./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b 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_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:34:34,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:34:34,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:34:34,703 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:34:34,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:34:34,705 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:34:34,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:34:34,708 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:34:34,710 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:34:34,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:34:34,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:34:34,714 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:34:34,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:34:34,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:34:34,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:34:34,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:34:34,719 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:34:34,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:34:34,722 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:34:34,724 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:34:34,726 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:34:34,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:34:34,732 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:34:34,734 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:34:34,738 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:34:34,739 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:34:34,739 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:34:34,740 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:34:34,741 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:34:34,742 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:34:34,742 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:34:34,743 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:34:34,745 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:34:34,746 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:34:34,754 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:34:34,755 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:34:34,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:34:34,760 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:34:34,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:34:34,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:34:34,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:34:34,763 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 08:34:34,807 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:34:34,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:34:34,808 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:34:34,808 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:34:34,809 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:34:34,809 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:34:34,809 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:34:34,810 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:34:34,810 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:34:34,810 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:34:34,816 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:34:34,817 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:34:34,817 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:34:34,817 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:34:34,817 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:34:34,817 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:34:34,818 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:34:34,818 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:34:34,818 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 08:34:34,819 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 08:34:34,819 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:34:34,819 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:34:34,819 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 08:34:34,820 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:34:34,820 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:34:34,820 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:34:34,820 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 08:34:34,821 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 08:34:34,821 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 08:34:34,821 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:34:34,821 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 08:34:34,822 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:34:34,822 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:34:34,822 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:34:34,822 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:34:34,823 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:34:34,823 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:34:34,823 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:34:34,823 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:34:34,823 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:34:34,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:34:34,824 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:34:34,824 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_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 [2022-11-19 08:34:35,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:34:35,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:34:35,188 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:34:35,189 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:34:35,190 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:34:35,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2022-11-19 08:34:35,267 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/data/a8bb06221/e19aea4cb153499f84d49f14e7a6df49/FLAG165ee03f1 [2022-11-19 08:34:35,772 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:34:35,773 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2022-11-19 08:34:35,787 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/data/a8bb06221/e19aea4cb153499f84d49f14e7a6df49/FLAG165ee03f1 [2022-11-19 08:34:36,117 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/data/a8bb06221/e19aea4cb153499f84d49f14e7a6df49 [2022-11-19 08:34:36,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:34:36,121 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:34:36,126 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:34:36,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:34:36,130 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:34:36,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:34:36" (1/1) ... [2022-11-19 08:34:36,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74bd469d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:36, skipping insertion in model container [2022-11-19 08:34:36,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:34:36" (1/1) ... [2022-11-19 08:34:36,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:34:36,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:34:36,484 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2022-11-19 08:34:36,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:34:36,525 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-19 08:34:36,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@106348e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:36, skipping insertion in model container [2022-11-19 08:34:36,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:34:36,526 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-19 08:34:36,530 INFO L158 Benchmark]: Toolchain (without parser) took 406.58ms. Allocated memory is still 134.2MB. Free memory was 96.9MB in the beginning and 110.8MB in the end (delta: -13.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 08:34:36,532 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 134.2MB. Free memory is still 114.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:34:36,534 INFO L158 Benchmark]: CACSL2BoogieTranslator took 400.03ms. Allocated memory is still 134.2MB. Free memory was 96.7MB in the beginning and 110.8MB in the end (delta: -14.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 08:34:36,536 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 134.2MB. Free memory is still 114.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 400.03ms. Allocated memory is still 134.2MB. Free memory was 96.7MB in the beginning and 110.8MB in the end (delta: -14.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 145]: 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_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:34:38,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:34:38,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:34:38,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:34:38,893 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:34:38,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:34:38,903 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:34:38,909 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:34:38,912 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:34:38,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:34:38,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:34:38,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:34:38,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:34:38,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:34:38,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:34:38,926 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:34:38,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:34:38,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:34:38,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:34:38,946 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:34:38,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:34:38,956 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:34:38,957 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:34:38,959 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:34:38,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:34:38,963 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:34:38,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:34:38,965 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:34:38,966 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:34:38,967 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:34:38,967 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:34:38,968 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:34:38,969 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:34:38,970 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:34:38,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:34:38,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:34:38,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:34:38,974 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:34:38,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:34:38,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:34:38,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:34:38,977 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-19 08:34:39,029 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:34:39,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:34:39,031 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:34:39,031 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:34:39,033 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:34:39,033 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:34:39,033 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:34:39,034 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:34:39,034 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:34:39,034 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:34:39,036 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:34:39,036 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:34:39,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 08:34:39,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 08:34:39,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:34:39,039 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:34:39,039 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 08:34:39,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:34:39,039 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:34:39,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:34:39,040 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 08:34:39,040 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 08:34:39,040 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 08:34:39,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:34:39,041 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 08:34:39,041 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 08:34:39,041 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 08:34:39,042 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:34:39,042 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:34:39,042 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:34:39,043 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 08:34:39,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:34:39,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:34:39,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:34:39,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:34:39,045 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 08:34:39,045 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 08:34:39,045 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:34:39,045 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 08:34:39,046 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_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54b834084fe1393c06cef2b14fb31f788537bd44a8744d5b4241cffc72e1d744 [2022-11-19 08:34:39,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:34:39,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:34:39,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:34:39,560 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:34:39,563 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:34:39,564 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2022-11-19 08:34:39,650 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/data/5f240c0dd/899621edf69844b986be92ad094422b3/FLAG0aed4459c [2022-11-19 08:34:40,283 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:34:40,284 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c [2022-11-19 08:34:40,293 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/data/5f240c0dd/899621edf69844b986be92ad094422b3/FLAG0aed4459c [2022-11-19 08:34:40,680 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/data/5f240c0dd/899621edf69844b986be92ad094422b3 [2022-11-19 08:34:40,682 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:34:40,683 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:34:40,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:34:40,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:34:40,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:34:40,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:34:40" (1/1) ... [2022-11-19 08:34:40,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@791a297c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:40, skipping insertion in model container [2022-11-19 08:34:40,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:34:40" (1/1) ... [2022-11-19 08:34:40,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:34:40,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:34:41,036 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2022-11-19 08:34:41,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:34:41,128 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-19 08:34:41,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:34:41,170 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2022-11-19 08:34:41,177 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:34:41,191 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:34:41,230 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/sv-benchmarks/c/weaver/parallel-parallel-sum-1.wvr.c[3642,3655] [2022-11-19 08:34:41,235 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:34:41,253 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:34:41,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:41 WrapperNode [2022-11-19 08:34:41,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:34:41,255 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:34:41,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:34:41,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:34:41,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:41" (1/1) ... [2022-11-19 