26 00:08:05,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:08:05,925 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 00:08:05,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:08:07,005 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 00:08:07,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [521291576] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:08:07,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160170845] [2022-11-26 00:08:07,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-26 00:08:07,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:08:07,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:08:07,007 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:08:07,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-26 00:08:07,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-26 00:08:07,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:08:07,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-26 00:08:07,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:08:07,449 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:08:07,449 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 00:08:08,538 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 00:08:08,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:08:08,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-26 00:08:08,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-26 00:08:08,615 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-26 00:08:11,014 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 00:08:11,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160170845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:08:11,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:08:11,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8, 8, 8, 8] total 47 [2022-11-26 00:08:11,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232360043] [2022-11-26 00:08:11,016 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:08:11,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-26 00:08:11,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:08:11,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-26 00:08:11,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1926, Unknown=0, NotChecked=0, Total=2256 [2022-11-26 00:08:11,018 INFO L87 Difference]: Start difference. First operand 1743 states and 5941 transitions. Second operand has 48 states, 48 states have (on average 1.625) internal successors, (78), 47 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:08:57,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:08:57,051 INFO L93 Difference]: Finished difference Result 3163 states and 9901 transitions. [2022-11-26 00:08:57,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-26 00:08:57,053 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 47 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-26 00:08:57,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:08:57,061 INFO L225 Difference]: With dead ends: 3163 [2022-11-26 00:08:57,061 INFO L226 Difference]: Without dead ends: 3163 [2022-11-26 00:08:57,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1644 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=956, Invalid=4896, Unknown=0, NotChecked=0, Total=5852 [2022-11-26 00:08:57,063 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1157 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3462 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1157 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:08:57,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1157 Valid, 0 Invalid, 3497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3462 Invalid, 0 Unknown, 0 Unchecked, 23.3s Time] [2022-11-26 00:08:57,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2022-11-26 00:08:57,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 2079. [2022-11-26 00:08:57,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2074 states have (on average 3.4161041465766635) internal successors, (7085), 2078 states have internal predecessors, (7085), 0 states have call successors, (0), 0 states 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 00:08:57,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 7085 transitions. [2022-11-26 00:08:57,143 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 7085 transitions. Word has length 14 [2022-11-26 00:08:57,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:08:57,143 INFO L495 AbstractCegarLoop]: Abstraction has 2079 states and 7085 transitions. [2022-11-26 00:08:57,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 47 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:08:57,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 7085 transitions. [2022-11-26 00:08:57,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:08:57,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:08:57,147 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1] [2022-11-26 00:08:57,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-26 00:08:57,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-11-26 00:08:57,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-26 00:08:57,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:08:57,752 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:08:57,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:08:57,753 INFO L85 PathProgramCache]: Analyzing trace with hash -715028387, now seen corresponding path program 4 times [2022-11-26 00:08:57,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:08:57,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [876177023] [2022-11-26 00:08:57,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:08:57,753 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 00:08:57,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:08:57,755 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:08:57,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-26 00:08:58,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:08:58,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:08:58,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 00:08:58,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:08:58,718 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:08:58,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:09:00,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-11-26 00:09:01,866 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:09:01,866 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:09:01,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [876177023] [2022-11-26 00:09:01,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [876177023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:09:01,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [944920321] [2022-11-26 00:09:01,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:09:01,867 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:09:01,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:09:01,868 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:09:01,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-26 00:09:02,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:09:02,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:09:02,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 00:09:02,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:09:02,497 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:09:02,498 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 00:09:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:09:04,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:09:07,999 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:09:07,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [944920321] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:09:07,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712545049] [2022-11-26 00:09:08,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:09:08,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:09:08,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:09:08,001 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:09:08,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-26 00:09:08,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:09:08,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:09:08,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 00:09:08,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:09:08,440 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:09:08,440 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 00:09:10,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 10 [2022-11-26 00:09:10,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-26 00:09:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:09:11,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:09:11,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-26 00:09:11,217 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-26 00:09:11,221 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-26 00:09:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:09:18,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712545049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:09:18,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:09:18,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 12, 12] total 69 [2022-11-26 00:09:18,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75672196] [2022-11-26 00:09:18,034 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:09:18,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-26 