./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3e185f9c0dac86cdbb29caae2de39811a090d813c08c4c3552062c2aa77b8788 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 10:51:31,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:51:31,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:51:31,692 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:51:31,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:51:31,693 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:51:31,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:51:31,695 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:51:31,697 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:51:31,697 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:51:31,698 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:51:31,699 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:51:31,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:51:31,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:51:31,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:51:31,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:51:31,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:51:31,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:51:31,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:51:31,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:51:31,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:51:31,709 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:51:31,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:51:31,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:51:31,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:51:31,714 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:51:31,714 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:51:31,715 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:51:31,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:51:31,716 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:51:31,716 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:51:31,717 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:51:31,717 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:51:31,718 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:51:31,719 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:51:31,719 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:51:31,720 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:51:31,720 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:51:31,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:51:31,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:51:31,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:51:31,722 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 10:51:31,751 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:51:31,752 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:51:31,752 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:51:31,752 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:51:31,753 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:51:31,753 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:51:31,753 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:51:31,753 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:51:31,754 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:51:31,754 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 10:51:31,754 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:51:31,754 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:51:31,754 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 10:51:31,754 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 10:51:31,755 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:51:31,755 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 10:51:31,755 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 10:51:31,755 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 10:51:31,756 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 10:51:31,756 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 10:51:31,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:51:31,756 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:51:31,757 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 10:51:31,757 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:51:31,757 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:51:31,757 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:51:31,757 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 10:51:31,757 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 10:51:31,758 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 10:51:31,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:51:31,758 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 10:51:31,758 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:51:31,758 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:51:31,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:51:31,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:51:31,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:51:31,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:51:31,760 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 10:51:31,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:51:31,760 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 10:51:31,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 10:51:31,760 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:51:31,761 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_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e185f9c0dac86cdbb29caae2de39811a090d813c08c4c3552062c2aa77b8788 [2022-12-14 10:51:31,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:51:31,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:51:31,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:51:31,970 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:51:31,970 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:51:31,971 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2022-12-14 10:51:34,665 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:51:34,832 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:51:34,833 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2022-12-14 10:51:34,839 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/data/c55ae7a38/cb7c2aac552840c99c261847835a0cfb/FLAG0fecbafd7 [2022-12-14 10:51:34,850 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/data/c55ae7a38/cb7c2aac552840c99c261847835a0cfb [2022-12-14 10:51:34,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:51:34,854 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:51:34,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:51:34,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:51:34,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:51:34,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:51:34" (1/1) ... [2022-12-14 10:51:34,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64dd51d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:51:34, skipping insertion in model container [2022-12-14 10:51:34,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:51:34" (1/1) ... [2022-12-14 10:51:34,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:51:34,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:51:35,006 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:51:35,007 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:51:35,008 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:51:35,009 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:51:35,010 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:51:35,011 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:51:35,020 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_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c[2815,2828] [2022-12-14 10:51:35,030 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:51:35,039 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-14 10:51:35,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@175abb83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:51:35, skipping insertion in model container [2022-12-14 10:51:35,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:51:35,040 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 10:51:35,041 INFO L158 Benchmark]: Toolchain (without parser) took 187.31ms. Allocated memory is still 138.4MB. Free memory was 101.8MB in the beginning and 91.4MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 10:51:35,042 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 138.4MB. Free memory is still 105.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 10:51:35,042 INFO L158 Benchmark]: CACSL2BoogieTranslator took 185.69ms. Allocated memory is still 138.4MB. Free memory was 101.5MB in the beginning and 91.4MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 10:51:35,043 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 138.4MB. Free memory is still 105.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 185.69ms. Allocated memory is still 138.4MB. Free memory was 101.5MB in the beginning and 91.4MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 123]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3e185f9c0dac86cdbb29caae2de39811a090d813c08c4c3552062c2aa77b8788 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 10:51:36,383 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 10:51:36,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 10:51:36,404 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 10:51:36,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 10:51:36,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 10:51:36,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 10:51:36,408 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 10:51:36,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 10:51:36,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 10:51:36,411 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 10:51:36,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 10:51:36,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 10:51:36,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 10:51:36,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 10:51:36,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 10:51:36,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 10:51:36,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 10:51:36,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 10:51:36,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 10:51:36,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 10:51:36,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 10:51:36,423 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 10:51:36,424 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 10:51:36,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 10:51:36,428 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 10:51:36,428 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 10:51:36,429 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 10:51:36,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 10:51:36,430 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 10:51:36,430 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 10:51:36,431 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 10:51:36,432 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 10:51:36,432 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 10:51:36,437 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 10:51:36,438 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 10:51:36,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 10:51:36,439 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 10:51:36,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 10:51:36,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 10:51:36,440 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 10:51:36,441 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 10:51:36,462 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 10:51:36,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 10:51:36,462 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 10:51:36,463 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 10:51:36,463 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 10:51:36,463 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 10:51:36,463 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 10:51:36,463 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 10:51:36,464 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 10:51:36,464 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 10:51:36,464 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 10:51:36,464 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 10:51:36,464 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 10:51:36,464 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 10:51:36,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 10:51:36,465 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 10:51:36,465 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 10:51:36,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 10:51:36,465 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 10:51:36,465 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 10:51:36,465 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 10:51:36,466 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 10:51:36,466 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 10:51:36,466 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 10:51:36,466 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 10:51:36,466 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 10:51:36,466 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 10:51:36,466 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 10:51:36,466 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 10:51:36,467 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 10:51:36,467 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 10:51:36,467 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 10:51:36,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:51:36,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 10:51:36,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 10:51:36,467 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 10:51:36,467 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 10:51:36,468 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 10:51:36,468 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 10:51:36,468 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_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e185f9c0dac86cdbb29caae2de39811a090d813c08c4c3552062c2aa77b8788 [2022-12-14 10:51:36,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 10:51:36,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 10:51:36,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 10:51:36,715 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 10:51:36,716 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 10:51:36,717 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2022-12-14 10:51:39,392 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 10:51:39,588 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 10:51:39,588 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2022-12-14 10:51:39,595 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/data/8467d3a63/34ce0e286913464dbb7bda7927cade64/FLAGa269ab6d7 [2022-12-14 10:51:39,606 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/data/8467d3a63/34ce0e286913464dbb7bda7927cade64 [2022-12-14 10:51:39,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 10:51:39,609 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 10:51:39,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 10:51:39,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 10:51:39,613 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 10:51:39,614 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:51:39" (1/1) ... [2022-12-14 10:51:39,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fa89bea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:51:39, skipping insertion in model container [2022-12-14 10:51:39,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 10:51:39" (1/1) ... [2022-12-14 10:51:39,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 10:51:39,636 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:51:39,758 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:51:39,759 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:51:39,760 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:51:39,761 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:51:39,761 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:51:39,762 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:51:39,769 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_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c[2815,2828] [2022-12-14 10:51:39,779 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:51:39,790 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 10:51:39,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 10:51:39,798 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:51:39,799 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:51:39,800 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:51:39,801 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:51:39,801 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:51:39,802 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:51:39,806 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_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c[2815,2828] [2022-12-14 10:51:39,810 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:51:39,813 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 10:51:39,825 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:51:39,826 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:51:39,826 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:51:39,827 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:51:39,827 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 10:51:39,828 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 10:51:39,832 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_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c[2815,2828] [2022-12-14 10:51:39,835 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 10:51:39,847 INFO L208 MainTranslator]: Completed translation [2022-12-14 10:51:39,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:51:39 WrapperNode [2022-12-14 10:51:39,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 10:51:39,848 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 10:51:39,848 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 10:51:39,848 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 10:51:39,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:51:39" (1/1) ... [2022-12-14 10:51:39,862 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:51:39" (1/1) ... [2022-12-14 10:51:39,881 INFO L138 Inliner]: procedures = 28, calls = 57, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 225 [2022-12-14 10:51:39,881 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 10:51:39,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 10:51:39,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 10:51:39,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 10:51:39,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:51:39" (1/1) ... [2022-12-14 10:51:39,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:51:39" (1/1) ... [2022-12-14 10:51:39,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:51:39" (1/1) ... [2022-12-14 10:51:39,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:51:39" (1/1) ... [2022-12-14 10:51:39,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:51:39" (1/1) ... [2022-12-14 10:51:39,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:51:39" (1/1) ... [2022-12-14 10:51:39,919 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:51:39" (1/1) ... [2022-12-14 10:51:39,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:51:39" (1/1) ... [2022-12-14 10:51:39,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 10:51:39,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 10:51:39,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 10:51:39,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 10:51:39,931 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:51:39" (1/1) ... [2022-12-14 10:51:39,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 10:51:39,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:51:39,955 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 10:51:39,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 10:51:39,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 10:51:39,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 10:51:39,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 10:51:39,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 10:51:39,983 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 10:51:39,983 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 10:51:39,983 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 10:51:39,983 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 10:51:39,984 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 10:51:39,984 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 10:51:39,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 10:51:39,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 10:51:39,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 10:51:39,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 10:51:39,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 10:51:39,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 10:51:39,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 10:51:39,985 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 10:51:40,076 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 10:51:40,077 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 10:51:40,711 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 10:51:40,810 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 10:51:40,811 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-14 10:51:40,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:51:40 BoogieIcfgContainer [2022-12-14 10:51:40,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 10:51:40,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 10:51:40,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 10:51:40,816 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 10:51:40,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 10:51:39" (1/3) ... [2022-12-14 10:51:40,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15de0c0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:51:40, skipping insertion in model container [2022-12-14 10:51:40,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 10:51:39" (2/3) ... [2022-12-14 10:51:40,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15de0c0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 10:51:40, skipping insertion in model container [2022-12-14 10:51:40,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 10:51:40" (3/3) ... [2022-12-14 10:51:40,818 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-min.wvr.c [2022-12-14 10:51:40,832 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 10:51:40,832 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2022-12-14 10:51:40,832 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 10:51:40,938 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-14 10:51:40,973 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 10:51:40,986 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 340 places, 357 transitions, 738 flow [2022-12-14 10:51:40,988 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 340 places, 357 transitions, 738 flow [2022-12-14 10:51:40,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 340 places, 357 transitions, 738 flow [2022-12-14 10:51:41,079 INFO L130 PetriNetUnfolder]: 27/354 cut-off events. [2022-12-14 10:51:41,079 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-14 10:51:41,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 354 events. 27/354 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 424 event pairs, 0 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 274. Up to 3 conditions per place. [2022-12-14 10:51:41,089 INFO L119 LiptonReduction]: Number of co-enabled transitions 5194 [2022-12-14 10:52:41,802 INFO L134 LiptonReduction]: Checked pairs total: 9225 [2022-12-14 10:52:41,802 INFO L136 LiptonReduction]: Total number of compositions: 414 [2022-12-14 10:52:41,808 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 85 places, 84 transitions, 192 flow [2022-12-14 10:52:41,932 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 4936 states, 3750 states have (on average 5.039733333333333) internal successors, (18899), 4935 states have internal predecessors, (18899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:52:41,945 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 10:52:41,950 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;@576f365c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 10:52:41,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2022-12-14 10:52:41,962 INFO L276 IsEmpty]: Start isEmpty. Operand has 4936 states, 3750 states have (on average 5.039733333333333) internal successors, (18899), 4935 states have internal predecessors, (18899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:52:41,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 10:52:41,965 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:41,966 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 10:52:41,966 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:52:41,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:41,970 INFO L85 PathProgramCache]: Analyzing trace with hash 45910, now seen corresponding path program 1 times [2022-12-14 10:52:41,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:52:41,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231673283] [2022-12-14 10:52:41,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:41,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:52:41,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:52:41,980 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:52:41,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 10:52:42,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:42,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 10:52:42,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:52:42,200 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 10:52:42,201 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 [2022-12-14 10:52:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:52:42,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:52:42,225 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:52:42,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1231673283] [2022-12-14 10:52:42,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1231673283] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:42,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:52:42,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:52:42,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745821295] [2022-12-14 10:52:42,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:42,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:52:42,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:52:42,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:52:42,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:52:42,269 INFO L87 Difference]: Start difference. First operand has 4936 states, 3750 states have (on average 5.039733333333333) internal successors, (18899), 4935 states have internal predecessors, (18899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:52:42,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:42,648 INFO L93 Difference]: Finished difference Result 2816 states and 10887 transitions. [2022-12-14 10:52:42,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:52:42,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 10:52:42,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:42,687 INFO L225 Difference]: With dead ends: 2816 [2022-12-14 10:52:42,688 INFO L226 Difference]: Without dead ends: 2816 [2022-12-14 10:52:42,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:52:42,692 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 63 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:42,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 4 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:52:42,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2816 states. [2022-12-14 10:52:42,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2816 to 2816. [2022-12-14 10:52:42,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2364 