08:34:41,277 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:41" (1/1) ... [2022-11-19 08:34:41,315 INFO L138 Inliner]: procedures = 29, calls = 68, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 283 [2022-11-19 08:34:41,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:34:41,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:34:41,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:34:41,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:34:41,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:41" (1/1) ... [2022-11-19 08:34:41,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:41" (1/1) ... [2022-11-19 08:34:41,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:41" (1/1) ... [2022-11-19 08:34:41,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:41" (1/1) ... [2022-11-19 08:34:41,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:41" (1/1) ... [2022-11-19 08:34:41,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:41" (1/1) ... [2022-11-19 08:34:41,355 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:41" (1/1) ... [2022-11-19 08:34:41,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:41" (1/1) ... [2022-11-19 08:34:41,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:34:41,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:34:41,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:34:41,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:34:41,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:41" (1/1) ... [2022-11-19 08:34:41,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:34:41,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:34:41,402 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:34:41,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:34:41,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:34:41,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 08:34:41,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:34:41,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-19 08:34:41,448 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-19 08:34:41,448 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-19 08:34:41,449 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-19 08:34:41,449 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-19 08:34:41,449 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-19 08:34:41,449 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-19 08:34:41,449 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-19 08:34:41,450 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-19 08:34:41,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-19 08:34:41,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-19 08:34:41,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 08:34:41,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:34:41,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:34:41,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:34:41,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-19 08:34:41,453 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-19 08:34:41,644 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:34:41,646 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:34:42,596 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:34:43,001 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:34:43,002 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-19 08:34:43,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:34:43 BoogieIcfgContainer [2022-11-19 08:34:43,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:34:43,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:34:43,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:34:43,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:34:43,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:34:40" (1/3) ... [2022-11-19 08:34:43,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56782f6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:34:43, skipping insertion in model container [2022-11-19 08:34:43,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:34:41" (2/3) ... [2022-11-19 08:34:43,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56782f6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:34:43, skipping insertion in model container [2022-11-19 08:34:43,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:34:43" (3/3) ... [2022-11-19 08:34:43,031 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-1.wvr.c [2022-11-19 08:34:43,054 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:34:43,054 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2022-11-19 08:34:43,055 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-19 08:34:43,185 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-19 08:34:43,223 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 08:34:43,239 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 224 places, 226 transitions, 484 flow [2022-11-19 08:34:43,242 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 224 places, 226 transitions, 484 flow [2022-11-19 08:34:43,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 226 transitions, 484 flow [2022-11-19 08:34:43,351 INFO L130 PetriNetUnfolder]: 15/222 cut-off events. [2022-11-19 08:34:43,352 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-19 08:34:43,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 222 events. 15/222 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 206 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 169. Up to 2 conditions per place. [2022-11-19 08:34:43,362 INFO L119 LiptonReduction]: Number of co-enabled transitions 3608 [2022-11-19 08:35:10,937 WARN L233 SmtUtils]: Spent 5.96s on a formula simplification. DAG size of input: 119 DAG size of output: 118 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-19 08:35:19,579 WARN L233 SmtUtils]: Spent 6.89s on a formula simplification. DAG size of input: 125 DAG size of output: 124 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-19 08:35:21,801 INFO L134 LiptonReduction]: Checked pairs total: 7377 [2022-11-19 08:35:21,802 INFO L136 LiptonReduction]: Total number of compositions: 237 [2022-11-19 08:35:21,809 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 71 places, 63 transitions, 158 flow [2022-11-19 08:35:22,070 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3750 states, 3346 states have (on average 4.950986252241482) internal successors, (16566), 3749 states have internal predecessors, (16566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:22,093 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:35:22,100 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;@20c48a3d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:35:22,100 INFO L358 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2022-11-19 08:35:22,120 INFO L276 IsEmpty]: Start isEmpty. Operand has 3750 states, 3346 states have (on average 4.950986252241482) internal successors, (16566), 3749 states have internal predecessors, (16566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:22,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 08:35:22,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:22,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 08:35:22,129 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:35:22,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:22,136 INFO L85 PathProgramCache]: Analyzing trace with hash 38461, now seen corresponding path program 1 times [2022-11-19 08:35:22,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:22,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622839708] [2022-11-19 08:35:22,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:22,155 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:22,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:22,166 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:22,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-19 08:35:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:22,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:35:22,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:22,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:22,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:22,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:22,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:22,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:22,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:22,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:22,898 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-19 08:35:22,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 38 [2022-11-19 08:35:22,971 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-19 08:35:22,972 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 40 treesize of output 34 [2022-11-19 08:35:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:23,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:35:23,067 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:23,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622839708] [2022-11-19 08:35:23,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622839708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:23,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:35:23,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:35:23,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252860395] [2022-11-19 08:35:23,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:23,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:35:23,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:23,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:35:23,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:35:23,122 INFO L87 Difference]: Start difference. First operand has 3750 states, 3346 states have (on average 4.950986252241482) internal successors, (16566), 3749 states have internal predecessors, (16566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:23,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:23,616 INFO L93 Difference]: Finished difference Result 3750 states and 16570 transitions. [2022-11-19 08:35:23,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:35:23,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 08:35:23,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:23,699 INFO L225 Difference]: With dead ends: 3750 [2022-11-19 08:35:23,700 INFO L226 Difference]: Without dead ends: 3750 [2022-11-19 08:35:23,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:35:23,711 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:23,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 56 Unchecked, 0.3s Time] [2022-11-19 08:35:23,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3750 states. [2022-11-19 08:35:24,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3750 to 3750. [2022-11-19 08:35:24,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3750 states, 3347 states have (on average 4.950702121302659) internal successors, (16570), 3749 states have internal predecessors, (16570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:24,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3750 states to 3750 states and 16570 transitions. [2022-11-19 08:35:24,111 INFO L78 Accepts]: Start accepts. Automaton has 3750 states and 16570 transitions. Word has length 2 [2022-11-19 08:35:24,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:24,113 INFO L495 AbstractCegarLoop]: Abstraction has 3750 states and 16570 transitions. [2022-11-19 08:35:24,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:24,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3750 states and 16570 transitions. [2022-11-19 08:35:24,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 08:35:24,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:24,114 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 08:35:24,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:24,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:24,330 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:35:24,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:24,331 INFO L85 PathProgramCache]: Analyzing trace with hash 38462, now seen corresponding path program 1 times [2022-11-19 08:35:24,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:24,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045930772] [2022-11-19 08:35:24,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:24,332 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:24,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:24,334 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:24,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-19 08:35:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:24,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:35:24,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:24,854 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-11-19 08:35:24,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 69 [2022-11-19 08:35:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:25,027 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:35:25,027 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:25,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045930772] [2022-11-19 08:35:25,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045930772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:25,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:35:25,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:35:25,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656745231] [2022-11-19 08:35:25,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:25,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:35:25,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:25,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:35:25,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:35:25,031 INFO L87 Difference]: Start difference. First operand 3750 states and 16570 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:25,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:25,471 INFO L93 Difference]: Finished difference Result 3750 states and 16569 transitions. [2022-11-19 08:35:25,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:35:25,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 08:35:25,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:25,535 INFO L225 Difference]: With dead ends: 3750 [2022-11-19 08:35:25,535 INFO L226 Difference]: Without dead ends: 3750 [2022-11-19 08:35:25,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:35:25,537 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:25,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 56 Unchecked, 0.3s Time] [2022-11-19 08:35:25,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3750 states. [2022-11-19 08:35:25,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3750 to 3750. [2022-11-19 08:35:25,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3750 states, 3347 states have (on average 4.950403346280251) internal successors, (16569), 3749 states have internal predecessors, (16569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:25,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3750 states to 3750 states and 16569 transitions. [2022-11-19 08:35:25,952 INFO L78 Accepts]: Start accepts. Automaton has 3750 states and 16569 transitions. Word has length 2 [2022-11-19 08:35:25,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:25,952 INFO L495 AbstractCegarLoop]: Abstraction has 3750 states and 16569 transitions. [2022-11-19 08:35:25,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:25,966 INFO L276 IsEmpty]: Start isEmpty. Operand 3750 states and 16569 transitions. [2022-11-19 08:35:25,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 08:35:25,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:25,967 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 08:35:25,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-19 08:35:26,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:26,192 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:35:26,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:26,193 INFO L85 PathProgramCache]: Analyzing trace with hash 38281, now seen corresponding path program 1 times [2022-11-19 08:35:26,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:26,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1681085816] [2022-11-19 08:35:26,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:26,193 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:26,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:26,198 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:26,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-19 08:35:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:26,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:35:26,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:26,598 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-19 