00:09:18,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:09:18,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-26 00:09:18,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=4452, Unknown=0, NotChecked=0, Total=4970 [2022-11-26 00:09:18,038 INFO L87 Difference]: Start difference. First operand 2079 states and 7085 transitions. Second operand has 71 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 00:11:26,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:11:26,992 INFO L93 Difference]: Finished difference Result 10104 states and 31736 transitions. [2022-11-26 00:11:26,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-26 00:11:26,993 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 0 states have call successors, (0), 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 00:11:26,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:11:27,038 INFO L225 Difference]: With dead ends: 10104 [2022-11-26 00:11:27,038 INFO L226 Difference]: Without dead ends: 10104 [2022-11-26 00:11:27,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6883 ImplicationChecksByTransitivity, 106.2s TimeCoverageRelationStatistics Valid=3708, Invalid=19854, Unknown=0, NotChecked=0, Total=23562 [2022-11-26 00:11:27,046 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 6945 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10318 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6945 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 10365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 10318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:11:27,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6945 Valid, 0 Invalid, 10365 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [47 Valid, 10318 Invalid, 0 Unknown, 0 Unchecked, 38.3s Time] [2022-11-26 00:11:27,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10104 states. [2022-11-26 00:11:27,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10104 to 2660. [2022-11-26 00:11:27,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2660 states, 2655 states have (on average 3.560075329566855) internal successors, (9452), 2659 states have internal predecessors, (9452), 0 states have call successors, (0), 0 states 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 00:11:27,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2660 states to 2660 states and 9452 transitions. [2022-11-26 00:11:27,284 INFO L78 Accepts]: Start accepts. Automaton has 2660 states and 9452 transitions. Word has length 16 [2022-11-26 00:11:27,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:11:27,284 INFO L495 AbstractCegarLoop]: Abstraction has 2660 states and 9452 transitions. [2022-11-26 00:11:27,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 00:11:27,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2660 states and 9452 transitions. [2022-11-26 00:11:27,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:11:27,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:11:27,288 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2022-11-26 00:11:27,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-26 00:11:27,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2022-11-26 00:11:27,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-26 00:11:27,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:11:27,899 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:11:27,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:11:27,900 INFO L85 PathProgramCache]: Analyzing trace with hash -998807061, now seen corresponding path program 5 times [2022-11-26 00:11:27,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:11:27,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050854243] [2022-11-26 00:11:27,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-26 00:11:27,900 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 00:11:27,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:11:27,902 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:11:27,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-26 00:11:28,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-26 00:11:28,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:11:28,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-26 00:11:28,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:11:28,741 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:11:28,742 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 00:11:29,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-26 00:11:29,933 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:11:29,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:11:30,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-26 00:11:30,444 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-26 00:11:30,449 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-26 00:11:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:11:35,254 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:11:35,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050854243] [2022-11-26 00:11:35,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050854243] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:11:35,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [973560908] [2022-11-26 00:11:35,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-26 00:11:35,254 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:11:35,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:11:35,255 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:11:35,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-26 00:11:36,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-26 00:11:36,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:11:36,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:11:36,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:11:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:11:38,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:11:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:11:41,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [973560908] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:11:41,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176176879] [2022-11-26 00:11:41,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-26 00:11:41,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:11:41,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:11:41,467 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:11:41,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-26 00:11:42,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-26 00:11:42,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:11:42,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-26 00:11:42,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:11:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:11:44,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:11:46,778 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:11:46,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176176879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:11:46,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:11:46,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 70 [2022-11-26 00:11:46,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387204920] [2022-11-26 00:11:46,779 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:11:46,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-26 00:11:46,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:11:46,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-26 00:11:46,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=4357, Unknown=0, NotChecked=0, Total=5112 [2022-11-26 00:11:46,783 INFO L87 Difference]: Start difference. First operand 2660 states and 9452 transitions. Second operand has 72 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 71 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 00:12:26,951 WARN L233 SmtUtils]: Spent 5.26s on a formula simplification. DAG size of input: 107 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:13:02,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:13:02,408 INFO L93 Difference]: Finished difference Result 3920 states and 12898 transitions. [2022-11-26 00:13:02,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-26 00:13:02,410 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 71 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-26 00:13:02,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:13:02,420 INFO L225 Difference]: With dead ends: 3920 [2022-11-26 00:13:02,420 INFO L226 Difference]: Without dead ends: 3920 [2022-11-26 00:13:02,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4340 ImplicationChecksByTransitivity, 53.2s TimeCoverageRelationStatistics Valid=2296, Invalid=12224, Unknown=0, NotChecked=0, Total=14520 [2022-11-26 00:13:02,423 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2809 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9719 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2809 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 9798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 9719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:13:02,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2809 Valid, 0 Invalid, 9798 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [79 Valid, 9719 Invalid, 0 Unknown, 0 Unchecked, 35.9s Time] [2022-11-26 00:13:02,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3920 states. [2022-11-26 00:13:02,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3920 to 2149. [2022-11-26 00:13:02,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2149 states, 2144 states have (on average 