states have (on average 4.605329949238579) internal successors, (10887), 2815 states have internal predecessors, (10887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:52:42,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 10887 transitions. [2022-12-14 10:52:42,894 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 10887 transitions. Word has length 2 [2022-12-14 10:52:42,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:42,894 INFO L495 AbstractCegarLoop]: Abstraction has 2816 states and 10887 transitions. [2022-12-14 10:52:42,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:52:42,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 10887 transitions. [2022-12-14 10:52:42,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 10:52:42,895 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:42,895 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 10:52:42,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 10:52:43,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:52:43,096 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:52:43,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:43,097 INFO L85 PathProgramCache]: Analyzing trace with hash 45911, now seen corresponding path program 1 times [2022-12-14 10:52:43,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:52:43,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23029887] [2022-12-14 10:52:43,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:43,097 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:52:43,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:52:43,098 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:52:43,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 10:52:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:43,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:52:43,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:52:43,352 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:52:43,353 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 [2022-12-14 10:52:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:52:43,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:52:43,385 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:52:43,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23029887] [2022-12-14 10:52:43,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23029887] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:43,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:52:43,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 10:52:43,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327242719] [2022-12-14 10:52:43,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:43,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:52:43,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:52:43,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:52:43,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:52:43,387 INFO L87 Difference]: Start difference. First operand 2816 states and 10887 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:52:43,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:43,865 INFO L93 Difference]: Finished difference Result 2817 states and 10889 transitions. [2022-12-14 10:52:43,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:52:43,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-12-14 10:52:43,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:43,885 INFO L225 Difference]: With dead ends: 2817 [2022-12-14 10:52:43,885 INFO L226 Difference]: Without dead ends: 2817 [2022-12-14 10:52:43,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:52:43,886 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:43,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:52:43,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2022-12-14 10:52:44,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2817. [2022-12-14 10:52:44,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2817 states, 2365 states have (on average 4.604228329809725) internal successors, (10889), 2816 states have internal predecessors, (10889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:52:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 10889 transitions. [2022-12-14 10:52:44,041 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 10889 transitions. Word has length 2 [2022-12-14 10:52:44,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:44,042 INFO L495 AbstractCegarLoop]: Abstraction has 2817 states and 10889 transitions. [2022-12-14 10:52:44,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:52:44,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 10889 transitions. [2022-12-14 10:52:44,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 10:52:44,043 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:44,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 10:52:44,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 10:52:44,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:52:44,244 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:52:44,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:44,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1431363, now seen corresponding path program 1 times [2022-12-14 10:52:44,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:52:44,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051173516] [2022-12-14 10:52:44,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:44,246 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:52:44,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:52:44,247 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:52:44,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 10:52:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:44,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 10:52:44,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:52:44,441 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:52:44,442 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 [2022-12-14 10:52:44,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:52:44,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:52:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:52:44,740 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:52:44,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051173516] [2022-12-14 10:52:44,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051173516] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:52:44,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [257265661] [2022-12-14 10:52:44,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:44,740 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:52:44,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:52:44,742 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:52:44,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-12-14 10:52:44,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:44,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:52:44,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:52:44,959 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:52:44,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 10:52:45,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:52:45,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:52:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:52:45,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [257265661] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:52:45,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6800517] [2022-12-14 10:52:45,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:45,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:52:45,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:52:45,078 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:52:45,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 10:52:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:45,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 10:52:45,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:52:45,238 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:52:45,238 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 [2022-12-14 10:52:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:52:45,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:52:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:52:45,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6800517] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:52:45,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:52:45,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 7 [2022-12-14 10:52:45,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933234612] [2022-12-14 10:52:45,390 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:52:45,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 10:52:45,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:52:45,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 10:52:45,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-14 10:52:45,391 INFO L87 Difference]: Start difference. First operand 2817 states and 10889 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) [2022-12-14 10:52:47,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:52:48,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:52:50,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:50,681 INFO L93 Difference]: Finished difference Result 11255 states and 43547 transitions. [2022-12-14 10:52:50,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 10:52:50,683 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 [2022-12-14 10:52:50,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:50,734 INFO L225 Difference]: With dead ends: 11255 [2022-12-14 10:52:50,734 INFO L226 Difference]: Without dead ends: 11255 [2022-12-14 10:52:50,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-12-14 10:52:50,735 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 335 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:50,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 32 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-12-14 10:52:50,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11255 states. [2022-12-14 10:52:50,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11255 to 2828. [2022-12-14 10:52:50,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2376 states have (on average 4.601851851851852) internal successors, (10934), 2827 states have internal predecessors, (10934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:52:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 10934 transitions. [2022-12-14 10:52:50,905 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 10934 transitions. Word has length 3 [2022-12-14 10:52:50,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:50,906 INFO L495 AbstractCegarLoop]: Abstraction has 2828 states and 10934 transitions. [2022-12-14 10:52:50,906 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) [2022-12-14 10:52:50,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 10934 transitions. [2022-12-14 10:52:50,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 10:52:50,906 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:50,906 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 10:52:50,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 10:52:51,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 10:52:51,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2022-12-14 10:52:51,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:52:51,509 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:52:51,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:51,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1375893566, now seen corresponding path program 1 times [2022-12-14 10:52:51,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:52:51,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819486950] [2022-12-14 10:52:51,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:51,513 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:52:51,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:52:51,515 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:52:51,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-14 10:52:51,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:51,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 10:52:51,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:52:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:52:51,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:52:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:52:51,740 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:52:51,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819486950] [2022-12-14 10:52:51,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819486950] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:52:51,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [467119351] [2022-12-14 10:52:51,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:51,741 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:52:51,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:52:51,741 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:52:51,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-12-14 10:52:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:51,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 10:52:51,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:52:51,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:52:51,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:52:51,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:52:51,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [467119351] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:52:51,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769222947] [2022-12-14 10:52:51,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:52:51,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:52:51,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:52:51,950 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:52:51,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 10:52:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:52:52,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 10:52:52,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:52:52,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:52:52,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:52:52,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769222947] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:52:52,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-12-14 10:52:52,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4, 4, 4] total 13 [2022-12-14 10:52:52,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232935904] [2022-12-14 10:52:52,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:52:52,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:52:52,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:52:52,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:52:52,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-12-14 10:52:52,044 INFO L87 Difference]: Start difference. First operand 2828 states and 10934 transitions. Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:52:52,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:52:52,400 INFO L93 Difference]: Finished difference Result 2828 states and 10926 transitions. [2022-12-14 10:52:52,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:52:52,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 10:52:52,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:52:52,411 INFO L225 Difference]: With dead ends: 2828 [2022-12-14 10:52:52,411 INFO L226 Difference]: Without dead ends: 2828 [2022-12-14 10:52:52,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-12-14 10:52:52,412 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 66 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:52:52,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 10 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:52:52,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2828 states. [2022-12-14 10:52:52,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2828 to 2828. [2022-12-14 10:52:52,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2376 states have (on average 4.598484848484849) internal successors, (10926), 2827 states have internal predecessors, (10926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:52:52,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 10926 transitions. [2022-12-14 10:52:52,472 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 10926 transitions. Word has length 5 [2022-12-14 10:52:52,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:52:52,472 INFO L495 AbstractCegarLoop]: Abstraction has 2828 states and 10926 transitions. [2022-12-14 10:52:52,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:52:52,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 10926 transitions. [2022-12-14 10:52:52,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 10:52:52,473 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:52:52,473 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 10:52:52,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 10:52:52,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-14 10:52:52,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-12-14 10:52:53,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:52:53,077 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:52:53,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:52:53,078 INFO L85 PathProgramCache]: Analyzing trace with hash -299872681, now seen corresponding path program 2 times [2022-12-14 10:52:53,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:52:53,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876021389] [2022-12-14 10:52:53,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:52:53,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:52:53,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:52:53,083 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:52:53,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-14 10:52:53,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:52:53,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:52:53,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 10:52:53,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:52:53,279 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:52:53,280 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 [2022-12-14 10:52:53,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:52:53,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:52:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:52:54,130 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:52:54,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876021389] [2022-12-14 10:52:54,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1876021389] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:52:54,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1683005317] [2022-12-14 10:52:54,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:52:54,131 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:52:54,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:52:54,132 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:52:54,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-12-14 10:52:54,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:52:54,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:52:54,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 10:52:54,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:52:54,399 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:52:54,399 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 [2022-12-14 10:52:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:52:54,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:52:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:52:54,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1683005317] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:52:54,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273129857] [2022-12-14 10:52:54,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:52:54,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:52:54,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:52:54,618 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:52:54,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 10:52:54,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:52:54,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:52:54,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 10:52:54,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:52:54,812 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:52:54,812 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 [2022-12-14 10:52:54,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:52:54,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:52:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:52:55,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273129857] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:52:55,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:52:55,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2022-12-14 10:52:55,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610236015] [2022-12-14 10:52:55,120 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:52:55,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 10:52:55,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:52:55,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 10:52:55,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-12-14 10:52:55,121 INFO L87 Difference]: Start difference. First operand 2828 states and 10926 transitions. Second operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:52:59,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:53:01,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:53:03,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:53:05,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:53:07,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:53:09,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:53:10,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:53:12,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:53:17,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:53:17,288 INFO L93 Difference]: Finished difference Result 19693 states and 76192 transitions. [2022-12-14 10:53:17,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 10:53:17,290 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 10:53:17,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:53:17,385 INFO L225 Difference]: With dead ends: 19693 [2022-12-14 10:53:17,385 INFO L226 Difference]: Without dead ends: 19693 [2022-12-14 10:53:17,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2022-12-14 10:53:17,386 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 791 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 133 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1849 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.7s IncrementalHoareTripleChecker+Time [2022-12-14 10:53:17,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 124 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1849 Invalid, 6 Unknown, 0 Unchecked, 20.7s Time] [2022-12-14 10:53:17,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19693 states. [2022-12-14 10:53:17,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19693 to 2839. [2022-12-14 10:53:17,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2839 states, 2387 states have (on average 4.594051110180143) internal successors, (10966), 2838 states have internal predecessors, (10966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:53:17,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2839 states to 2839 states and 10966 transitions. [2022-12-14 10:53:17,594 INFO L78 Accepts]: Start accepts. Automaton has 2839 states and 10966 transitions. Word has length 6 [2022-12-14 10:53:17,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:53:17,594 INFO L495 AbstractCegarLoop]: Abstraction has 2839 states and 10966 transitions. [2022-12-14 10:53:17,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:53:17,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2839 states and 10966 transitions. [2022-12-14 10:53:17,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 10:53:17,594 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:53:17,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:53:17,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2022-12-14 10:53:17,808 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-14 10:53:18,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 10:53:18,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:53:18,198 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:53:18,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:53:18,199 INFO L85 PathProgramCache]: Analyzing trace with hash -618903385, now seen corresponding path program 1 times [2022-12-14 10:53:18,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:53:18,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771180158] [2022-12-14 10:53:18,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:18,201 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:53:18,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:53:18,204 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:53:18,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-12-14 10:53:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:18,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 10:53:18,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:53:18,490 INFO L321 Elim1Store]: treesize reduction 103, result has 24.8 percent of original size [2022-12-14 10:53:18,491 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 59 [2022-12-14 10:53:18,596 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-12-14 10:53:18,597 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 3 case distinctions, treesize of input 35 treesize of output 64 [2022-12-14 10:53:18,797 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-12-14 10:53:18,798 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 3 case distinctions, treesize of input 47 treesize of output 76 [2022-12-14 10:53:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:53:19,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:53:19,139 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:53:19,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771180158] [2022-12-14 10:53:19,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771180158] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:53:19,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:53:19,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:53:19,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78410802] [2022-12-14 10:53:19,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:53:19,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:53:19,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:53:19,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:53:19,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:53:19,141 INFO L87 Difference]: Start difference. First operand 2839 states and 10966 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:53:19,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:53:19,696 INFO L93 Difference]: Finished difference Result 2838 states and 10959 transitions. [2022-12-14 10:53:19,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:53:19,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 10:53:19,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:53:19,706 INFO L225 Difference]: With dead ends: 2838 [2022-12-14 10:53:19,706 INFO L226 Difference]: Without dead ends: 2838 [2022-12-14 10:53:19,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:53:19,706 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 164 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:53:19,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 3 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:53:19,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2022-12-14 10:53:19,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 2838. [2022-12-14 10:53:19,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2838 states, 2387 states have (on average 4.591118558860495) internal successors, (10959), 2837 states have internal predecessors, (10959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:53:19,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2838 states to 2838 states and 10959 transitions. [2022-12-14 10:53:19,756 INFO L78 Accepts]: Start accepts. Automaton has 2838 states and 10959 transitions. Word has length 7 [2022-12-14 10:53:19,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:53:19,756 INFO L495 AbstractCegarLoop]: Abstraction has 2838 states and 