08:35:26,599 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-19 08:35:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:26,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:35:26,644 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:26,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1681085816] [2022-11-19 08:35:26,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1681085816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:26,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:35:26,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:35:26,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427913698] [2022-11-19 08:35:26,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:26,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:35:26,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:26,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:35:26,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:35:26,647 INFO L87 Difference]: Start difference. First operand 3750 states and 16569 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:27,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:27,022 INFO L93 Difference]: Finished difference Result 3749 states and 16567 transitions. [2022-11-19 08:35:27,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:35:27,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 08:35:27,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:27,072 INFO L225 Difference]: With dead ends: 3749 [2022-11-19 08:35:27,072 INFO L226 Difference]: Without dead ends: 3749 [2022-11-19 08:35:27,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:35:27,074 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 55 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:27,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 0 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:35:27,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3749 states. [2022-11-19 08:35:27,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3749 to 3749. [2022-11-19 08:35:27,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3749 states, 3347 states have (on average 4.9498057962354345) internal successors, (16567), 3748 states have internal predecessors, (16567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:27,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3749 states to 3749 states and 16567 transitions. [2022-11-19 08:35:27,371 INFO L78 Accepts]: Start accepts. Automaton has 3749 states and 16567 transitions. Word has length 2 [2022-11-19 08:35:27,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:27,372 INFO L495 AbstractCegarLoop]: Abstraction has 3749 states and 16567 transitions. [2022-11-19 08:35:27,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:27,372 INFO L276 IsEmpty]: Start isEmpty. Operand 3749 states and 16567 transitions. [2022-11-19 08:35:27,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 08:35:27,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:27,373 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 08:35:27,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:27,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:27,592 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:35:27,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:27,593 INFO L85 PathProgramCache]: Analyzing trace with hash 38282, now seen corresponding path program 1 times [2022-11-19 08:35:27,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:27,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721315204] [2022-11-19 08:35:27,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:27,594 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:27,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:27,595 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:27,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-19 08:35:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:27,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:35:27,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:28,029 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:35:28,030 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:35:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:28,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:35:28,090 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:28,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721315204] [2022-11-19 08:35:28,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721315204] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:28,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:35:28,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:35:28,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760035264] [2022-11-19 08:35:28,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:28,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:35:28,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:28,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:35:28,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:35:28,092 INFO L87 Difference]: Start difference. First operand 3749 states and 16567 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:28,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:28,983 INFO L93 Difference]: Finished difference Result 7492 states and 33124 transitions. [2022-11-19 08:35:28,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:35:28,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 08:35:28,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:29,121 INFO L225 Difference]: With dead ends: 7492 [2022-11-19 08:35:29,121 INFO L226 Difference]: Without dead ends: 7492 [2022-11-19 08:35:29,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:35:29,122 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 51 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:29,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 0 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:35:29,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7492 states. [2022-11-19 08:35:29,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7492 to 3749. [2022-11-19 08:35:29,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3749 states, 3347 states have (on average 4.9495070212130265) internal successors, (16566), 3748 states have internal predecessors, (16566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:29,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3749 states to 3749 states and 16566 transitions. [2022-11-19 08:35:29,405 INFO L78 Accepts]: Start accepts. Automaton has 3749 states and 16566 transitions. Word has length 2 [2022-11-19 08:35:29,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:29,406 INFO L495 AbstractCegarLoop]: Abstraction has 3749 states and 16566 transitions. [2022-11-19 08:35:29,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:29,406 INFO L276 IsEmpty]: Start isEmpty. Operand 3749 states and 16566 transitions. [2022-11-19 08:35:29,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 08:35:29,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:29,407 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 08:35:29,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:29,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:29,608 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:35:29,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:29,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1191599, now seen corresponding path program 1 times [2022-11-19 08:35:29,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:29,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093662502] [2022-11-19 08:35:29,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:29,610 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:29,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:29,612 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:29,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-19 08:35:29,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:29,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:35:29,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:29,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:29,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:29,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:29,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:29,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:30,029 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-11-19 08:35:30,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-11-19 08:35:30,094 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2022-11-19 08:35:30,094 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 89 treesize of output 88 [2022-11-19 08:35:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:30,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:30,758 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:30,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093662502] [2022-11-19 08:35:30,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093662502] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:30,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [64406421] [2022-11-19 08:35:30,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:30,759 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:35:30,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:35:30,761 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:35:30,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-19 08:35:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:30,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:35:30,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:31,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:31,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:31,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:31,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:31,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:31,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:31,250 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-11-19 08:35:31,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2022-11-19 08:35:31,340 INFO L321 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2022-11-19 08:35:31,341 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 69 treesize of output 68 [2022-11-19 08:35:31,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:35:31,470 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:35:31,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [64406421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:31,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:35:31,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [2, 2] total 5 [2022-11-19 08:35:31,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800293675] [2022-11-19 08:35:31,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:31,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:35:31,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:31,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:35:31,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:35:31,472 INFO L87 Difference]: Start difference. First operand 3749 states and 16566 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:31,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:31,762 INFO L93 Difference]: Finished difference Result 3748 states and 16565 transitions. [2022-11-19 08:35:31,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:35:31,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 08:35:31,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:31,803 INFO L225 Difference]: With dead ends: 3748 [2022-11-19 08:35:31,803 INFO L226 Difference]: Without dead ends: 3748 [2022-11-19 08:35:31,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:35:31,807 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:31,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-11-19 08:35:31,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2022-11-19 08:35:31,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 3748. [2022-11-19 08:35:31,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3748 states, 3347 states have (on average 4.949208246190619) internal successors, (16565), 3747 states have internal predecessors, (16565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:31,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3748 states to 3748 states and 16565 transitions. [2022-11-19 08:35:31,999 INFO L78 Accepts]: Start accepts. Automaton has 3748 states and 16565 transitions. Word has length 3 [2022-11-19 08:35:32,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:32,000 INFO L495 AbstractCegarLoop]: Abstraction has 3748 states and 16565 transitions. [2022-11-19 08:35:32,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:32,000 INFO L276 IsEmpty]: Start isEmpty. Operand 3748 states and 16565 transitions. [2022-11-19 08:35:32,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 08:35:32,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:32,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 08:35:32,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:32,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:32,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:35:32,427 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:35:32,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:32,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1191600, now seen corresponding path program 1 times [2022-11-19 08:35:32,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:32,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206881843] [2022-11-19 08:35:32,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:32,472 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:32,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:32,475 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:32,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-19 08:35:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:32,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:35:32,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:32,763 INFO L321 Elim1Store]: treesize reduction 214, result has 11.9 percent of original size [2022-11-19 08:35:32,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 69 [2022-11-19 08:35:32,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:35:32,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:35:32,939 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:32,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206881843] [2022-11-19 08:35:32,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206881843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:32,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:35:32,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:35:32,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885551742] [2022-11-19 08:35:32,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:32,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:35:32,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:32,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:35:32,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:35:32,942 INFO L87 Difference]: Start difference. First operand 3748 states and 16565 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:33,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:33,214 INFO L93 Difference]: Finished difference Result 3747 states and 16564 transitions. [2022-11-19 08:35:33,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:35:33,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 08:35:33,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:33,246 INFO L225 Difference]: With dead ends: 3747 [2022-11-19 08:35:33,247 INFO L226 Difference]: Without dead ends: 3747 [2022-11-19 08:35:33,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:35:33,249 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:33,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-11-19 08:35:33,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3747 states. [2022-11-19 08:35:33,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3747 to 3747. [2022-11-19 08:35:33,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3747 states, 3347 states have (on average 4.948909471168211) internal successors, (16564), 3746 states have internal predecessors, (16564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:33,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3747 states to 3747 states and 16564 transitions. [2022-11-19 08:35:33,407 INFO L78 Accepts]: Start accepts. Automaton has 3747 states and 16564 transitions. Word has length 3 [2022-11-19 08:35:33,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:33,407 INFO L495 AbstractCegarLoop]: Abstraction has 3747 states and 16564 transitions. [2022-11-19 08:35:33,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:33,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3747 