3.3521455223880596) internal successors, (7187), 2148 states have internal predecessors, (7187), 0 states have call successors, (0), 0 states 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 00:13:02,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2149 states to 2149 states and 7187 transitions. [2022-11-26 00:13:02,495 INFO L78 Accepts]: Start accepts. Automaton has 2149 states and 7187 transitions. Word has length 16 [2022-11-26 00:13:02,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:13:02,495 INFO L495 AbstractCegarLoop]: Abstraction has 2149 states and 7187 transitions. [2022-11-26 00:13:02,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 71 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 00:13:02,495 INFO L276 IsEmpty]: Start isEmpty. Operand 2149 states and 7187 transitions. [2022-11-26 00:13:02,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-26 00:13:02,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:13:02,499 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:13:02,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2022-11-26 00:13:02,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-11-26 00:13:02,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-11-26 00:13:03,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:13:03,100 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:13:03,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:13:03,101 INFO L85 PathProgramCache]: Analyzing trace with hash 138567161, now seen corresponding path program 3 times [2022-11-26 00:13:03,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:13:03,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1829517247] [2022-11-26 00:13:03,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:13:03,101 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 00:13:03,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:13:03,103 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:13:03,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-26 00:13:03,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-26 00:13:03,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:13:03,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 00:13:03,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:13:03,792 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:13:03,792 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 00:13:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:13:04,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:13:04,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-26 00:13:04,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-26 00:13:04,520 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-26 00:13:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:13:06,339 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:13:06,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1829517247] [2022-11-26 00:13:06,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1829517247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:13:06,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [388645225] [2022-11-26 00:13:06,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:13:06,339 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:13:06,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:13:06,340 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:13:06,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-26 00:13:07,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-26 00:13:07,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:13:07,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 00:13:07,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:13:08,174 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:13:08,175 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 00:13:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:13:08,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:13:08,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-26 00:13:08,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-26 00:13:08,521 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-26 00:13:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:13:08,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [388645225] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:13:08,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672005761] [2022-11-26 00:13:08,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:13:08,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:08,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:13:08,732 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:13:08,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-26 00:13:09,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-26 00:13:09,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:13:09,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:13:09,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:13:09,381 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:13:09,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-26 00:13:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:13:09,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:13:10,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-26 00:13:10,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-26 00:13:10,052 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-26 00:13:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:13:11,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672005761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:13:11,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:13:11,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 10, 10] total 30 [2022-11-26 00:13:11,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675586237] [2022-11-26 00:13:11,408 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:13:11,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-26 00:13:11,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:13:11,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-26 00:13:11,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-11-26 00:13:11,410 INFO L87 Difference]: Start difference. First operand 2149 states and 7187 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:13:37,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:13:37,896 INFO L93 Difference]: Finished difference Result 3065 states and 9383 transitions. [2022-11-26 00:13:37,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-26 00:13:37,899 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-26 00:13:37,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:13:37,904 INFO L225 Difference]: With dead ends: 3065 [2022-11-26 00:13:37,905 INFO L226 Difference]: Without dead ends: 3065 [2022-11-26 00:13:37,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=487, Invalid=1963, Unknown=0, NotChecked=0, Total=2450 [2022-11-26 00:13:37,906 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1005 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2709 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:13:37,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1005 Valid, 0 Invalid, 2726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2709 Invalid, 0 Unknown, 0 Unchecked, 19.1s Time] [2022-11-26 00:13:37,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2022-11-26 00:13:37,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 2465. [2022-11-26 00:13:37,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2465 states, 2460 states have (on average 3.2914634146341464) internal successors, (8097), 2464 states have internal predecessors, (8097), 0 states have call successors, (0), 0 states 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 00:13:37,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 8097 transitions. [2022-11-26 00:13:37,957 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 8097 transitions. Word has length 16 [2022-11-26 00:13:37,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:13:37,958 INFO L495 AbstractCegarLoop]: Abstraction has 2465 states and 8097 transitions. [2022-11-26 00:13:37,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 30 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:13:37,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 8097 transitions. [2022-11-26 00:13:37,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-26 00:13:37,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:13:37,963 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:13:37,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-26 00:13:38,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-26 00:13:38,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2022-11-26 00:13:38,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:13:38,574 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:13:38,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:13:38,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1359356122, now seen corresponding path program 4 times [2022-11-26 00:13:38,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:13:38,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033618951] [2022-11-26 00:13:38,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:13:38,575 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 00:13:38,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:13:38,576 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:13:38,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-26 00:13:38,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:13:38,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:13:38,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-26 