10959 transitions. [2022-12-14 10:53:19,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:53:19,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2838 states and 10959 transitions. [2022-12-14 10:53:19,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 10:53:19,757 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:53:19,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:53:19,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-12-14 10:53:19,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:53:19,957 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:53:19,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:53:19,958 INFO L85 PathProgramCache]: Analyzing trace with hash -618903384, now seen corresponding path program 1 times [2022-12-14 10:53:19,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:53:19,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923633612] [2022-12-14 10:53:19,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:19,959 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:53:19,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:53:19,960 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:53:19,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-14 10:53:20,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:20,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 10:53:20,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:53:20,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:53:20,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:53:20,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:53:20,227 INFO L321 Elim1Store]: treesize reduction 36, result has 43.8 percent of original size [2022-12-14 10:53:20,227 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 [2022-12-14 10:53:20,255 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 10:53:20,255 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 [2022-12-14 10:53:20,385 INFO L321 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-12-14 10:53:20,385 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 3 case distinctions, treesize of input 25 treesize of output 30 [2022-12-14 10:53:20,486 INFO L321 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2022-12-14 10:53:20,486 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 3 case distinctions, treesize of input 21 treesize of output 26 [2022-12-14 10:53:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:53:20,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:53:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:53:20,968 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:53:20,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923633612] [2022-12-14 10:53:20,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923633612] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:53:20,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1274324471] [2022-12-14 10:53:20,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:20,969 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:53:20,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:53:20,970 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:53:20,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-12-14 10:53:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:21,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 10:53:21,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:53:21,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:53:21,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:53:21,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:53:21,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:53:21,397 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 10:53:21,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-12-14 10:53:21,421 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 10:53:21,421 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 [2022-12-14 10:53:21,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:53:21,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 10:53:21,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:53:21,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 10:53:21,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:53:21,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:53:21,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1274324471] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:53:21,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:53:21,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4] total 10 [2022-12-14 10:53:21,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511753944] [2022-12-14 10:53:21,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:53:21,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:53:21,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:53:21,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:53:21,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-12-14 10:53:21,580 INFO L87 Difference]: Start difference. First operand 2838 states and 10959 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:53:21,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:53:21,874 INFO L93 Difference]: Finished difference Result 2297 states and 8594 transitions. [2022-12-14 10:53:21,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:53:21,875 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 10:53:21,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:53:21,883 INFO L225 Difference]: With dead ends: 2297 [2022-12-14 10:53:21,883 INFO L226 Difference]: Without dead ends: 2297 [2022-12-14 10:53:21,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-12-14 10:53:21,883 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 58 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:53:21,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 4 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:53:21,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2022-12-14 10:53:21,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 2297. [2022-12-14 10:53:21,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2297 states, 1952 states have (on average 4.402663934426229) internal successors, (8594), 2296 states have internal predecessors, (8594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:53:21,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2297 states to 2297 states and 8594 transitions. [2022-12-14 10:53:21,921 INFO L78 Accepts]: Start accepts. Automaton has 2297 states and 8594 transitions. Word has length 7 [2022-12-14 10:53:21,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:53:21,921 INFO L495 AbstractCegarLoop]: Abstraction has 2297 states and 8594 transitions. [2022-12-14 10:53:21,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:53:21,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2297 states and 8594 transitions. [2022-12-14 10:53:21,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 10:53:21,921 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:53:21,921 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:53:21,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-12-14 10:53:22,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-14 10:53:22,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:53:22,324 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:53:22,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:53:22,325 INFO L85 PathProgramCache]: Analyzing trace with hash -618903430, now seen corresponding path program 1 times [2022-12-14 10:53:22,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:53:22,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2145939828] [2022-12-14 10:53:22,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:22,327 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:53:22,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:53:22,330 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:53:22,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-12-14 10:53:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:22,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 10:53:22,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:53:22,550 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 10:53:22,550 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 [2022-12-14 10:53:22,573 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 10:53:22,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 10:53:22,593 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 10:53:22,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 10:53:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:53:22,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:53:22,604 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:53:22,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2145939828] [2022-12-14 10:53:22,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2145939828] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:53:22,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:53:22,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:53:22,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194040981] [2022-12-14 10:53:22,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:53:22,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:53:22,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:53:22,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:53:22,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:53:22,606 INFO L87 Difference]: Start difference. First operand 2297 states and 8594 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:53:22,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:53:22,886 INFO L93 Difference]: Finished difference Result 1872 states and 7001 transitions. [2022-12-14 10:53:22,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:53:22,887 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 10:53:22,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:53:22,892 INFO L225 Difference]: With dead ends: 1872 [2022-12-14 10:53:22,892 INFO L226 Difference]: Without dead ends: 1872 [2022-12-14 10:53:22,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:53:22,893 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 109 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:53:22,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 4 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:53:22,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2022-12-14 10:53:22,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1872. [2022-12-14 10:53:22,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1624 states have (on average 4.310960591133005) internal successors, (7001), 1871 states have internal predecessors, (7001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:53:22,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 7001 transitions. [2022-12-14 10:53:22,930 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 7001 transitions. Word has length 7 [2022-12-14 10:53:22,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:53:22,930 INFO L495 AbstractCegarLoop]: Abstraction has 1872 states and 7001 transitions. [2022-12-14 10:53:22,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:53:22,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 7001 transitions. [2022-12-14 10:53:22,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 10:53:22,930 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:53:22,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:53:22,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-12-14 10:53:23,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:53:23,132 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:53:23,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:53:23,133 INFO L85 PathProgramCache]: Analyzing trace with hash -618903429, now seen corresponding path program 1 times [2022-12-14 10:53:23,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:53:23,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137723319] [2022-12-14 10:53:23,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:23,133 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:53:23,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:53:23,135 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:53:23,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-14 10:53:23,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:23,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 10:53:23,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:53:23,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:53:23,326 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 10:53:23,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 10:53:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:53:23,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:53:23,340 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:53:23,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137723319] [2022-12-14 10:53:23,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137723319] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:53:23,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:53:23,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:53:23,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047093227] [2022-12-14 10:53:23,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:53:23,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:53:23,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:53:23,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:53:23,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:53:23,341 INFO L87 Difference]: Start difference. First operand 1872 states and 7001 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:53:23,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:53:23,633 INFO L93 Difference]: Finished difference Result 1491 states and 5570 transitions. [2022-12-14 10:53:23,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:53:23,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 10:53:23,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:53:23,638 INFO L225 Difference]: With dead ends: 1491 [2022-12-14 10:53:23,639 INFO L226 Difference]: Without dead ends: 1491 [2022-12-14 10:53:23,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:53:23,639 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 102 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:53:23,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 3 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:53:23,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2022-12-14 10:53:23,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1491. [2022-12-14 10:53:23,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1324 states have (on average 4.206948640483383) internal successors, (5570), 1490 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:53:23,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 5570 transitions. [2022-12-14 10:53:23,660 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 5570 transitions. Word has length 7 [2022-12-14 10:53:23,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:53:23,660 INFO L495 AbstractCegarLoop]: Abstraction has 1491 states and 5570 transitions. [2022-12-14 10:53:23,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:53:23,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 5570 transitions. [2022-12-14 10:53:23,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 10:53:23,660 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:53:23,660 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:53:23,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-12-14 10:53:23,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:53:23,862 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:53:23,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:53:23,863 INFO L85 PathProgramCache]: Analyzing trace with hash -618903428, now seen corresponding path program 1 times [2022-12-14 10:53:23,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:53:23,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1916244906] [2022-12-14 10:53:23,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:23,864 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:53:23,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:53:23,867 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:53:23,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-14 10:53:24,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:24,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 10:53:24,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:53:24,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 10:53:24,089 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-14 10:53:24,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 10:53:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:53:24,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:53:24,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:53:24,354 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:53:24,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1916244906] [2022-12-14 10:53:24,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1916244906] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:53:24,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [472353835] [2022-12-14 10:53:24,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:24,355 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:53:24,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:53:24,356 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:53:24,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-12-14 10:53:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:24,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 10:53:24,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:53:24,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:53:24,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 10:53:24,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:53:24,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 10:53:24,712 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:53:24,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 10:53:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:53:24,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:53:24,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:53:25,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:53:25,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [472353835] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:53:25,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687075145] [2022-12-14 10:53:25,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:25,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:53:25,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:53:25,026 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:53:25,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 10:53:25,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:25,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:53:25,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:53:25,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 10:53:25,230 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-14 10:53:25,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 10:53:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:53:25,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:53:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:53:27,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687075145] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:53:27,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:53:27,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 21 [2022-12-14 10:53:27,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906639933] [2022-12-14 10:53:27,799 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:53:27,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 10:53:27,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:53:27,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 10:53:27,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=381, Unknown=1, NotChecked=0, Total=462 [2022-12-14 10:53:27,800 INFO L87 Difference]: Start difference. First operand 1491 states and 5570 transitions. Second operand has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:53:46,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:53:46,979 INFO L93 Difference]: Finished difference Result 2954 states and 11071 transitions. [2022-12-14 10:53:46,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 10:53:46,980 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 10:53:46,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:53:46,992 INFO L225 Difference]: With dead ends: 2954 [2022-12-14 10:53:46,992 INFO L226 Difference]: Without dead ends: 2954 [2022-12-14 10:53:46,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=270, Invalid=785, Unknown=1, NotChecked=0, Total=1056 [2022-12-14 10:53:46,993 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 708 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:53:46,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [708 Valid, 30 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-12-14 10:53:46,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2022-12-14 10:53:47,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 1494. [2022-12-14 10:53:47,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1328 states have (on average 4.192771084337349) internal successors, (5568), 1493 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:53:47,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 5568 transitions. [2022-12-14 10:53:47,026 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 5568 transitions. Word has length 7 [2022-12-14 10:53:47,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:53:47,026 INFO L495 AbstractCegarLoop]: Abstraction has 1494 states and 5568 transitions. [2022-12-14 10:53:47,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:53:47,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 5568 transitions. [2022-12-14 10:53:47,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 10:53:47,027 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:53:47,027 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:53:47,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-14 10:53:47,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2022-12-14 10:53:47,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-14 10:53:47,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:53:47,630 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:53:47,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:53:47,632 INFO L85 PathProgramCache]: Analyzing trace with hash -618903427, now seen corresponding path program 1 times [2022-12-14 10:53:47,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:53:47,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932457912] [2022-12-14 10:53:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:47,634 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:53:47,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:53:47,636 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:53:47,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-14 10:53:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:47,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 10:53:47,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:53:47,891 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:53:47,891 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 [2022-12-14 10:53:48,007 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 10:53:48,007 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 [2022-12-14 10:53:48,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:53:48,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 10:53:48,156 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:53:48,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 10:53:48,209 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-14 10:53:48,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 10:53:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:53:48,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:53:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:53:54,698 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:53:54,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932457912] [2022-12-14 10:53:54,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932457912] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:53:54,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2125884993] [2022-12-14 10:53:54,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:54,698 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:53:54,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:53:54,699 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:53:54,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-12-14 10:53:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:54,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 10:53:54,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:53:54,991 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:53:54,991 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 [2022-12-14 10:53:55,116 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 10:53:55,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-12-14 10:53:55,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:53:55,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 10:53:55,265 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:53:55,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 10:53:55,365 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2022-12-14 10:53:55,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2022-12-14 10:53:55,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:53:55,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:53:58,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:53:58,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2125884993] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:53:58,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640629984] [2022-12-14 10:53:58,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:53:58,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:53:58,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:53:58,441 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:53:58,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 10:53:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:53:58,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:53:58,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:53:58,626 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:53:58,627 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 [2022-12-14 10:53:58,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:53:58,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 10:53:58,763 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:53:58,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 10:53:58,838 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-14 10:53:58,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 10:53:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:53:58,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:53:59,883 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 10:53:59,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 68 [2022-12-14 10:54:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 10:54:02,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640629984] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:54:02,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:54:02,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 5] total 24 [2022-12-14 10:54:02,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923279083] [2022-12-14 10:54:02,214 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:54:02,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 10:54:02,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:54:02,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 10:54:02,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=525, Unknown=1, NotChecked=0, Total=650 [2022-12-14 10:54:02,216 INFO L87 Difference]: Start difference. First operand 1494 states and 5568 transitions. Second operand has 26 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:54:07,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:54:07,067 INFO L93 Difference]: Finished difference Result 4411 states and 16566 transitions. [2022-12-14 10:54:07,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 10:54:07,069 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 10:54:07,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:54:07,081 INFO L225 Difference]: With dead ends: 4411 [2022-12-14 10:54:07,081 INFO L226 Difference]: Without dead ends: 