states and 16564 transitions. [2022-11-19 08:35:33,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 08:35:33,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:33,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 08:35:33,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:33,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:33,621 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:35:33,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:33,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1191420, now seen corresponding path program 1 times [2022-11-19 08:35:33,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:33,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278657492] [2022-11-19 08:35:33,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:33,623 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:33,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:33,625 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:33,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-19 08:35:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:33,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:35:33,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:33,971 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:35:33,972 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:35:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:34,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:34,315 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:34,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278657492] [2022-11-19 08:35:34,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278657492] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:34,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [207850318] [2022-11-19 08:35:34,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:34,316 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:35:34,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:35:34,318 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:35:34,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-19 08:35:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:34,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:35:34,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:34,798 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:35:34,798 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:35:34,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:34,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:34,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:34,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [207850318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:34,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422529704] [2022-11-19 08:35:34,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:34,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:35:34,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:35:34,933 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:35:34,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:35:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:35,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:35:35,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:35,322 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:35:35,323 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:35:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:35,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:35,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422529704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:35,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:35:35,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-19 08:35:35,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70032881] [2022-11-19 08:35:35,614 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:35:35,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:35:35,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:35,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:35:35,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:35:35,616 INFO L87 Difference]: Start difference. First operand 3747 states and 16564 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:37,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:37,953 INFO L93 Difference]: Finished difference Result 14979 states and 66244 transitions. [2022-11-19 08:35:37,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:35:37,954 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 08:35:37,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:38,116 INFO L225 Difference]: With dead ends: 14979 [2022-11-19 08:35:38,116 INFO L226 Difference]: Without dead ends: 14979 [2022-11-19 08:35:38,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:35:38,119 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 560 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:38,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 0 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-19 08:35:38,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14979 states. [2022-11-19 08:35:38,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14979 to 3750. [2022-11-19 08:35:38,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3750 states, 3350 states have (on average 4.946268656716418) internal successors, (16570), 3749 states have internal predecessors, (16570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:38,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3750 states to 3750 states and 16570 transitions. [2022-11-19 08:35:38,523 INFO L78 Accepts]: Start accepts. Automaton has 3750 states and 16570 transitions. Word has length 3 [2022-11-19 08:35:38,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:38,523 INFO L495 AbstractCegarLoop]: Abstraction has 3750 states and 16570 transitions. [2022-11-19 08:35:38,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:38,524 INFO L276 IsEmpty]: Start isEmpty. Operand 3750 states and 16570 transitions. [2022-11-19 08:35:38,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 08:35:38,524 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:38,524 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 08:35:38,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:38,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:38,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:39,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:35:39,128 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:35:39,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:39,129 INFO L85 PathProgramCache]: Analyzing trace with hash 36992668, now seen corresponding path program 1 times [2022-11-19 08:35:39,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:39,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279733945] [2022-11-19 08:35:39,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:39,129 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 [2022-11-19 08:35:39,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:39,130 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:39,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-19 08:35:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:39,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:35:39,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:39,522 INFO L321 Elim1Store]: treesize reduction 146, result has 27.4 percent of original size [2022-11-19 08:35:39,522 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 4 case distinctions, treesize of input 22 treesize of output 64 [2022-11-19 08:35:39,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:39,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:35:39,676 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:39,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279733945] [2022-11-19 08:35:39,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1279733945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:39,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:35:39,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:35:39,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594543930] [2022-11-19 08:35:39,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:39,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:35:39,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:39,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:35:39,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:35:39,679 INFO L87 Difference]: Start difference. First operand 3750 states and 16570 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:40,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:40,458 INFO L93 Difference]: Finished difference Result 4576 states and 20596 transitions. [2022-11-19 08:35:40,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:35:40,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 08:35:40,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:40,500 INFO L225 Difference]: With dead ends: 4576 [2022-11-19 08:35:40,500 INFO L226 Difference]: Without dead ends: 4576 [2022-11-19 08:35:40,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:35:40,501 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 139 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:40,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 0 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:35:40,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4576 states. [2022-11-19 08:35:40,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4576 to 4228. [2022-11-19 08:35:40,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 3828 states have (on average 5.129310344827586) internal successors, (19635), 4227 states have internal predecessors, (19635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:40,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 19635 transitions. [2022-11-19 08:35:40,752 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 19635 transitions. Word has length 4 [2022-11-19 08:35:40,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:40,752 INFO L495 AbstractCegarLoop]: Abstraction has 4228 states and 19635 transitions. [2022-11-19 08:35:40,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:40,753 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 19635 transitions. [2022-11-19 08:35:40,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 08:35:40,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:40,754 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 08:35:40,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:40,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:40,970 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:35:40,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:40,970 INFO L85 PathProgramCache]: Analyzing trace with hash 36992669, now seen corresponding path program 1 times [2022-11-19 08:35:40,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:40,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751157047] [2022-11-19 08:35:40,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:40,971 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:40,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:40,972 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:40,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-19 08:35:41,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:41,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:35:41,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:41,256 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-19 08:35:41,256 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 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-19 08:35:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:41,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:35:41,283 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:41,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751157047] [2022-11-19 08:35:41,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751157047] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:41,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:35:41,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:35:41,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766150870] [2022-11-19 08:35:41,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:41,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:35:41,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:41,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:35:41,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:35:41,285 INFO L87 Difference]: Start difference. First operand 4228 states and 19635 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:41,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:41,573 INFO L93 Difference]: Finished difference Result 2028 states and 9019 transitions. [2022-11-19 08:35:41,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:35:41,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 08:35:41,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:41,589 INFO L225 Difference]: With dead ends: 2028 [2022-11-19 08:35:41,590 INFO L226 Difference]: Without dead ends: 2028 [2022-11-19 08:35:41,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:35:41,591 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 94 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:41,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 0 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:35:41,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2022-11-19 08:35:41,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 2028. [2022-11-19 08:35:41,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 1923 states have (on average 4.690067602704108) internal successors, (9019), 2027 states have internal predecessors, (9019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:41,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 9019 transitions. [2022-11-19 08:35:41,692 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 9019 transitions. Word has length 4 [2022-11-19 08:35:41,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:41,692 INFO L495 AbstractCegarLoop]: Abstraction has 2028 states and 9019 transitions. [2022-11-19 08:35:41,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:41,693 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 9019 transitions. [2022-11-19 08:35:41,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 08:35:41,693 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:41,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 08:35:41,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:41,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:41,907 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:35:41,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:41,908 INFO L85 PathProgramCache]: Analyzing trace with hash 36992718, now seen corresponding path program 1 times [2022-11-19 08:35:41,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:41,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1155826776] [2022-11-19 08:35:41,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:41,909 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:41,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:41,910 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:41,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-19 08:35:42,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:42,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:35:42,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:42,189 INFO L321 Elim1Store]: treesize reduction 194, result has 13.0 percent of original size [2022-11-19 08:35:42,190 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 7 case distinctions, treesize of input 49 treesize of output 62 [2022-11-19 08:35:42,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:42,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:35:42,399 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:42,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1155826776] [2022-11-19 08:35:42,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1155826776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:42,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:35:42,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:35:42,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626702992] [2022-11-19 08:35:42,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:42,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:35:42,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:42,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:35:42,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:35:42,401 INFO L87 Difference]: Start difference. First operand 2028 states and 9019 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:42,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:42,618 INFO L93 Difference]: Finished difference Result 2030 states and 9024 transitions. [2022-11-19 08:35:42,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:35:42,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 08:35:42,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:42,628 INFO L225 Difference]: With dead ends: 2030 [2022-11-19 08:35:42,628 INFO L226 Difference]: Without dead ends: 2030 [2022-11-19 08:35:42,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:35:42,629 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:42,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-11-19 08:35:42,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2022-11-19 08:35:42,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 2030. [2022-11-19 08:35:42,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 1925 states have (on average 4.687792207792207) internal successors, (9024), 2029 states have internal predecessors, (9024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:42,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 9024 transitions. [2022-11-19 08:35:42,728 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 9024 transitions. Word has length 4 [2022-11-19 08:35:42,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:42,728 INFO L495 AbstractCegarLoop]: Abstraction has 2030 states and 9024 transitions. [2022-11-19 08:35:42,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:42,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 9024 transitions. [2022-11-19 08:35:42,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 08:35:42,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:42,730 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 08:35:42,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:42,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:42,941 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:35:42,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:42,942 INFO L85 PathProgramCache]: Analyzing trace with hash 36992719, now seen corresponding path program 1 times [2022-11-19 08:35:42,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:42,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635883933] [2022-11-19 08:35:42,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:42,943 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:42,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:42,944 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:42,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-19 08:35:43,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:43,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:35:43,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:43,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:43,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:43,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:43,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:43,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:43,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:43,288 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-11-19 08:35:43,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2022-11-19 08:35:43,328 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 08:35:43,328 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 31 treesize of output 27 [2022-11-19 08:35:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:43,429 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:35:43,429 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:43,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635883933] [2022-11-19 08:35:43,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1635883933] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:43,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:35:43,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:35:43,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228552451] [2022-11-19 08:35:43,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:43,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:35:43,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:43,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:35:43,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:35:43,431 INFO L87 Difference]: Start difference. First operand 2030 states and 9024 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:43,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:43,657 INFO L93 Difference]: Finished difference Result 2030 states and 9023 transitions. [2022-11-19 08:35:43,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:35:43,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 08:35:43,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:43,668 INFO L225 Difference]: With dead ends: 2030 [2022-11-19 08:35:43,668 INFO L226 Difference]: Without dead ends: 2030 [2022-11-19 08:35:43,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:35:43,669 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:43,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-11-19 08:35:43,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2022-11-19 08:35:43,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 2030. [2022-11-19 08:35:43,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 1925 states have (on average 4.6872727272727275) internal successors, (9023), 2029 states have internal predecessors, (9023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:43,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 9023 transitions. [2022-11-19 08:35:43,738 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 9023 transitions. Word has length 4 [2022-11-19 08:35:43,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:43,738 INFO L495 AbstractCegarLoop]: Abstraction has 2030 states and 9023 transitions. [2022-11-19 08:35:43,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:43,739 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 9023 transitions. [2022-11-19 08:35:43,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 08:35:43,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:43,739 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 08:35:43,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:43,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:43,958 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:35:43,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:43,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1146773777, now seen corresponding path program 1 times [2022-11-19 08:35:43,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:43,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622911262] [2022-11-19 08:35:43,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:43,959 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 [2022-11-19 08:35:43,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:43,961 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:43,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-19 08:35:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:44,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:35:44,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:44,345 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:35:44,346 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:35:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:44,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:35:44,472 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:44,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622911262] [2022-11-19 08:35:44,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622911262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:44,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:35:44,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:35:44,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622116717] [2022-11-19 08:35:44,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:44,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:35:44,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:44,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:35:44,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:35:44,474 INFO L87 Difference]: Start difference. First operand 2030 states and 9023 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) [2022-11-19 08:35:44,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:44,843 INFO L93 Difference]: Finished difference Result 2030 states and 9022 transitions. [2022-11-19 08:35:44,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:35:44,844 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 [2022-11-19 08:35:44,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:44,853 INFO L225 Difference]: With dead ends: 2030 [2022-11-19 08:35:44,853 INFO L226 Difference]: Without dead ends: 2030 [2022-11-19 08:35:44,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:35:44,854 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:44,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-11-19 08:35:44,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2022-11-19 08:35:44,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 2030. [2022-11-19 08:35:44,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 1925 states have (on average 4.686753246753247) internal successors, (9022), 2029 states have internal predecessors, (9022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:44,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 9022 transitions. [2022-11-19 08:35:44,910 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 9022 transitions. Word has length 5 [2022-11-19 08:35:44,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:44,911 INFO L495 AbstractCegarLoop]: Abstraction has 2030 states and 9022 transitions. [2022-11-19 08:35:44,911 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) [2022-11-19 08:35:44,911 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 9022 transitions. [2022-11-19 08:35:44,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 08:35:44,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:44,911 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 08:35:44,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-11-19 08:35:45,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:45,112 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:35:45,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:45,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1146776350, now seen corresponding path program 1 times [2022-11-19 08:35:45,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:45,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2070434179] [2022-11-19 08:35:45,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:45,113 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:45,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:45,114 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:45,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-19 08:35:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:45,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:35:45,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:45,340 INFO L321 Elim1Store]: treesize reduction 194, result has 13.0 percent of original size [2022-11-19 08:35:45,340 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 7 case distinctions, treesize of input 49 treesize of output 62 [2022-11-19 08:35:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:45,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:35:45,559 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:45,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2070434179] [2022-11-19 08:35:45,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2070434179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:45,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:35:45,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:35:45,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654605783] [2022-11-19 08:35:45,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:45,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:35:45,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:45,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:35:45,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:35:45,561 INFO L87 Difference]: Start difference. First operand 2030 states and 9022 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:45,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:45,767 INFO L93 Difference]: Finished difference Result 2031 states and 9024 transitions. [2022-11-19 08:35:45,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:35:45,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 08:35:45,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:45,777 INFO L225 Difference]: With dead ends: 2031 [2022-11-19 08:35:45,777 INFO L226 Difference]: Without dead ends: 2031 [2022-11-19 08:35:45,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:35:45,778 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:45,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-11-19 08:35:45,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2022-11-19 08:35:45,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 2031. [2022-11-19 08:35:45,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 1926 states have (on average 4.685358255451713) internal successors, (9024), 2030 states have internal predecessors, (9024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:45,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 9024 transitions. [2022-11-19 08:35:45,845 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 9024 transitions. Word has length 5 [2022-11-19 08:35:45,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:45,846 INFO L495 AbstractCegarLoop]: Abstraction has 2031 states and 9024 transitions. [2022-11-19 08:35:45,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:45,846 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 9024 transitions. [2022-11-19 08:35:45,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 08:35:45,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:45,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 08:35:45,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:46,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:46,058 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:35:46,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:46,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1146776351, now seen corresponding path program 1 times [2022-11-19 08:35:46,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:46,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64974409] [2022-11-19 08:35:46,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:46,059 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:46,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:46,060 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:46,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-19 08:35:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:46,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:35:46,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:46,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:46,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:46,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:46,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:46,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:46,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:46,366 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-11-19 08:35:46,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2022-11-19 08:35:46,408 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 08:35:46,408 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 31 treesize of output 27 [2022-11-19 08:35:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:46,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:35:46,522 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:46,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64974409] [2022-11-19 08:35:46,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64974409] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:46,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:35:46,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:35:46,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964700142] [2022-11-19 08:35:46,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:46,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:35:46,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:46,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:35:46,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:35:46,524 INFO L87 Difference]: Start difference. First operand 2031 states and 9024 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:46,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:46,730 INFO L93 Difference]: Finished difference Result 2031 states and 9023 transitions. [2022-11-19 