00:13:38,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:13:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:13:39,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:13:41,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-11-26 00:13:42,442 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:13:42,442 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:13:42,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033618951] [2022-11-26 00:13:42,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033618951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:13:42,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [968738778] [2022-11-26 00:13:42,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:13:42,443 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:13:42,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:13:42,444 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:13:42,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-26 00:13:43,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:13:43,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:13:43,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 00:13:43,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:13:43,249 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:13:43,249 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 00:13:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:13:45,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:13:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:13:48,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [968738778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:13:48,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812701224] [2022-11-26 00:13:48,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:13:48,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:48,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:13:48,610 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:13:48,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-26 00:13:48,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:13:48,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:13:48,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 00:13:48,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:13:49,066 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:13:49,066 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 00:13:51,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-26 00:13:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:13:51,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:13:51,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-26 00:13:51,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-26 00:13:52,009 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-26 00:13:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:13:59,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812701224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:13:59,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:13:59,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 71 [2022-11-26 00:13:59,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181473908] [2022-11-26 00:13:59,734 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:13:59,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-26 00:13:59,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:13:59,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-26 00:13:59,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=4687, Unknown=0, NotChecked=0, Total=5256 [2022-11-26 00:13:59,736 INFO L87 Difference]: Start difference. First operand 2465 states and 8097 transitions. Second operand has 73 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 72 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 00:16:14,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:16:14,380 INFO L93 Difference]: Finished difference Result 13692 states and 44230 transitions. [2022-11-26 00:16:14,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-26 00:16:14,381 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 72 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-26 00:16:14,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:16:14,422 INFO L225 Difference]: With dead ends: 13692 [2022-11-26 00:16:14,423 INFO L226 Difference]: Without dead ends: 13692 [2022-11-26 00:16:14,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7052 ImplicationChecksByTransitivity, 102.3s TimeCoverageRelationStatistics Valid=3733, Invalid=20137, Unknown=0, NotChecked=0, Total=23870 [2022-11-26 00:16:14,426 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 5992 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11218 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5992 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 11268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 11218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:16:14,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5992 Valid, 0 Invalid, 11268 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [50 Valid, 11218 Invalid, 0 Unknown, 0 Unchecked, 48.6s Time] [2022-11-26 00:16:14,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13692 states. [2022-11-26 00:16:14,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13692 to 3656. [2022-11-26 00:16:14,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3656 states, 3651 states have (on average 3.5716242125445086) internal successors, (13040), 3655 states have internal predecessors, (13040), 0 states have call successors, (0), 0 states 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 00:16:14,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 13040 transitions. [2022-11-26 00:16:14,642 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 13040 transitions. Word has length 18 [2022-11-26 00:16:14,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:16:14,643 INFO L495 AbstractCegarLoop]: Abstraction has 3656 states and 13040 transitions. [2022-11-26 00:16:14,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 72 states have internal predecessors, (97), 0 states have call successors, (0), 0 states 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 00:16:14,643 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 13040 transitions. [2022-11-26 00:16:14,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-26 00:16:14,648 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:16:14,648 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:16:14,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-26 00:16:14,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-26 00:16:15,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2022-11-26 00:16:15,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt [2022-11-26 00:16:15,259 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:16:15,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:16:15,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1397212569, now seen corresponding path program 5 times [2022-11-26 00:16:15,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:16:15,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225970526] [2022-11-26 00:16:15,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-26 00:16:15,260 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 00:16:15,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:16:15,264 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:16:15,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-26 00:16:15,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-26 00:16:15,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:16:15,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-26 00:16:15,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:16:15,788 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:16:15,788 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 00:16:16,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-26 00:16:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:16:16,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:16:17,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-11-26 00:16:17,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-11-26 00:16:17,347 WARN L207 Elim1Store]: Array PQE input equivalent to true [2022-11-26 00:16:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:16:22,457 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:16:22,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225970526] [2022-11-26 00:16:22,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225970526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:16:22,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1844771849] [2022-11-26 00:16:22,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-26 00:16:22,458 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:16:22,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:16:22,459 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:16:22,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-26 00:16:23,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-26 00:16:23,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:16:23,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:16:23,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:16:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:16:25,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:16:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:16:28,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1844771849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:16:28,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440199822] [2022-11-26 