4411 [2022-12-14 10:54:07,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=290, Invalid=831, Unknown=1, NotChecked=0, Total=1122 [2022-12-14 10:54:07,081 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1139 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1139 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:54:07,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1139 Valid, 27 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 10:54:07,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4411 states. [2022-12-14 10:54:07,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4411 to 1493. [2022-12-14 10:54:07,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1493 states, 1328 states have (on average 4.186746987951807) internal successors, (5560), 1492 states have internal predecessors, (5560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:54:07,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 5560 transitions. [2022-12-14 10:54:07,124 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 5560 transitions. Word has length 7 [2022-12-14 10:54:07,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:54:07,124 INFO L495 AbstractCegarLoop]: Abstraction has 1493 states and 5560 transitions. [2022-12-14 10:54:07,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:54:07,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 5560 transitions. [2022-12-14 10:54:07,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 10:54:07,124 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:54:07,124 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:54:07,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-14 10:54:07,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2022-12-14 10:54:07,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 10:54:07,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:54:07,728 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:54:07,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:54:07,730 INFO L85 PathProgramCache]: Analyzing trace with hash -2060632051, now seen corresponding path program 1 times [2022-12-14 10:54:07,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:54:07,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [246787031] [2022-12-14 10:54:07,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:07,733 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:54:07,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:54:07,734 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:54:07,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-12-14 10:54:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:07,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 10:54:07,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:54:07,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:54:07,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:54:08,008 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-12-14 10:54:08,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-12-14 10:54:08,024 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 14 treesize of output 12 [2022-12-14 10:54:08,137 INFO L321 Elim1Store]: treesize reduction 25, result has 46.8 percent of original size [2022-12-14 10:54:08,137 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 3 case distinctions, treesize of input 23 treesize of output 39 [2022-12-14 10:54:08,203 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-14 10:54:08,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2022-12-14 10:54:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:54:08,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:54:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:54:09,201 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:54:09,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [246787031] [2022-12-14 10:54:09,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [246787031] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:54:09,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1372648668] [2022-12-14 10:54:09,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:09,202 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:54:09,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:54:09,202 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:54:09,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-12-14 10:54:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:09,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 10:54:09,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:54:09,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:54:09,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:54:09,604 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-12-14 10:54:09,605 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 [2022-12-14 10:54:09,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-12-14 10:54:09,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:54:09,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 10:54:09,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:54:09,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 10:54:09,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:54:09,778 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:54:09,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1372648668] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:54:09,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:54:09,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 5] total 12 [2022-12-14 10:54:09,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044294134] [2022-12-14 10:54:09,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:54:09,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:54:09,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:54:09,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:54:09,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-12-14 10:54:09,779 INFO L87 Difference]: Start difference. First operand 1493 states and 5560 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:54:10,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:54:10,001 INFO L93 Difference]: Finished difference Result 1443 states and 5409 transitions. [2022-12-14 10:54:10,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:54:10,002 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 10:54:10,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:54:10,006 INFO L225 Difference]: With dead ends: 1443 [2022-12-14 10:54:10,006 INFO L226 Difference]: Without dead ends: 1443 [2022-12-14 10:54:10,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-12-14 10:54:10,006 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:54:10,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 3 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:54:10,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2022-12-14 10:54:10,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1443. [2022-12-14 10:54:10,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 1296 states have (on average 4.173611111111111) internal successors, (5409), 1442 states have internal predecessors, (5409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:54:10,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 5409 transitions. [2022-12-14 10:54:10,025 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 5409 transitions. Word has length 9 [2022-12-14 10:54:10,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:54:10,026 INFO L495 AbstractCegarLoop]: Abstraction has 1443 states and 5409 transitions. [2022-12-14 10:54:10,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:54:10,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 5409 transitions. [2022-12-14 10:54:10,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 10:54:10,026 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:54:10,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:54:10,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-12-14 10:54:10,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-12-14 10:54:10,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:54:10,429 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:54:10,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:54:10,430 INFO L85 PathProgramCache]: Analyzing trace with hash -2060632050, now seen corresponding path program 1 times [2022-12-14 10:54:10,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:54:10,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146962934] [2022-12-14 10:54:10,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:10,431 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:54:10,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:54:10,434 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:54:10,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-14 10:54:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:10,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 10:54:10,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:54:10,682 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-12-14 10:54:10,682 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 52 [2022-12-14 10:54:10,819 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-12-14 10:54:10,820 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 3 case distinctions, treesize of input 39 treesize of output 68 [2022-12-14 10:54:11,042 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-12-14 10:54:11,043 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 3 case distinctions, treesize of input 51 treesize of output 80 [2022-12-14 10:54:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:54:11,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:54:11,359 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:54:11,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146962934] [2022-12-14 10:54:11,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146962934] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:54:11,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:54:11,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:54:11,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799095919] [2022-12-14 10:54:11,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:54:11,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:54:11,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:54:11,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:54:11,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:54:11,361 INFO L87 Difference]: Start difference. First operand 1443 states and 5409 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:54:11,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:54:11,572 INFO L93 Difference]: Finished difference Result 1393 states and 5258 transitions. [2022-12-14 10:54:11,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:54:11,573 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 10:54:11,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:54:11,576 INFO L225 Difference]: With dead ends: 1393 [2022-12-14 10:54:11,576 INFO L226 Difference]: Without dead ends: 1393 [2022-12-14 10:54:11,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:54:11,576 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 91 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:54:11,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 4 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:54:11,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2022-12-14 10:54:11,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1393. [2022-12-14 10:54:11,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1264 states have (on average 4.159810126582278) internal successors, (5258), 1392 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:54:11,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 5258 transitions. [2022-12-14 10:54:11,596 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 5258 transitions. Word has length 9 [2022-12-14 10:54:11,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:54:11,596 INFO L495 AbstractCegarLoop]: Abstraction has 1393 states and 5258 transitions. [2022-12-14 10:54:11,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:54:11,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 5258 transitions. [2022-12-14 10:54:11,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 10:54:11,597 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:54:11,597 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:54:11,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-14 10:54:11,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:54:11,798 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:54:11,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:54:11,800 INFO L85 PathProgramCache]: Analyzing trace with hash 544905788, now seen corresponding path program 1 times [2022-12-14 10:54:11,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:54:11,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [522408734] [2022-12-14 10:54:11,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:11,801 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:54:11,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:54:11,804 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:54:11,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-14 10:54:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:11,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:54:11,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:54:12,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:54:12,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:54:12,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:54:12,101 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:54:12,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [522408734] [2022-12-14 10:54:12,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [522408734] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:54:12,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [802762506] [2022-12-14 10:54:12,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:12,101 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:54:12,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:54:12,102 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:54:12,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-12-14 10:54:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:12,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 10:54:12,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:54:12,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:54:12,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:54:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:54:12,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [802762506] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:54:12,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92632888] [2022-12-14 10:54:12,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:12,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:54:12,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:54:12,378 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:54:12,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 10:54:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:12,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 10:54:12,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:54:12,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:54:12,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:54:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:54:12,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92632888] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:54:12,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:54:12,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 5] total 14 [2022-12-14 10:54:12,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976492829] [2022-12-14 10:54:12,579 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:54:12,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 10:54:12,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:54:12,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 10:54:12,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-12-14 10:54:12,580 INFO L87 Difference]: Start difference. First operand 1393 states and 5258 transitions. Second operand has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:54:14,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:54:14,002 INFO L93 Difference]: Finished difference Result 1972 states and 7136 transitions. [2022-12-14 10:54:14,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 10:54:14,003 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 10:54:14,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:54:14,008 INFO L225 Difference]: With dead ends: 1972 [2022-12-14 10:54:14,008 INFO L226 Difference]: Without dead ends: 1972 [2022-12-14 10:54:14,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2022-12-14 10:54:14,008 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 237 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:54:14,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 46 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 10:54:14,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1972 states. [2022-12-14 10:54:14,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1972 to 1706. [2022-12-14 10:54:14,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1706 states, 1577 states have (on average 4.058972733037413) internal successors, (6401), 1705 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:54:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 6401 transitions. [2022-12-14 10:54:14,035 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 6401 transitions. Word has length 10 [2022-12-14 10:54:14,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:54:14,036 INFO L495 AbstractCegarLoop]: Abstraction has 1706 states and 6401 transitions. [2022-12-14 10:54:14,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:54:14,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 6401 transitions. [2022-12-14 10:54:14,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 10:54:14,036 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:54:14,036 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 1, 1, 1] [2022-12-14 10:54:14,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2022-12-14 10:54:14,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-12-14 10:54:14,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-14 10:54:14,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:54:14,639 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:54:14,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:54:14,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1449017503, now seen corresponding path program 1 times [2022-12-14 10:54:14,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:54:14,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [396562397] [2022-12-14 10:54:14,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:14,641 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:54:14,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:54:14,644 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:54:14,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-12-14 10:54:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:14,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 10:54:14,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:54:14,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 10:54:14,942 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:54:14,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:54:16,076 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:54:16,076 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:54:16,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [396562397] [2022-12-14 10:54:16,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [396562397] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:54:16,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [743087138] [2022-12-14 10:54:16,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:16,077 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:54:16,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:54:16,078 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:54:16,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-12-14 10:54:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:16,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 10:54:16,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:54:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:54:16,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:54:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:54:17,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [743087138] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:54:17,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840691435] [2022-12-14 10:54:17,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:17,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:54:17,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:54:17,189 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:54:17,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 10:54:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:17,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 10:54:17,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:54:17,424 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:54:17,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:54:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:54:17,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840691435] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:54:17,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:54:17,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 7, 7, 7, 7] total 32 [2022-12-14 10:54:17,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220761834] [2022-12-14 10:54:17,587 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:54:17,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 10:54:17,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:54:17,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 10:54:17,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 10:54:17,588 INFO L87 Difference]: Start difference. First operand 1706 states and 6401 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:54:25,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:54:42,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:54:42,947 INFO L93 Difference]: Finished difference Result 14022 states and 52532 transitions. [2022-12-14 10:54:42,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 10:54:42,948 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 10:54:42,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:54:43,003 INFO L225 Difference]: With dead ends: 14022 [2022-12-14 10:54:43,003 INFO L226 Difference]: Without dead ends: 14022 [2022-12-14 10:54:43,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=436, Invalid=2426, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 10:54:43,004 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 2522 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 3968 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2522 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 4179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 3968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:54:43,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2522 Valid, 276 Invalid, 4179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 3968 Invalid, 0 Unknown, 0 Unchecked, 22.4s Time] [2022-12-14 10:54:43,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14022 states. [2022-12-14 10:54:43,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14022 to 1716. [2022-12-14 10:54:43,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1587 states have (on average 4.041587901701323) internal successors, (6414), 1715 states have internal predecessors, (6414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:54:43,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 6414 transitions. [2022-12-14 10:54:43,092 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 6414 transitions. Word has length 11 [2022-12-14 10:54:43,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:54:43,092 INFO L495 AbstractCegarLoop]: Abstraction has 1716 states and 6414 transitions. [2022-12-14 10:54:43,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:54:43,092 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 6414 transitions. [2022-12-14 10:54:43,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 10:54:43,093 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:54:43,093 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:54:43,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-14 10:54:43,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-12-14 10:54:43,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-12-14 10:54:43,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:54:43,695 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:54:43,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:54:43,696 INFO L85 PathProgramCache]: Analyzing trace with hash -287446374, now seen corresponding path program 1 times [2022-12-14 10:54:43,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:54:43,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [949889220] [2022-12-14 10:54:43,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:43,698 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:54:43,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:54:43,701 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:54:43,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-12-14 10:54:43,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:43,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 10:54:43,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:54:43,983 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 10:54:43,983 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 [2022-12-14 10:54:44,014 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 10:54:44,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-12-14 10:54:44,056 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 10:54:44,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 31 [2022-12-14 10:54:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:54:44,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:54:44,138 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:54:44,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [949889220] [2022-12-14 10:54:44,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [949889220] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:54:44,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:54:44,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 10:54:44,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446235820] [2022-12-14 10:54:44,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:54:44,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 10:54:44,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:54:44,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 10:54:44,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:54:44,139 INFO L87 Difference]: Start difference. First operand 1716 states and 6414 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:54:44,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:54:44,369 INFO L93 Difference]: Finished difference Result 1640 states and 6177 transitions. [2022-12-14 10:54:44,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:54:44,370 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 10:54:44,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:54:44,374 INFO L225 Difference]: With dead ends: 1640 [2022-12-14 10:54:44,374 INFO L226 Difference]: Without dead ends: 1640 [2022-12-14 10:54:44,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:54:44,375 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 124 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:54:44,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 4 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:54:44,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2022-12-14 10:54:44,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1640. [2022-12-14 10:54:44,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1529 states have (on average 4.039895356442119) internal successors, (6177), 1639 states have internal predecessors, (6177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:54:44,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 6177 transitions. [2022-12-14 10:54:44,397 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 6177 transitions. Word has length 11 [2022-12-14 10:54:44,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:54:44,397 INFO L495 AbstractCegarLoop]: Abstraction has 1640 states and 6177 transitions. [2022-12-14 10:54:44,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:54:44,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 6177 transitions. [2022-12-14 10:54:44,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 10:54:44,398 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:54:44,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:54:44,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-12-14 10:54:44,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:54:44,599 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:54:44,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:54:44,600 INFO L85 PathProgramCache]: Analyzing trace with hash -287446373, now seen corresponding path program 1 times [2022-12-14 10:54:44,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:54:44,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946590656] [2022-12-14 10:54:44,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:44,602 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:54:44,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:54:44,605 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:54:44,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-12-14 10:54:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:44,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 10:54:44,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:54:44,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:54:44,942 INFO L321 Elim1Store]: treesize reduction 66, result has 29.8 percent of original size [2022-12-14 10:54:44,943 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 17 treesize of output 40 [2022-12-14 10:54:44,963 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 130 treesize of output 126 [2022-12-14 10:54:45,077 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2022-12-14 10:54:45,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2022-12-14 10:54:45,169 INFO L321 Elim1Store]: treesize reduction 64, result has 20.0 percent of original size [2022-12-14 10:54:45,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 28 treesize of output 36 [2022-12-14 10:54:45,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:54:45,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:54:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:54:45,833 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:54:45,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [946590656] [2022-12-14 10:54:45,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [946590656] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:54:45,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1297950395] [2022-12-14 10:54:45,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:54:45,833 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:54:45,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:54:45,834 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:54:45,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-12-14 10:54:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:54:46,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 10:54:46,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:54:46,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:54:46,304 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-14 10:54:46,304 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 [2022-12-14 10:54:46,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:54:46,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 10:54:46,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:54:46,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 10:54:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:54:46,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:54:46,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1297950395] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:54:46,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 10:54:46,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4] total 10 [2022-12-14 10:54:46,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274332244] [2022-12-14 10:54:46,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:54:46,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:54:46,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:54:46,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:54:46,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 10:54:46,477 INFO L87 Difference]: Start difference. First operand 1640 states and 6177 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:54:46,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:54:46,696 INFO L93 Difference]: Finished difference Result 1564 states and 5940 transitions. [2022-12-14 10:54:46,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:54:46,697 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-12-14 10:54:46,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:54:46,701 INFO L225 Difference]: With dead ends: 1564 [2022-12-14 10:54:46,701 INFO L226 Difference]: Without dead ends: 1564 [2022-12-14 10:54:46,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 10:54:46,701 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 79 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:54:46,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 3 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:54:46,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2022-12-14 10:54:46,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 1564. [2022-12-14 10:54:46,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1471 states have (on average 4.038069340584636) internal successors, (5940), 1563 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:54:46,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 5940 transitions. [2022-12-14 10:54:46,724 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 5940 transitions. Word has length 11 [2022-12-14 10:54:46,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:54:46,724 INFO L495 AbstractCegarLoop]: Abstraction has 1564 states and 5940 transitions. [2022-12-14 10:54:46,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:54:46,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 5940 transitions. [2022-12-14 10:54:46,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 10:54:46,724 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:54:46,724 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-12-14 10:54:46,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-12-14 10:54:46,954 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-12-14 10:54:47,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:54:47,126 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:54:47,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:54:47,128 INFO L85 PathProgramCache]: Analyzing trace with hash -402037033, now seen corresponding path program 3 times [2022-12-14 10:54:47,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:54:47,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187004578] [2022-12-14 10:54:47,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:54:47,129 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:54:47,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:54:47,131 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:54:47,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-12-14 10:54:47,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 10:54:47,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:54:47,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 10:54:47,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:54:47,470 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:54:47,471 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 [2022-12-14 10:54:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:54:47,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:54:50,240 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:54:50,240 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:54:50,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187004578] [2022-12-14 10:54:50,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187004578] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:54:50,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [350997321] [2022-12-14 10:54:50,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:54:50,240 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:54:50,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:54:50,241 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:54:50,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-12-14 10:54:50,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 10:54:50,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:54:50,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 10:54:50,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:54:50,967 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:54:50,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 10:54:51,104 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:54:51,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:54:51,391 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:54:51,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [350997321] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:54:51,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639640073] [2022-12-14 10:54:51,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 10:54:51,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:54:51,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:54:51,392 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:54:51,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 10:54:53,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 10:54:53,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:54:53,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 10:54:53,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:54:53,658 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:54:53,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 10:54:54,180 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:54:54,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:54:54,524 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:54:54,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639640073] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:54:54,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:54:54,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 32 [2022-12-14 10:54:54,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670781933] [2022-12-14 10:54:54,524 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:54:54,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 10:54:54,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:54:54,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 10:54:54,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 10:54:54,525 INFO L87 Difference]: Start difference. First operand 1564 states and 5940 transitions. Second operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:55:12,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:55:14,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:55:16,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:55:18,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:55:20,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:55:22,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:55:24,324 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:55:26,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:55:28,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:55:30,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:55:37,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:55:39,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:55:41,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:55:43,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:55:45,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:55:47,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:55:49,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:55:51,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:55:53,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:55:55,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:56:01,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:56:01,662 INFO L93 Difference]: Finished difference Result 14180 states and 54783 transitions. [2022-12-14 10:56:01,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 10:56:01,664 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 10:56:01,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:56:01,704 INFO L225 Difference]: With dead ends: 14180 [2022-12-14 10:56:01,704 INFO L226 Difference]: Without dead ends: 14180 [2022-12-14 10:56:01,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=646, Invalid=1246, Unknown=0, NotChecked=0, Total=1892 [2022-12-14 10:56:01,704 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1875 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 5901 mSolverCounterSat, 519 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1875 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 6440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 5901 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:56:01,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1875 Valid, 444 Invalid, 6440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 5901 Invalid, 20 Unknown, 0 Unchecked, 54.1s Time] [2022-12-14 10:56:01,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14180 states. [2022-12-14 10:56:01,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14180 to 1583. [2022-12-14 10:56:01,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1490 states have (on average 4.012751677852349) internal successors, (5979), 1582 states have internal predecessors, (5979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:56:01,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 5979 transitions. [2022-12-14 10:56:01,800 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 5979 transitions. Word has length 12 [2022-12-14 10:56:01,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:56:01,800 INFO L495 AbstractCegarLoop]: Abstraction has 1583 states and 5979 transitions. [2022-12-14 10:56:01,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:56:01,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 5979 transitions. [2022-12-14 10:56:01,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 10:56:01,800 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:56:01,800 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:56:01,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-12-14 10:56:02,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-14 10:56:02,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-12-14 10:56:02,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:56:02,402 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:56:02,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:56:02,402 INFO L85 PathProgramCache]: Analyzing trace with hash -320913251, now seen corresponding path program 1 times [2022-12-14 10:56:02,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:56:02,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1218924619] [2022-12-14 10:56:02,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:56:02,402 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:56:02,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:56:02,403 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:56:02,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-12-14 10:56:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:56:02,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:56:02,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:56:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:56:02,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:56:02,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:56:02,703 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:56:02,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1218924619] [2022-12-14 10:56:02,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1218924619] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:56:02,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1903305212] [2022-12-14 10:56:02,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:56:02,703 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:56:02,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:56:02,704 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:56:02,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-12-14 10:56:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:56:02,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 10:56:02,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:56:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:56:02,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:56:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:56:03,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1903305212] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:56:03,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836110084] [2022-12-14 10:56:03,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:56:03,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:56:03,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:56:03,009 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:56:03,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 10:56:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:56:03,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 10:56:03,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:56:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:56:03,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:56:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 10:56:03,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836110084] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:56:03,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:56:03,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 5] total 14 [2022-12-14 10:56:03,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264851085] [2022-12-14 10:56:03,209 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:56:03,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 10:56:03,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:56:03,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 10:56:03,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-12-14 10:56:03,210 INFO L87 Difference]: Start difference. First operand 1583 states and 5979 transitions. Second operand has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:56:04,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:56:04,436 INFO L93 Difference]: Finished difference Result 1535 states and 5616 transitions. [2022-12-14 10:56:04,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 10:56:04,437 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 10:56:04,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:56:04,441 INFO L225 Difference]: With dead ends: 1535 [2022-12-14 10:56:04,441 INFO L226 Difference]: Without dead ends: 1535 [2022-12-14 10:56:04,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2022-12-14 10:56:04,441 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 213 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 10:56:04,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 48 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 10:56:04,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2022-12-14 10:56:04,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1489. [2022-12-14 10:56:04,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1396 states have (on average 3.9591690544412605) internal successors, (5527), 1488 states have internal predecessors, (5527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:56:04,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 5527 transitions. [2022-12-14 10:56:04,467 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 5527 transitions. Word has length 12 [2022-12-14 10:56:04,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:56:04,467 INFO L495 AbstractCegarLoop]: Abstraction has 1489 states and 5527 transitions. [2022-12-14 10:56:04,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:56:04,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 5527 transitions. [2022-12-14 10:56:04,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 10:56:04,468 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:56:04,468 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:56:04,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-12-14 10:56:04,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-12-14 10:56:04,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-12-14 10:56:05,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:56:05,070 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:56:05,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:56:05,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1390282095, now seen corresponding path program 2 times [2022-12-14 10:56:05,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:56:05,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [900943090] [2022-12-14 10:56:05,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:56:05,074 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:56:05,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:56:05,075 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:56:05,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-12-14 10:56:05,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 10:56:05,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:56:05,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 10:56:05,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:56:05,303 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:56:05,304 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 [2022-12-14 10:56:05,386 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 10:56:05,386 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 [2022-12-14 10:56:05,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:56:05,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 10:56:05,467 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:56:05,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 10:56:05,511 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-14 10:56:05,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 10:56:05,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 10:56:05,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:56:05,577 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:56:05,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [900943090] [2022-12-14 10:56:05,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [900943090] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:56:05,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:56:05,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:56:05,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795294326] [2022-12-14 10:56:05,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:56:05,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:56:05,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:56:05,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:56:05,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:56:05,579 INFO L87 Difference]: Start difference. First operand 1489 states and 5527 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:56:06,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:56:06,025 INFO L93 Difference]: Finished difference Result 2439 states and 9279 transitions. [2022-12-14 10:56:06,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:56:06,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 10:56:06,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:56:06,032 INFO L225 Difference]: With dead ends: 2439 [2022-12-14 10:56:06,032 INFO L226 Difference]: Without dead ends: 2439 [2022-12-14 10:56:06,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:56:06,032 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 140 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:56:06,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 7 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:56:06,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2439 states. [2022-12-14 10:56:06,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2439 to 1631. [2022-12-14 10:56:06,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1538 states have (on average 4.122236671001301) internal successors, (6340), 1630 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:56:06,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 6340 transitions. [2022-12-14 10:56:06,060 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 6340 transitions. Word has length 13 [2022-12-14 10:56:06,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:56:06,061 INFO L495 AbstractCegarLoop]: Abstraction has 1631 states and 6340 transitions. [2022-12-14 10:56:06,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:56:06,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 6340 transitions. [2022-12-14 10:56:06,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 10:56:06,061 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:56:06,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:56:06,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-12-14 10:56:06,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:56:06,263 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:56:06,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:56:06,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1358027239, now seen corresponding path program 1 times [2022-12-14 10:56:06,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:56:06,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [492100626] [2022-12-14 10:56:06,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:56:06,266 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:56:06,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:56:06,269 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:56:06,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-12-14 10:56:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:56:06,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 10:56:06,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:56:06,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:56:06,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:56:06,445 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:56:06,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [492100626] [2022-12-14 10:56:06,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [492100626] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:56:06,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:56:06,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 10:56:06,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184455894] [2022-12-14 10:56:06,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:56:06,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 10:56:06,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:56:06,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 10:56:06,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:56:06,446 INFO L87 Difference]: Start difference. First operand 1631 states and 6340 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:56:06,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:56:06,659 INFO L93 Difference]: Finished difference Result 1205 states and 4421 transitions. [2022-12-14 10:56:06,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 10:56:06,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 10:56:06,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:56:06,663 INFO L225 Difference]: With dead ends: 1205 [2022-12-14 10:56:06,663 INFO L226 Difference]: Without dead ends: 1205 [2022-12-14 10:56:06,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 10:56:06,663 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:56:06,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 4 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 10:56:06,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2022-12-14 10:56:06,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1205. [2022-12-14 10:56:06,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1157 states have (on average 3.8210890233362145) internal successors, (4421), 1204 states have internal predecessors, (4421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:56:06,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 4421 transitions. [2022-12-14 10:56:06,679 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 4421 transitions. Word has length 13 [2022-12-14 10:56:06,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:56:06,679 INFO L495 AbstractCegarLoop]: Abstraction has 1205 states and 4421 transitions. [2022-12-14 10:56:06,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:56:06,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 4421 transitions. [2022-12-14 10:56:06,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 10:56:06,680 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:56:06,680 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:56:06,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-12-14 10:56:06,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:56:06,881 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:56:06,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:56:06,882 INFO L85 PathProgramCache]: Analyzing trace with hash -149064685, now seen corresponding path program 1 times [2022-12-14 10:56:06,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:56:06,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [434080425] [2022-12-14 10:56:06,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:56:06,884 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:56:06,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:56:06,887 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:56:06,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-12-14 10:56:07,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:56:07,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 10:56:07,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:56:07,514 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:56:07,514 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 [2022-12-14 10:56:07,619 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-14 10:56:07,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-12-14 10:56:07,689 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-14 10:56:07,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 10:56:07,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:56:07,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:56:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:56:08,391 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:56:08,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [434080425] [2022-12-14 10:56:08,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [434080425] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:56:08,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [337519443] [2022-12-14 10:56:08,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:56:08,392 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:56:08,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:56:08,393 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:56:08,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2022-12-14 10:56:08,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:56:08,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 10:56:08,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:56:09,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:56:09,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 10:56:09,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:56:09,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 10:56:09,180 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:56:09,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 10:56:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:56:09,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:56:09,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:56:10,314 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:56:10,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [337519443] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:56:10,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000142267] [2022-12-14 10:56:10,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:56:10,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:56:10,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:56:10,316 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:56:10,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-14 10:56:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:56:10,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 10:56:10,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:56:10,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 10:56:10,624 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-14 10:56:10,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 10:56:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:56:10,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:56:13,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:56:13,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000142267] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:56:13,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:56:13,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 7, 7, 7] total 31 [2022-12-14 10:56:13,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336240823] [2022-12-14 10:56:13,950 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:56:13,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 10:56:13,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:56:13,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 10:56:13,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=851, Unknown=1, NotChecked=0, Total=992 [2022-12-14 10:56:13,951 INFO L87 Difference]: Start difference. First operand 1205 states and 4421 transitions. Second operand has 32 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 32 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:56:25,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:56:25,312 INFO L93 Difference]: Finished difference Result 2942 states and 10794 transitions. [2022-12-14 10:56:25,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 10:56:25,314 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 32 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 10:56:25,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:56:25,321 INFO L225 Difference]: With dead ends: 2942 [2022-12-14 10:56:25,321 INFO L226 Difference]: Without dead ends: 2942 [2022-12-14 10:56:25,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=624, Invalid=2237, Unknown=1, NotChecked=0, Total=2862 [2022-12-14 10:56:25,322 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1369 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1369 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:56:25,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1369 Valid, 92 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-12-14 10:56:25,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2942 states. [2022-12-14 10:56:25,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2942 to 1606. [2022-12-14 10:56:25,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1558 states have (on average 3.8741976893453147) internal successors, (6036), 1605 states have internal predecessors, (6036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:56:25,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 6036 transitions. [2022-12-14 10:56:25,358 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 6036 transitions. Word has length 14 [2022-12-14 10:56:25,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:56:25,359 INFO L495 AbstractCegarLoop]: Abstraction has 1606 states and 6036 transitions. [2022-12-14 10:56:25,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 32 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:56:25,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 6036 transitions. [2022-12-14 10:56:25,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 10:56:25,359 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:56:25,359 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:56:25,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2022-12-14 10:56:25,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-12-14 10:56:25,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2022-12-14 10:56:25,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:56:25,961 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:56:25,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:56:25,962 INFO L85 PathProgramCache]: Analyzing trace with hash 850821175, now seen corresponding path program 1 times [2022-12-14 10:56:25,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:56:25,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2027466225] [2022-12-14 10:56:25,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:56:25,964 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:56:25,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:56:25,967 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:56:25,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-12-14 10:56:26,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:56:26,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 10:56:26,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:56:26,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:56:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:56:26,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:56:26,163 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:56:26,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2027466225] [2022-12-14 10:56:26,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2027466225] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:56:26,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:56:26,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:56:26,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781594683] [2022-12-14 10:56:26,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:56:26,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:56:26,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:56:26,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:56:26,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:56:26,165 INFO L87 Difference]: Start difference. First operand 1606 states and 6036 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:56:26,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:56:26,435 INFO L93 Difference]: Finished difference Result 1222 states and 4546 transitions. [2022-12-14 10:56:26,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:56:26,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 10:56:26,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:56:26,439 INFO L225 Difference]: With dead ends: 1222 [2022-12-14 10:56:26,439 INFO L226 Difference]: Without dead ends: 1222 [2022-12-14 10:56:26,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:56:26,440 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 68 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:56:26,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 4 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 10:56:26,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2022-12-14 10:56:26,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1222. [2022-12-14 10:56:26,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1195 states have (on average 3.8041841004184103) internal successors, (4546), 1221 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:56:26,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4546 transitions. [2022-12-14 10:56:26,455 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4546 transitions. Word has length 14 [2022-12-14 10:56:26,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:56:26,455 INFO L495 AbstractCegarLoop]: Abstraction has 1222 states and 4546 transitions. [2022-12-14 10:56:26,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:56:26,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4546 transitions. [2022-12-14 10:56:26,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 10:56:26,455 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:56:26,456 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:56:26,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-12-14 10:56:26,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:56:26,657 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:56:26,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:56:26,657 INFO L85 PathProgramCache]: Analyzing trace with hash 850821177, now seen corresponding path program 1 times [2022-12-14 10:56:26,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:56:26,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357734189] [2022-12-14 10:56:26,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:56:26,659 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:56:26,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:56:26,662 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:56:26,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-12-14 10:56:26,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:56:26,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 10:56:26,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:56:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:56:26,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:56:26,845 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:56:26,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357734189] [2022-12-14 10:56:26,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357734189] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:56:26,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:56:26,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:56:26,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117031383] [2022-12-14 10:56:26,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:56:26,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 10:56:26,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:56:26,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 10:56:26,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:56:26,846 INFO L87 Difference]: Start difference. First operand 1222 states and 4546 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:56:27,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:56:27,280 INFO L93 Difference]: Finished difference Result 2636 states and 10231 transitions. [2022-12-14 10:56:27,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 10:56:27,281 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 10:56:27,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:56:27,288 INFO L225 Difference]: With dead ends: 2636 [2022-12-14 10:56:27,288 INFO L226 Difference]: Without dead ends: 2636 [2022-12-14 10:56:27,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 10:56:27,289 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 58 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:56:27,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 13 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:56:27,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2022-12-14 10:56:27,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 1684. [2022-12-14 10:56:27,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1657 states have (on average 4.009052504526252) internal successors, (6643), 1683 states have internal predecessors, (6643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:56:27,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 6643 transitions. [2022-12-14 10:56:27,332 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 6643 transitions. Word has length 14 [2022-12-14 10:56:27,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:56:27,332 INFO L495 AbstractCegarLoop]: Abstraction has 1684 states and 6643 transitions. [2022-12-14 10:56:27,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:56:27,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 6643 transitions. [2022-12-14 10:56:27,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 10:56:27,333 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:56:27,333 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:56:27,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-12-14 10:56:27,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:56:27,534 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:56:27,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:56:27,535 INFO L85 PathProgramCache]: Analyzing trace with hash -315629646, now seen corresponding path program 2 times [2022-12-14 10:56:27,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:56:27,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595543328] [2022-12-14 10:56:27,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:56:27,536 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:56:27,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:56:27,539 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:56:27,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-12-14 10:56:27,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 10:56:27,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:56:27,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 10:56:27,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:56:27,863 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:56:27,863 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 [2022-12-14 10:56:27,957 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 10:56:27,958 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 [2022-12-14 10:56:28,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:56:28,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 10:56:28,058 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:56:28,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 10:56:28,121 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-14 10:56:28,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 10:56:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 10:56:28,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:56:28,231 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:56:28,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595543328] [2022-12-14 10:56:28,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595543328] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:56:28,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:56:28,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 10:56:28,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551211509] [2022-12-14 10:56:28,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:56:28,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:56:28,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:56:28,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:56:28,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:56:28,232 INFO L87 Difference]: Start difference. First operand 1684 states and 6643 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-12-14 10:56:28,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:56:28,733 INFO L93 Difference]: Finished difference Result 2060 states and 8155 transitions. [2022-12-14 10:56:28,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 10:56:28,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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 15 [2022-12-14 10:56:28,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:56:28,739 INFO L225 Difference]: With dead ends: 2060 [2022-12-14 10:56:28,739 INFO L226 Difference]: Without dead ends: 2060 [2022-12-14 10:56:28,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 10:56:28,740 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 109 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 10:56:28,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 7 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 10:56:28,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2022-12-14 10:56:28,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1714. [2022-12-14 10:56:28,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1687 states have (on average 4.196206283343213) internal successors, (7079), 1713 states have internal predecessors, (7079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:56:28,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 7079 transitions. [2022-12-14 10:56:28,765 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 7079 transitions. Word has length 15 [2022-12-14 10:56:28,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:56:28,765 INFO L495 AbstractCegarLoop]: Abstraction has 1714 states and 7079 transitions. [2022-12-14 10:56:28,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2022-12-14 10:56:28,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 7079 transitions. [2022-12-14 10:56:28,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 10:56:28,766 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:56:28,766 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:56:28,788 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-12-14 10:56:28,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:56:28,967 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:56:28,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:56:28,967 INFO L85 PathProgramCache]: Analyzing trace with hash -315629644, now seen corresponding path program 1 times [2022-12-14 10:56:28,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:56:28,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450251535] [2022-12-14 10:56:28,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:56:28,969 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:56:28,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:56:28,972 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:56:28,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-12-14 10:56:29,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:56:29,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 10:56:29,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:56:29,443 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:56:29,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 10:56:29,555 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-14 10:56:29,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-12-14 10:56:29,637 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-14 10:56:29,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 10:56:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:56:29,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:56:30,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:56:30,387 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:56:30,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450251535] [2022-12-14 10:56:30,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450251535] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:56:30,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [285219728] [2022-12-14 10:56:30,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:56:30,387 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:56:30,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:56:30,388 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:56:30,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2022-12-14 10:56:30,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:56:30,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 10:56:30,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:56:31,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 10:56:31,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 10:56:31,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:56:31,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 10:56:31,220 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:56:31,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 10:56:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:56:31,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:56:31,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 10:56:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:56:32,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [285219728] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:56:32,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330882671] [2022-12-14 10:56:32,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:56:32,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:56:32,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:56:32,276 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:56:32,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-14 10:56:32,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:56:32,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 10:56:32,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:56:32,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 10:56:32,665 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-14 10:56:32,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 10:56:33,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:56:33,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:56:36,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:56:36,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330882671] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:56:36,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:56:36,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 7, 7, 7] total 31 [2022-12-14 10:56:36,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308736889] [2022-12-14 10:56:36,490 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:56:36,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 10:56:36,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:56:36,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 10:56:36,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=851, Unknown=1, NotChecked=0, Total=992 [2022-12-14 10:56:36,492 INFO L87 Difference]: Start difference. First operand 1714 states and 7079 transitions. Second operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:06,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:06,284 INFO L93 Difference]: Finished difference Result 2816 states and 11044 transitions. [2022-12-14 10:57:06,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 10:57:06,285 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 10:57:06,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:06,292 INFO L225 Difference]: With dead ends: 2816 [2022-12-14 10:57:06,292 INFO L226 Difference]: Without dead ends: 2816 [2022-12-14 10:57:06,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=624, Invalid=2237, Unknown=1, NotChecked=0, Total=2862 [2022-12-14 10:57:06,293 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1060 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1060 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:06,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1060 Valid, 98 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-12-14 10:57:06,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2816 states. [2022-12-14 10:57:06,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2816 to 1914. [2022-12-14 10:57:06,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1887 states have (on average 4.16163222045575) internal successors, (7853), 1913 states have internal predecessors, (7853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:06,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 7853 transitions. [2022-12-14 10:57:06,327 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 7853 transitions. Word has length 15 [2022-12-14 10:57:06,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:06,327 INFO L495 AbstractCegarLoop]: Abstraction has 1914 states and 7853 transitions. [2022-12-14 10:57:06,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:06,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 7853 transitions. [2022-12-14 10:57:06,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 10:57:06,327 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:06,327 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:06,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Ended with exit code 0 [2022-12-14 10:57:06,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-12-14 10:57:06,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (51)] Forceful destruction successful, exit code 0 [2022-12-14 10:57:06,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:57:06,929 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:57:06,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:06,930 INFO L85 PathProgramCache]: Analyzing trace with hash -315629642, now seen corresponding path program 1 times [2022-12-14 10:57:06,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:57:06,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [953904230] [2022-12-14 10:57:06,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:06,932 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:57:06,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:57:06,934 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:57:06,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-12-14 10:57:07,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:07,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 