08:35:46,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:35:46,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 08:35:46,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:46,741 INFO L225 Difference]: With dead ends: 2031 [2022-11-19 08:35:46,741 INFO L226 Difference]: Without dead ends: 2031 [2022-11-19 08:35:46,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:35:46,742 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:46,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-11-19 08:35:46,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2022-11-19 08:35:46,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 2031. [2022-11-19 08:35:46,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 1926 states have (on average 4.684839044652128) internal successors, (9023), 2030 states have internal predecessors, (9023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:46,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 9023 transitions. [2022-11-19 08:35:46,808 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 9023 transitions. Word has length 5 [2022-11-19 08:35:46,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:46,808 INFO L495 AbstractCegarLoop]: Abstraction has 2031 states and 9023 transitions. [2022-11-19 08:35:46,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:46,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 9023 transitions. [2022-11-19 08:35:46,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 08:35:46,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:46,809 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 08:35:46,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:47,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:47,023 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:35:47,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:47,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1145158336, now seen corresponding path program 1 times [2022-11-19 08:35:47,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:47,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1293537339] [2022-11-19 08:35:47,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:47,024 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:47,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:47,032 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:47,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-19 08:35:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:47,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:35:47,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:47,293 INFO L321 Elim1Store]: treesize reduction 190, result has 14.8 percent of original size [2022-11-19 08:35:47,294 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 7 case distinctions, treesize of input 49 treesize of output 66 [2022-11-19 08:35:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:35:47,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:35:47,430 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:47,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1293537339] [2022-11-19 08:35:47,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1293537339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:47,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:35:47,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:35:47,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240897659] [2022-11-19 08:35:47,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:47,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:35:47,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:47,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:35:47,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:35:47,432 INFO L87 Difference]: Start difference. First operand 2031 states and 9023 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:47,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:47,656 INFO L93 Difference]: Finished difference Result 2030 states and 9020 transitions. [2022-11-19 08:35:47,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:35:47,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 08:35:47,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:47,666 INFO L225 Difference]: With dead ends: 2030 [2022-11-19 08:35:47,666 INFO L226 Difference]: Without dead ends: 2030 [2022-11-19 08:35:47,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:35:47,667 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:47,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-11-19 08:35:47,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2022-11-19 08:35:47,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 2030. [2022-11-19 08:35:47,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 1925 states have (on average 4.685714285714286) internal successors, (9020), 2029 states have internal predecessors, (9020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:47,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 9020 transitions. [2022-11-19 08:35:47,736 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 9020 transitions. Word has length 5 [2022-11-19 08:35:47,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:47,736 INFO L495 AbstractCegarLoop]: Abstraction has 2030 states and 9020 transitions. [2022-11-19 08:35:47,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:47,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 9020 transitions. [2022-11-19 08:35:47,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 08:35:47,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:47,737 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 08:35:47,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:47,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:47,950 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:35:47,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:47,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1145158337, now seen corresponding path program 1 times [2022-11-19 08:35:47,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:47,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899206373] [2022-11-19 08:35:47,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:47,951 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:47,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:47,952 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:47,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-19 08:35:48,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:48,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 08:35:48,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:48,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:48,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:48,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:48,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:48,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:48,375 INFO L321 Elim1Store]: treesize reduction 61, result has 39.6 percent of original size [2022-11-19 08:35:48,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-11-19 08:35:48,413 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 08:35:48,414 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 31 treesize of output 27 [2022-11-19 08:35:49,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:49,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:49,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:49,446 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:49,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899206373] [2022-11-19 08:35:49,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899206373] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:49,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [373518517] [2022-11-19 08:35:49,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:49,447 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:35:49,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:35:49,451 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:35:49,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-19 08:35:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:49,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:35:49,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:49,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:49,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:49,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:49,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:50,011 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-19 08:35:50,012 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-19 08:35:50,054 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 08:35:50,054 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 61 treesize of output 57 [2022-11-19 08:35:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:35:50,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:35:50,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [373518517] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:50,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:35:50,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-19 08:35:50,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943557282] [2022-11-19 08:35:50,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:50,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:35:50,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:50,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:35:50,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:35:50,282 INFO L87 Difference]: Start difference. First operand 2030 states and 9020 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:50,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:50,510 INFO L93 Difference]: Finished difference Result 2026 states and 9010 transitions. [2022-11-19 08:35:50,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:35:50,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 08:35:50,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:50,520 INFO L225 Difference]: With dead ends: 2026 [2022-11-19 08:35:50,520 INFO L226 Difference]: Without dead ends: 2026 [2022-11-19 08:35:50,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:35:50,521 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:50,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2022-11-19 08:35:50,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2022-11-19 08:35:50,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 2026. [2022-11-19 08:35:50,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 1922 states have (on average 4.687825182101977) internal successors, (9010), 2025 states have internal predecessors, (9010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:50,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 9010 transitions. [2022-11-19 08:35:50,583 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 9010 transitions. Word has length 5 [2022-11-19 08:35:50,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:50,583 INFO L495 AbstractCegarLoop]: Abstraction has 2026 states and 9010 transitions. [2022-11-19 08:35:50,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:50,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 9010 transitions. [2022-11-19 08:35:50,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 08:35:50,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:50,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 08:35:50,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:50,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:50,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:35:50,999 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:35:50,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:51,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1190292596, now seen corresponding path program 1 times [2022-11-19 08:35:51,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:51,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734876489] [2022-11-19 08:35:51,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:51,000 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:51,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:51,002 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:51,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-19 08:35:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:51,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:35:51,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:51,294 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-11-19 08:35:51,295 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 5 case distinctions, treesize of input 36 treesize of output 51 [2022-11-19 08:35:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:51,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:35:51,526 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:51,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734876489] [2022-11-19 08:35:51,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734876489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:51,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:35:51,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:35:51,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383544039] [2022-11-19 08:35:51,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:51,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:35:51,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:51,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:35:51,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:35:51,528 INFO L87 Difference]: Start difference. First operand 2026 states and 9010 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:51,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:51,732 INFO L93 Difference]: Finished difference Result 2028 states and 9019 transitions. [2022-11-19 08:35:51,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:35:51,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 08:35:51,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:51,741 INFO L225 Difference]: With dead ends: 2028 [2022-11-19 08:35:51,741 INFO L226 Difference]: Without dead ends: 2028 [2022-11-19 08:35:51,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:35:51,742 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:51,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-11-19 08:35:51,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2022-11-19 08:35:51,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 2028. [2022-11-19 08:35:51,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 1924 states have (on average 4.6876299376299375) internal successors, (9019), 2027 states have internal predecessors, (9019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:51,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 9019 transitions. [2022-11-19 08:35:51,812 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 9019 transitions. Word has length 6 [2022-11-19 08:35:51,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:51,812 INFO L495 AbstractCegarLoop]: Abstraction has 2028 states and 9019 transitions. [2022-11-19 08:35:51,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:51,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 9019 transitions. [2022-11-19 08:35:51,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 08:35:51,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:51,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 08:35:51,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:52,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:52,027 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:35:52,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:52,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1190292597, now seen corresponding path program 1 times [2022-11-19 08:35:52,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:52,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181942686] [2022-11-19 08:35:52,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:52,028 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:52,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:52,029 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:52,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-19 08:35:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:52,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:35:52,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:52,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:52,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:52,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:52,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:35:52,384 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:35:52,386 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-19 08:35:52,412 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 18 treesize of output 16 [2022-11-19 08:35:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:52,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:35:52,541 