00:16:28,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-26 00:16:28,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:16:28,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:16:28,454 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:16:28,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-26 00:16:29,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-26 00:16:29,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:16:29,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-26 00:16:29,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:16:31,366 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:16:31,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:16:33,456 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:16:33,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440199822] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:16:33,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:16:33,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 70 [2022-11-26 00:16:33,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755439838] [2022-11-26 00:16:33,457 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:16:33,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-26 00:16:33,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:16:33,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-26 00:16:33,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=767, Invalid=4345, Unknown=0, NotChecked=0, Total=5112 [2022-11-26 00:16:33,459 INFO L87 Difference]: Start difference. First operand 3656 states and 13040 transitions. Second operand has 72 states, 71 states have (on average 1.352112676056338) internal successors, (96), 71 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:35,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:17:35,554 INFO L93 Difference]: Finished difference Result 5108 states and 17032 transitions. [2022-11-26 00:17:35,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-26 00:17:35,558 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.352112676056338) internal successors, (96), 71 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-26 00:17:35,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:17:35,570 INFO L225 Difference]: With dead ends: 5108 [2022-11-26 00:17:35,570 INFO L226 Difference]: Without dead ends: 5108 [2022-11-26 00:17:35,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4317 ImplicationChecksByTransitivity, 44.6s TimeCoverageRelationStatistics Valid=2286, Invalid=11994, Unknown=0, NotChecked=0, Total=14280 [2022-11-26 00:17:35,571 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2471 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10002 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2471 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 10081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 10002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:17:35,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2471 Valid, 0 Invalid, 10081 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [79 Valid, 10002 Invalid, 0 Unknown, 0 Unchecked, 30.4s Time] [2022-11-26 00:17:35,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5108 states. [2022-11-26 00:17:35,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5108 to 3117. [2022-11-26 00:17:35,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3117 states, 3112 states have (on average 3.363431876606684) internal successors, (10467), 3116 states have internal predecessors, (10467), 0 states have call successors, (0), 0 states 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 00:17:35,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 10467 transitions. [2022-11-26 00:17:35,728 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 10467 transitions. Word has length 18 [2022-11-26 00:17:35,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:17:35,729 INFO L495 AbstractCegarLoop]: Abstraction has 3117 states and 10467 transitions. [2022-11-26 00:17:35,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 1.352112676056338) internal successors, (96), 71 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:17:35,729 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 10467 transitions. [2022-11-26 00:17:35,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-26 00:17:35,734 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:17:35,738 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1] [2022-11-26 00:17:35,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2022-11-26 00:17:35,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-26 00:17:36,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Ended with exit code 0 [2022-11-26 00:17:36,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:17:36,357 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-26 00:17:36,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:17:36,357 INFO L85 PathProgramCache]: Analyzing trace with hash -708392712, now seen corresponding path program 4 times [2022-11-26 00:17:36,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-26 00:17:36,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573818041] [2022-11-26 00:17:36,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:17:36,358 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 00:17:36,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat [2022-11-26 00:17:36,359 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/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 00:17:36,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-26 00:17:36,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:17:36,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:17:36,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-26 00:17:36,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:36,786 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:17:36,787 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 00:17:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:38,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:53,244 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-26 00:17:53,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573818041] [2022-11-26 00:17:53,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573818041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:53,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1214820897] [2022-11-26 00:17:53,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:17:53,245 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-26 00:17:53,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 [2022-11-26 00:17:53,246 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-26 00:17:53,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-26 00:17:53,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:17:53,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:17:53,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-26 00:17:53,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:54,093 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:17:54,094 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 00:17:55,109 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:55,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:17:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:17:57,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1214820897] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:17:57,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378189310] [2022-11-26 00:17:57,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:17:57,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:17:57,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:17:57,319 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:17:57,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5670a0ce-52d7-4032-b279-02953fe2e01e/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-26 00:17:57,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:17:57,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:17:57,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-26 00:17:57,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:17:57,802 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-26 00:17:57,803 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 00:18:00,669 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:00,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:18:02,071 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:18:02,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378189310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:18:02,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-26 00:18:02,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23, 23, 23, 23] total 63 [2022-11-26 00:18:02,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620387576] [2022-11-26 00:18:02,073 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-26 00:18:02,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-26 00:18:02,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-26 00:18:02,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-26 00:18:02,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1080, Invalid=3080, Unknown=0, NotChecked=0, Total=4160 [2022-11-26 00:18:02,075 INFO L87 Difference]: Start difference. First operand 3117 states and 10467 transitions. Second operand has 65 states, 64 states have (on average 1.0625) internal successors, (68), 64 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)