10:57:07,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:57:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:57:07,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:57:07,465 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 27 treesize of output 23 [2022-12-14 10:57:07,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:57:07,630 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:57:07,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [953904230] [2022-12-14 10:57:07,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [953904230] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:57:07,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1290076440] [2022-12-14 10:57:07,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:07,630 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:57:07,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:57:07,631 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:57:07,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-12-14 10:57:07,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:07,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 10:57:07,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:57:08,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 10:57:08,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:57:08,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:57:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:57:08,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1290076440] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:57:08,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505132246] [2022-12-14 10:57:08,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:08,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:57:08,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:57:08,774 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:57:08,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-12-14 10:57:08,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:08,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:57:08,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:57:08,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 10:57:08,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:57:08,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:57:09,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:57:09,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505132246] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:57:09,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:57:09,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7, 7, 6, 6] total 24 [2022-12-14 10:57:09,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808304694] [2022-12-14 10:57:09,518 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:57:09,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 10:57:09,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:57:09,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 10:57:09,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-12-14 10:57:09,518 INFO L87 Difference]: Start difference. First operand 1914 states and 7853 transitions. Second operand has 25 states, 24 states have (on average 1.875) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:16,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:16,864 INFO L93 Difference]: Finished difference Result 7456 states and 29384 transitions. [2022-12-14 10:57:16,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 10:57:16,865 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.875) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 10:57:16,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:16,885 INFO L225 Difference]: With dead ends: 7456 [2022-12-14 10:57:16,885 INFO L226 Difference]: Without dead ends: 7456 [2022-12-14 10:57:16,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=614, Invalid=2142, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 10:57:16,886 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2196 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2196 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:16,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2196 Valid, 97 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-12-14 10:57:16,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7456 states. [2022-12-14 10:57:16,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7456 to 1832. [2022-12-14 10:57:16,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1832 states, 1805 states have (on average 4.010526315789473) internal successors, (7239), 1831 states have internal predecessors, (7239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:16,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1832 states to 1832 states and 7239 transitions. [2022-12-14 10:57:16,962 INFO L78 Accepts]: Start accepts. Automaton has 1832 states and 7239 transitions. Word has length 15 [2022-12-14 10:57:16,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:16,962 INFO L495 AbstractCegarLoop]: Abstraction has 1832 states and 7239 transitions. [2022-12-14 10:57:16,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.875) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:16,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1832 states and 7239 transitions. [2022-12-14 10:57:16,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 10:57:16,962 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:16,963 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:16,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Ended with exit code 0 [2022-12-14 10:57:17,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-12-14 10:57:17,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (54)] Ended with exit code 0 [2022-12-14 10:57:17,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 10:57:17,564 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:57:17,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:17,566 INFO L85 PathProgramCache]: Analyzing trace with hash -326024357, now seen corresponding path program 1 times [2022-12-14 10:57:17,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:57:17,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917445294] [2022-12-14 10:57:17,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:17,567 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:57:17,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:57:17,570 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:57:17,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-12-14 10:57:17,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:17,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 10:57:17,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:57:17,901 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:57:17,901 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 [2022-12-14 10:57:17,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-14 10:57:18,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:57:18,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:57:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:57:18,324 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:57:18,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917445294] [2022-12-14 10:57:18,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917445294] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:57:18,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1383858336] [2022-12-14 10:57:18,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:18,324 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:57:18,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:57:18,325 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:57:18,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-12-14 10:57:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:18,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:57:18,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:57:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:57:18,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:57:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:57:18,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1383858336] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:57:18,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372771036] [2022-12-14 10:57:18,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:18,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:57:18,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:57:18,923 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:57:18,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-12-14 10:57:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:19,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 10:57:19,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:57:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:57:19,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:57:19,317 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:57:19,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372771036] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:57:19,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:57:19,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 7] total 22 [2022-12-14 10:57:19,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17574524] [2022-12-14 10:57:19,318 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:57:19,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 10:57:19,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:57:19,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 10:57:19,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-12-14 10:57:19,319 INFO L87 Difference]: Start difference. First operand 1832 states and 7239 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:23,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:23,632 INFO L93 Difference]: Finished difference Result 2114 states and 8048 transitions. [2022-12-14 10:57:23,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 10:57:23,633 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 10:57:23,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:23,638 INFO L225 Difference]: With dead ends: 2114 [2022-12-14 10:57:23,638 INFO L226 Difference]: Without dead ends: 2114 [2022-12-14 10:57:23,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=304, Invalid=886, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 10:57:23,639 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 561 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:23,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 119 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1094 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-12-14 10:57:23,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2022-12-14 10:57:23,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1944. [2022-12-14 10:57:23,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1944 states, 1917 states have (on average 3.964006259780908) internal successors, (7599), 1943 states have internal predecessors, (7599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:23,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1944 states to 1944 states and 7599 transitions. [2022-12-14 10:57:23,665 INFO L78 Accepts]: Start accepts. Automaton has 1944 states and 7599 transitions. Word has length 15 [2022-12-14 10:57:23,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:23,666 INFO L495 AbstractCegarLoop]: Abstraction has 1944 states and 7599 transitions. [2022-12-14 10:57:23,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:23,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1944 states and 7599 transitions. [2022-12-14 10:57:23,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 10:57:23,666 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:23,666 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:23,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2022-12-14 10:57:23,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-12-14 10:57:24,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-12-14 10:57:24,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:57:24,268 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:57:24,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:24,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1194578563, now seen corresponding path program 1 times [2022-12-14 10:57:24,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:57:24,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321286137] [2022-12-14 10:57:24,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:24,271 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:57:24,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:57:24,273 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:57:24,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-12-14 10:57:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:24,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 10:57:24,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:57:24,675 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:57:24,675 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 [2022-12-14 10:57:24,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 10:57:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:57:24,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:57:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:57:25,177 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:57:25,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321286137] [2022-12-14 10:57:25,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1321286137] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:57:25,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [440884000] [2022-12-14 10:57:25,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:25,177 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:57:25,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:57:25,178 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:57:25,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-12-14 10:57:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:25,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 10:57:25,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:57:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:57:25,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:57:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:57:25,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [440884000] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:57:25,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501143835] [2022-12-14 10:57:25,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:25,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:57:25,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:57:25,837 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:57:25,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-12-14 10:57:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:26,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 10:57:26,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:57:26,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:57:26,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:57:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 10:57:26,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501143835] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:57:26,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:57:26,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 7] total 22 [2022-12-14 10:57:26,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686861761] [2022-12-14 10:57:26,306 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:57:26,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 10:57:26,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:57:26,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 10:57:26,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-12-14 10:57:26,307 INFO L87 Difference]: Start difference. First operand 1944 states and 7599 transitions. Second operand has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:30,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:30,089 INFO L93 Difference]: Finished difference Result 1832 states and 6919 transitions. [2022-12-14 10:57:30,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 10:57:30,090 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 10:57:30,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:30,094 INFO L225 Difference]: With dead ends: 1832 [2022-12-14 10:57:30,094 INFO L226 Difference]: Without dead ends: 1832 [2022-12-14 10:57:30,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=304, Invalid=886, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 10:57:30,095 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 428 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:30,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 134 Invalid, 1222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-12-14 10:57:30,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2022-12-14 10:57:30,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1726. [2022-12-14 10:57:30,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1699 states have (on average 3.9234844025897586) internal successors, (6666), 1725 states have internal predecessors, (6666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:30,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 6666 transitions. [2022-12-14 10:57:30,118 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 6666 transitions. Word has length 16 [2022-12-14 10:57:30,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:30,118 INFO L495 AbstractCegarLoop]: Abstraction has 1726 states and 6666 transitions. [2022-12-14 10:57:30,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:30,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 6666 transitions. [2022-12-14 10:57:30,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 10:57:30,119 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:30,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:30,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-12-14 10:57:30,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (60)] Ended with exit code 0 [2022-12-14 10:57:30,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Ended with exit code 0 [2022-12-14 10:57:30,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:57:30,721 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:57:30,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:30,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1595221703, now seen corresponding path program 1 times [2022-12-14 10:57:30,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:57:30,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969546315] [2022-12-14 10:57:30,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 10:57:30,723 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:57:30,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:57:30,726 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:57:30,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-12-14 10:57:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 10:57:31,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 10:57:31,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:57:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 10:57:31,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 10:57:31,117 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:57:31,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969546315] [2022-12-14 10:57:31,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969546315] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 10:57:31,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 10:57:31,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 10:57:31,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319633690] [2022-12-14 10:57:31,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 10:57:31,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 10:57:31,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:57:31,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 10:57:31,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 10:57:31,118 INFO L87 Difference]: Start difference. First operand 1726 states and 6666 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:31,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:57:31,983 INFO L93 Difference]: Finished difference Result 2318 states and 8668 transitions. [2022-12-14 10:57:31,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 10:57:31,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 10:57:31,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:57:31,991 INFO L225 Difference]: With dead ends: 2318 [2022-12-14 10:57:31,991 INFO L226 Difference]: Without dead ends: 2226 [2022-12-14 10:57:31,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 10:57:31,991 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 83 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 10:57:31,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 27 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 10:57:31,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2022-12-14 10:57:32,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1614. [2022-12-14 10:57:32,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1576 states have (on average 3.7011421319796955) internal successors, (5833), 1613 states have internal predecessors, (5833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:32,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 5833 transitions. [2022-12-14 10:57:32,018 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 5833 transitions. Word has length 16 [2022-12-14 10:57:32,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:57:32,018 INFO L495 AbstractCegarLoop]: Abstraction has 1614 states and 5833 transitions. [2022-12-14 10:57:32,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:57:32,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 5833 transitions. [2022-12-14 10:57:32,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 10:57:32,019 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:57:32,019 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 10:57:32,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-12-14 10:57:32,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:57:32,220 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:57:32,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:57:32,221 INFO L85 PathProgramCache]: Analyzing trace with hash 157492838, now seen corresponding path program 2 times [2022-12-14 10:57:32,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:57:32,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [54125765] [2022-12-14 10:57:32,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:57:32,222 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:57:32,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:57:32,225 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:57:32,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-12-14 10:57:32,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:57:32,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:57:32,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 10:57:32,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:57:32,721 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:57:32,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 10:57:32,820 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 10:57:32,820 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 [2022-12-14 10:57:32,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:57:32,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 10:57:32,919 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:57:32,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 10:57:32,982 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-14 10:57:32,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 10:57:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 10:57:33,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:57:33,872 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 10:57:33,872 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:57:33,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [54125765] [2022-12-14 10:57:33,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [54125765] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:57:33,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [78442501] [2022-12-14 10:57:33,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:57:33,873 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:57:33,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:57:33,873 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:57:33,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-12-14 10:57:34,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:57:34,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:57:34,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 10:57:34,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:57:34,459 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:57:34,459 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 [2022-12-14 10:57:34,575 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 10:57:34,575 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 [2022-12-14 10:57:34,975 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 10:57:34,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 10:57:34,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 10:57:35,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:57:35,181 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 10:57:35,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2022-12-14 10:57:35,202 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 10:57:35,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 10:57:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 10:57:35,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:57:41,188 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 10:57:41,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [78442501] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:57:41,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699850804] [2022-12-14 10:57:41,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:57:41,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:57:41,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:57:41,192 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:57:41,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-12-14 10:57:41,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:57:41,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:57:41,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 10:57:41,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:57:41,567 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:57:41,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 10:57:41,672 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 10:57:41,672 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 [2022-12-14 10:57:42,020 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 10:57:42,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 10:57:42,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 10:57:42,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 10:57:42,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 10:57:42,230 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-12-14 10:57:42,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-12-14 10:57:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 10:57:42,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:57:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 10:57:48,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699850804] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:57:48,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:57:48,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 8, 8, 8, 9] total 39 [2022-12-14 10:57:48,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864722299] [2022-12-14 10:57:48,206 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:57:48,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 10:57:48,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:57:48,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 10:57:48,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1432, Unknown=1, NotChecked=0, Total=1640 [2022-12-14 10:57:48,207 INFO L87 Difference]: Start difference. First operand 1614 states and 5833 transitions. Second operand has 41 states, 40 states have (on average 1.825) internal successors, (73), 40 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:58:15,451 WARN L233 SmtUtils]: Spent 25.49s on a formula simplification. DAG size of input: 71 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:58:27,647 WARN