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:52,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181942686] [2022-11-19 08:35:52,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181942686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:35:52,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:35:52,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:35:52,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124147137] [2022-11-19 08:35:52,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:35:52,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:35:52,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:52,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:35:52,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:35:52,543 INFO L87 Difference]: Start difference. First operand 2028 states and 9019 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:52,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:35:52,729 INFO L93 Difference]: Finished difference Result 2028 states and 9018 transitions. [2022-11-19 08:35:52,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:35:52,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 08:35:52,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:35:52,738 INFO L225 Difference]: With dead ends: 2028 [2022-11-19 08:35:52,738 INFO L226 Difference]: Without dead ends: 2028 [2022-11-19 08:35:52,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:35:52,739 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:35:52,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-11-19 08:35:52,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2022-11-19 08:35:52,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 2028. [2022-11-19 08:35:52,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 1924 states have (on average 4.6871101871101875) internal successors, (9018), 2027 states have internal predecessors, (9018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:52,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 9018 transitions. [2022-11-19 08:35:52,812 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 9018 transitions. Word has length 6 [2022-11-19 08:35:52,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:35:52,812 INFO L495 AbstractCegarLoop]: Abstraction has 2028 states and 9018 transitions. [2022-11-19 08:35:52,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:35:52,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 9018 transitions. [2022-11-19 08:35:52,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 08:35:52,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:35:52,814 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 08:35:52,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-19 08:35:53,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:53,027 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:35:53,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:35:53,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1140169567, now seen corresponding path program 1 times [2022-11-19 08:35:53,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:35:53,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2003766201] [2022-11-19 08:35:53,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:53,028 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:35:53,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:35:53,029 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:35:53,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-19 08:35:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:53,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:35:53,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:53,458 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:35:53,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:35:53,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:53,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:53,776 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:35:53,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2003766201] [2022-11-19 08:35:53,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2003766201] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:53,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1583660034] [2022-11-19 08:35:53,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:53,777 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:35:53,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:35:53,778 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:35:53,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-19 08:35:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:53,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:35:54,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:54,231 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:35:54,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:35:54,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:54,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:54,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1583660034] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:54,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897651843] [2022-11-19 08:35:54,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:35:54,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:35:54,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:35:54,823 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:35:54,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-19 08:35:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:35:54,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:35:54,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:35:55,184 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:35:55,184 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:35:55,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:55,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:35:55,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:35:55,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897651843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:35:55,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:35:55,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 14 [2022-11-19 08:35:55,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408227455] [2022-11-19 08:35:55,430 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:35:55,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 08:35:55,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:35:55,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 08:35:55,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:35:55,431 INFO L87 Difference]: Start difference. First operand 2028 states and 9018 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:00,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:00,010 INFO L93 Difference]: Finished difference Result 4581 states and 19841 transitions. [2022-11-19 08:36:00,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:36:00,012 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 08:36:00,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:00,039 INFO L225 Difference]: With dead ends: 4581 [2022-11-19 08:36:00,040 INFO L226 Difference]: Without dead ends: 4581 [2022-11-19 08:36:00,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-19 08:36:00,041 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 202 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:00,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 0 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 823 Invalid, 0 Unknown, 174 Unchecked, 4.3s Time] [2022-11-19 08:36:00,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4581 states. [2022-11-19 08:36:00,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4581 to 2344. [2022-11-19 08:36:00,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2240 states have (on average 4.570535714285715) internal successors, (10238), 2343 states have internal predecessors, (10238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:00,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 10238 transitions. [2022-11-19 08:36:00,195 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 10238 transitions. Word has length 6 [2022-11-19 08:36:00,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:00,195 INFO L495 AbstractCegarLoop]: Abstraction has 2344 states and 10238 transitions. [2022-11-19 08:36:00,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:00,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 10238 transitions. [2022-11-19 08:36:00,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 08:36:00,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:00,196 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 08:36:00,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:00,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:00,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:00,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:00,800 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:36:00,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:00,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1140172140, now seen corresponding path program 1 times [2022-11-19 08:36:00,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:36:00,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844055013] [2022-11-19 08:36:00,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:00,802 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:00,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:36:00,803 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:36:00,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-19 08:36:00,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:00,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:36:00,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:01,106 INFO L321 Elim1Store]: treesize reduction 190, result has 14.8 percent of original size [2022-11-19 08:36:01,107 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 7 case distinctions, treesize of input 49 treesize of output 66 [2022-11-19 08:36:01,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:36:01,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:36:01,263 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:36:01,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844055013] [2022-11-19 08:36:01,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844055013] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:01,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:36:01,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:36:01,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005058454] [2022-11-19 08:36:01,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:01,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:36:01,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:36:01,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:36:01,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:36:01,265 INFO L87 Difference]: Start difference. First operand 2344 states and 10238 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:01,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:01,466 INFO L93 Difference]: Finished difference Result 2344 states and 10237 transitions. [2022-11-19 08:36:01,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:36:01,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 08:36:01,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:01,476 INFO L225 Difference]: With dead ends: 2344 [2022-11-19 08:36:01,476 INFO L226 Difference]: Without dead ends: 2344 [2022-11-19 08:36:01,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:36:01,477 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:01,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-11-19 08:36:01,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2022-11-19 08:36:01,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2344. [2022-11-19 08:36:01,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2240 states have (on average 4.570089285714285) internal successors, (10237), 2343 states have internal predecessors, (10237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:01,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 10237 transitions. [2022-11-19 08:36:01,538 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 10237 transitions. Word has length 6 [2022-11-19 08:36:01,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:01,539 INFO L495 AbstractCegarLoop]: Abstraction has 2344 states and 10237 transitions. [2022-11-19 08:36:01,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:01,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 10237 transitions. [2022-11-19 08:36:01,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 08:36:01,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:01,540 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 08:36:01,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2022-11-19 08:36:01,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:01,754 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:36:01,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:01,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1140172141, now seen corresponding path program 1 times [2022-11-19 08:36:01,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:36:01,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724837018] [2022-11-19 08:36:01,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:01,755 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:01,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:36:01,756 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:36:01,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-19 08:36:01,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:01,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:36:01,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:01,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:01,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:01,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:01,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:02,151 INFO L321 Elim1Store]: treesize reduction 74, result has 36.8 percent of original size [2022-11-19 08:36:02,151 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 4 case distinctions, treesize of input 20 treesize of output 50 [2022-11-19 08:36:02,197 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-19 08:36:02,197 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 156 treesize of output 155 [2022-11-19 08:36:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:02,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:03,021 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:36:03,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724837018] [2022-11-19 08:36:03,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724837018] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:03,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [222784428] [2022-11-19 08:36:03,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:03,022 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:36:03,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:36:03,023 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:36:03,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-19 08:36:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:03,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:36:03,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:03,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:03,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:03,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:03,516 INFO L321 Elim1Store]: treesize reduction 95, result has 27.5 percent of original size [2022-11-19 08:36:03,516 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 18 treesize of output 46 [2022-11-19 08:36:03,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-19 08:36:03,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:36:03,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:36:03,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [222784428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:03,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:36:03,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-19 08:36:03,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329491031] [2022-11-19 08:36:03,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:03,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:36:03,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:36:03,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:36:03,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:36:03,762 INFO L87 Difference]: Start difference. First operand 2344 states and 10237 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:03,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:03,965 