L233 SmtUtils]: Spent 11.49s on a formula simplification. DAG size of input: 66 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 10:58:29,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 10:58:33,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 10:58:36,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 10:59:02,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 10:59:02,337 INFO L93 Difference]: Finished difference Result 8851 states and 32671 transitions. [2022-12-14 10:59:02,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-12-14 10:59:02,339 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.825) internal successors, (73), 40 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 10:59:02,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 10:59:02,378 INFO L225 Difference]: With dead ends: 8851 [2022-12-14 10:59:02,379 INFO L226 Difference]: Without dead ends: 8851 [2022-12-14 10:59:02,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2685 ImplicationChecksByTransitivity, 68.5s TimeCoverageRelationStatistics Valid=1925, Invalid=7776, Unknown=1, NotChecked=0, Total=9702 [2022-12-14 10:59:02,381 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 3638 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 2798 mSolverCounterSat, 252 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3638 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 3053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 2798 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2022-12-14 10:59:02,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3638 Valid, 277 Invalid, 3053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 2798 Invalid, 3 Unknown, 0 Unchecked, 17.2s Time] [2022-12-14 10:59:02,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8851 states. [2022-12-14 10:59:02,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8851 to 2798. [2022-12-14 10:59:02,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2798 states, 2760 states have (on average 3.946376811594203) internal successors, (10892), 2797 states have internal predecessors, (10892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:59:02,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2798 states to 2798 states and 10892 transitions. [2022-12-14 10:59:02,488 INFO L78 Accepts]: Start accepts. Automaton has 2798 states and 10892 transitions. Word has length 18 [2022-12-14 10:59:02,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 10:59:02,489 INFO L495 AbstractCegarLoop]: Abstraction has 2798 states and 10892 transitions. [2022-12-14 10:59:02,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.825) internal successors, (73), 40 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:59:02,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2798 states and 10892 transitions. [2022-12-14 10:59:02,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 10:59:02,490 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 10:59:02,490 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 1, 1, 1] [2022-12-14 10:59:02,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-12-14 10:59:02,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (64)] Forceful destruction successful, exit code 0 [2022-12-14 10:59:02,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-12-14 10:59:03,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:59:03,092 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 10:59:03,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 10:59:03,094 INFO L85 PathProgramCache]: Analyzing trace with hash -917861343, now seen corresponding path program 2 times [2022-12-14 10:59:03,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 10:59:03,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1135110381] [2022-12-14 10:59:03,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:59:03,096 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 10:59:03,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 10:59:03,097 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 10:59:03,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-12-14 10:59:03,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:59:03,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:59:03,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 10:59:03,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:59:03,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 10:59:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 40 proven. 38 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 10:59:03,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:59:07,556 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 10:59:07,557 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 10:59:07,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1135110381] [2022-12-14 10:59:07,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1135110381] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:59:07,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [209092000] [2022-12-14 10:59:07,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:59:07,557 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 10:59:07,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 10:59:07,558 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 10:59:07,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-12-14 10:59:07,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:59:07,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:59:07,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 10:59:07,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:59:08,069 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 10:59:08,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-12-14 10:59:08,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 10:59:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 40 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 10:59:09,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:59:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 40 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 10:59:11,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [209092000] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:59:11,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070360374] [2022-12-14 10:59:11,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 10:59:11,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 10:59:11,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 10:59:11,438 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 10:59:11,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-12-14 10:59:11,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 10:59:11,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 10:59:11,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 10:59:11,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 10:59:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 40 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 10:59:11,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 10:59:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 40 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-14 10:59:12,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070360374] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 10:59:12,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 10:59:12,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 11, 11, 11, 11] total 56 [2022-12-14 10:59:12,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830197226] [2022-12-14 10:59:12,921 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 10:59:12,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-14 10:59:12,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 10:59:12,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-14 10:59:12,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=2845, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 10:59:12,922 INFO L87 Difference]: Start difference. First operand 2798 states and 10892 transitions. Second operand has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 10:59:30,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:59:32,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:59:34,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:59:35,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:59:39,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:59:41,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:59:44,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:59:49,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:59:51,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 10:59:53,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:00:01,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:00:03,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 11:00:29,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:00:29,288 INFO L93 Difference]: Finished difference Result 13988 states and 55801 transitions. [2022-12-14 11:00:29,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-12-14 11:00:29,290 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 11:00:29,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:00:29,338 INFO L225 Difference]: With dead ends: 13988 [2022-12-14 11:00:29,338 INFO L226 Difference]: Without dead ends: 13988 [2022-12-14 11:00:29,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1470 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=1455, Invalid=6735, Unknown=0, NotChecked=0, Total=8190 [2022-12-14 11:00:29,340 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3517 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 5163 mSolverCounterSat, 600 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3517 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 5766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 600 IncrementalHoareTripleChecker+Valid, 5163 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:00:29,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3517 Valid, 423 Invalid, 5766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [600 Valid, 5163 Invalid, 3 Unknown, 0 Unchecked, 59.1s Time] [2022-12-14 11:00:29,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13988 states. [2022-12-14 11:00:29,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13988 to 2815. [2022-12-14 11:00:29,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2815 states, 2777 states have (on average 3.9297803384947785) internal successors, (10913), 2814 states have internal predecessors, (10913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:00:29,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2815 states to 2815 states and 10913 transitions. [2022-12-14 11:00:29,464 INFO L78 Accepts]: Start accepts. Automaton has 2815 states and 10913 transitions. Word has length 19 [2022-12-14 11:00:29,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:00:29,464 INFO L495 AbstractCegarLoop]: Abstraction has 2815 states and 10913 transitions. [2022-12-14 11:00:29,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:00:29,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2815 states and 10913 transitions. [2022-12-14 11:00:29,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 11:00:29,465 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:00:29,465 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:00:29,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Ended with exit code 0 [2022-12-14 11:00:29,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-12-14 11:00:29,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (67)] Forceful destruction successful, exit code 0 [2022-12-14 11:00:30,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:00:30,067 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 11:00:30,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:00:30,068 INFO L85 PathProgramCache]: Analyzing trace with hash 909552594, now seen corresponding path program 2 times [2022-12-14 11:00:30,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:00:30,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1381062693] [2022-12-14 11:00:30,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:00:30,069 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:00:30,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:00:30,070 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:00:30,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-12-14 11:00:30,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:00:30,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:00:30,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:00:30,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:00:30,531 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:00:30,532 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 [2022-12-14 11:00:30,636 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 11:00:30,636 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 [2022-12-14 11:00:30,747 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:00:30,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 11:00:30,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 11:00:30,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:00:30,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 11:00:30,847 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 11:00:30,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 11:00:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:00:30,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:00:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 11:00:32,130 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:00:32,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1381062693] [2022-12-14 11:00:32,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1381062693] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:00:32,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1410870930] [2022-12-14 11:00:32,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:00:32,130 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:00:32,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:00:32,131 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:00:32,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-12-14 11:00:32,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:00:32,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:00:32,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 11:00:32,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:00:32,817 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:00:32,817 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 [2022-12-14 11:00:32,948 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 11:00:32,948 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 [2022-12-14 11:00:33,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:00:33,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 11:00:33,258 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:00:33,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 11:00:33,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:00:33,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:00:33,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-12-14 11:00:33,437 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-12-14 11:00:33,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-12-14 11:00:33,803 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:00:33,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:00:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:00:47,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1410870930] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:00:47,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645858322] [2022-12-14 11:00:47,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:00:47,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:00:47,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:00:47,839 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:00:47,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-12-14 11:00:48,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:00:48,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:00:48,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 11:00:48,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:00:48,246 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:00:48,246 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 [2022-12-14 11:00:48,357 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-12-14 11:00:48,357 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 15 treesize of output 50 [2022-12-14 11:00:48,447 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 11:00:48,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 11:00:48,479 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:00:48,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 11:00:48,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:00:48,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 11:00:48,717 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-12-14 11:00:48,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-12-14 11:00:49,589 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:00:49,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:00:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 3 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-14 11:00:55,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645858322] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:00:55,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:00:55,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8, 8, 9, 10] total 43 [2022-12-14 11:00:55,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861965719] [2022-12-14 11:00:55,803 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:00:55,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 11:00:55,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:00:55,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 11:00:55,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1729, Unknown=5, NotChecked=0, Total=1980 [2022-12-14 11:00:55,805 INFO L87 Difference]: Start difference. First operand 2815 states and 10913 transitions. Second operand has 45 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 44 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:10,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:01:10,830 INFO L93 Difference]: Finished difference Result 9703 states and 39990 transitions. [2022-12-14 11:01:10,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-12-14 11:01:10,832 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 44 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 11:01:10,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:01:10,868 INFO L225 Difference]: With dead ends: 9703 [2022-12-14 11:01:10,868 INFO L226 Difference]: Without dead ends: 9703 [2022-12-14 11:01:10,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=1515, Invalid=5452, Unknown=5, NotChecked=0, Total=6972 [2022-12-14 11:01:10,869 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2675 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 2767 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2675 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 2945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 2767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:01:10,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2675 Valid, 251 Invalid, 2945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 2767 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-12-14 11:01:10,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9703 states. [2022-12-14 11:01:10,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9703 to 4231. [2022-12-14 11:01:10,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4231 states, 4193 states have (on average 4.586453613164799) internal successors, (19231), 4230 states have internal predecessors, (19231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:11,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4231 states to 4231 states and 19231 transitions. [2022-12-14 11:01:11,015 INFO L78 Accepts]: Start accepts. Automaton has 4231 states and 19231 transitions. Word has length 19 [2022-12-14 11:01:11,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:01:11,015 INFO L495 AbstractCegarLoop]: Abstraction has 4231 states and 19231 transitions. [2022-12-14 11:01:11,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 44 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:01:11,015 INFO L276 IsEmpty]: Start isEmpty. Operand 4231 states and 19231 transitions. [2022-12-14 11:01:11,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 11:01:11,016 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:01:11,016 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:01:11,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-12-14 11:01:11,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-12-14 11:01:11,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (70)] Ended with exit code 0 [2022-12-14 11:01:11,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:01:11,618 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-12-14 11:01:11,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:01:11,621 INFO L85 PathProgramCache]: Analyzing trace with hash 909552596, now seen corresponding path program 1 times [2022-12-14 11:01:11,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:01:11,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1130620338] [2022-12-14 11:01:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:01:11,622 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:01:11,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:01:11,623 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:01:11,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-12-14 11:01:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:01:12,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 11:01:12,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:01:12,183 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-12-14 11:01:12,183 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 [2022-12-14 11:01:12,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 11:01:12,387 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-14 11:01:12,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2022-12-14 11:01:12,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:01:12,545 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-14 11:01:12,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 30 [2022-12-14 11:01:12,563 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 11:01:12,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 11:01:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:01:12,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:01:13,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-14 11:01:13,977 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:01:13,978 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:01:13,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1130620338] [2022-12-14 11:01:13,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1130620338] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:01:13,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [70019132] [2022-12-14 11:01:13,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:01:13,978 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:01:13,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:01:13,979 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:01:13,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2022-12-14 11:01:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:01:15,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:01:15,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:01:15,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 11:01:15,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 11:01:15,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:01:15,547 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-14 11:01:15,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 30 [2022-12-14 11:01:15,561 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 11:01:15,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 11:01:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:01:15,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:01:16,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 11:01:17,417 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:01:17,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [70019132] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:01:17,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867671792] [2022-12-14 11:01:17,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:01:17,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:01:17,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:01:17,419 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:01:17,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b8ddcbf4-5ff7-4dc0-b2a2-687358a76ffd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-12-14 11:01:17,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:01:17,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 11:01:17,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:01:17,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 11:01:17,905 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-12-14 11:01:17,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 11:01:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:01:18,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:01:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 11:01:23,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867671792] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:01:23,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:01:23,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 39 [2022-12-14 11:01:23,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969385084] [2022-12-14 11:01:23,119 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:01:23,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-14 11:01:23,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:01:23,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-14 11:01:23,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1370, Unknown=1, NotChecked=0, Total=1560 [2022-12-14 11:01:23,121 INFO L87 Difference]: Start difference. First operand 4231 states and 19231 transitions. Second operand has 40 states, 39 states have (on average 1.7179487179487178) internal successors, (67), 40 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:02:27,200 WARN L233 SmtUtils]: Spent 57.03s on a formula simplification. DAG size of input: 77 DAG size of output: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:02:34,555 WARN L233 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 86 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:02:36,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:03:37,772 WARN L233 SmtUtils]: Spent 1.01m on a formula simplification. DAG size of input: 75 DAG size of output: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:03:49,377 WARN L233 SmtUtils]: Spent 6.31s on a formula simplification. DAG size of input: 81 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:03:51,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:03:53,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:04:34,448 WARN L233 SmtUtils]: Spent 38.71s on a formula simplification. DAG size of input: 73 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:04:43,056 WARN L233 SmtUtils]: Spent 8.34s on a formula simplification. DAG size of input: 74 DAG size of output: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:04:45,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:04:47,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:04:49,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:05:16,693 WARN L233 SmtUtils]: Spent 26.60s on a formula simplification. DAG size of input: 68 DAG size of output: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:05:21,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:05:32,094 WARN L233 SmtUtils]: Spent 6.59s on a formula simplification. DAG size of input: 91 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:05:34,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:05:37,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:05:39,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:05:41,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:05:43,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:05:45,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:05:50,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:05:52,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-14 11:05:54,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1]