INFO L93 Difference]: Finished difference Result 2343 states and 10235 transitions. [2022-11-19 08:36:03,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:36:03,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 08:36:03,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:03,973 INFO L225 Difference]: With dead ends: 2343 [2022-11-19 08:36:03,973 INFO L226 Difference]: Without dead ends: 2343 [2022-11-19 08:36:03,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:36:03,974 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:03,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2022-11-19 08:36:03,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2022-11-19 08:36:04,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 2343. [2022-11-19 08:36:04,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2240 states have (on average 4.569196428571429) internal successors, (10235), 2342 states have internal predecessors, (10235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:04,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 10235 transitions. [2022-11-19 08:36:04,034 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 10235 transitions. Word has length 6 [2022-11-19 08:36:04,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:04,034 INFO L495 AbstractCegarLoop]: Abstraction has 2343 states and 10235 transitions. [2022-11-19 08:36:04,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:04,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 10235 transitions. [2022-11-19 08:36:04,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 08:36:04,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:04,035 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-19 08:36:04,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:04,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2022-11-19 08:36:04,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:36:04,438 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:36:04,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:04,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1138500106, now seen corresponding path program 2 times [2022-11-19 08:36:04,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:36:04,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1988461714] [2022-11-19 08:36:04,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:36:04,439 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:04,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:36:04,440 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:36:04,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-19 08:36:04,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:36:04,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:36:04,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:36:04,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:04,867 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:36:04,868 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:36:05,050 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:05,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:05,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:05,813 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:36:05,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1988461714] [2022-11-19 08:36:05,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1988461714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:05,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1508304370] [2022-11-19 08:36:05,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:36:05,813 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:36:05,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:36:05,814 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:36:05,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-19 08:36:06,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:36:06,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:36:06,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:36:06,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:06,368 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:36:06,369 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:36:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:06,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:07,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1508304370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:07,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788895458] [2022-11-19 08:36:07,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:36:07,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:07,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:07,574 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:07,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-19 08:36:07,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:36:07,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:36:07,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:36:07,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:08,058 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:36:08,058 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:36:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:08,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:08,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788895458] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:08,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:36:08,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-19 08:36:08,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43224132] [2022-11-19 08:36:08,344 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:36:08,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 08:36:08,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:36:08,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 08:36:08,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-19 08:36:08,346 INFO L87 Difference]: Start difference. First operand 2343 states and 10235 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:16,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:16,615 INFO L93 Difference]: Finished difference Result 18689 states and 82785 transitions. [2022-11-19 08:36:16,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 08:36:16,617 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 08:36:16,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:16,733 INFO L225 Difference]: With dead ends: 18689 [2022-11-19 08:36:16,733 INFO L226 Difference]: Without dead ends: 18689 [2022-11-19 08:36:16,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=152, Invalid=268, Unknown=0, NotChecked=0, Total=420 [2022-11-19 08:36:16,735 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1815 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1432 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1815 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:16,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1815 Valid, 0 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1432 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-11-19 08:36:16,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18689 states. [2022-11-19 08:36:16,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18689 to 2349. [2022-11-19 08:36:16,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2246 states have (on average 4.56233303650935) internal successors, (10247), 2348 states have internal predecessors, (10247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:16,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 10247 transitions. [2022-11-19 08:36:16,962 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 10247 transitions. Word has length 6 [2022-11-19 08:36:16,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:16,962 INFO L495 AbstractCegarLoop]: Abstraction has 2349 states and 10247 transitions. [2022-11-19 08:36:16,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:16,962 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 10247 transitions. [2022-11-19 08:36:16,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:36:16,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:16,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:36:16,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-11-19 08:36:17,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2022-11-19 08:36:17,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-19 08:36:17,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:17,564 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:36:17,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:17,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1755633936, now seen corresponding path program 1 times [2022-11-19 08:36:17,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:36:17,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263283540] [2022-11-19 08:36:17,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:17,565 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:17,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:36:17,566 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:36:17,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-11-19 08:36:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:17,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 08:36:17,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:17,836 INFO L321 Elim1Store]: treesize reduction 180, result has 15.5 percent of original size [2022-11-19 08:36:17,836 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 5 case distinctions, treesize of input 36 treesize of output 55 [2022-11-19 08:36:17,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:17,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:36:17,874 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:36:17,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263283540] [2022-11-19 08:36:17,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1263283540] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:17,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:36:17,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:36:17,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277999690] [2022-11-19 08:36:17,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:17,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:36:17,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:36:17,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:36:17,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:36:17,876 INFO L87 Difference]: Start difference. First operand 2349 states and 10247 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:18,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:18,111 INFO L93 Difference]: Finished difference Result 2312 states and 10136 transitions. [2022-11-19 08:36:18,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:36:18,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:36:18,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:18,120 INFO L225 Difference]: With dead ends: 2312 [2022-11-19 08:36:18,120 INFO L226 Difference]: Without dead ends: 2312 [2022-11-19 08:36:18,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:36:18,121 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:18,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:36:18,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2022-11-19 08:36:18,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 2312. [2022-11-19 08:36:18,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2312 states, 2217 states have (on average 4.571944068561119) internal successors, (10136), 2311 states have internal predecessors, (10136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:18,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 10136 transitions. [2022-11-19 08:36:18,203 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 10136 transitions. Word has length 7 [2022-11-19 08:36:18,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:18,203 INFO L495 AbstractCegarLoop]: Abstraction has 2312 states and 10136 transitions. [2022-11-19 08:36:18,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:18,204 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 10136 transitions. [2022-11-19 08:36:18,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:36:18,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:18,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:36:18,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:18,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:18,418 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:36:18,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:18,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1755633935, now seen corresponding path program 1 times [2022-11-19 08:36:18,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:36:18,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1810483881] [2022-11-19 08:36:18,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:18,419 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:18,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:36:18,420 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:36:18,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-19 08:36:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:18,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:36:18,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:18,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:18,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:18,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:18,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:18,809 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 08:36:18,810 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 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-19 08:36:18,835 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 18 treesize of output 16 [2022-11-19 08:36:18,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:18,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:36:18,970 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:36:18,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1810483881] [2022-11-19 08:36:18,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1810483881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:18,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:36:18,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:36:18,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044583597] [2022-11-19 08:36:18,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:18,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:36:18,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:36:18,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:36:18,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:36:18,971 INFO L87 Difference]: Start difference. First operand 2312 states and 10136 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:19,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:19,154 INFO L93 Difference]: Finished difference Result 2311 states and 10134 transitions. [2022-11-19 08:36:19,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:36:19,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:36:19,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:19,161 INFO L225 Difference]: With dead ends: 2311 [2022-11-19 08:36:19,162 INFO L226 Difference]: Without dead ends: 2311 [2022-11-19 08:36:19,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:36:19,162 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:19,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2022-11-19 08:36:19,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2022-11-19 08:36:19,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 2311. [2022-11-19 08:36:19,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 2216 states have (on average 4.573104693140794) internal successors, (10134), 2310 states have internal predecessors, (10134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:19,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 10134 transitions. [2022-11-19 08:36:19,234 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 10134 transitions. Word has length 7 [2022-11-19 08:36:19,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:19,234 INFO L495 AbstractCegarLoop]: Abstraction has 2311 states and 10134 transitions. [2022-11-19 08:36:19,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:19,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 10134 transitions. [2022-11-19 08:36:19,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:36:19,235 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:19,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:36:19,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-19 08:36:19,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:19,436 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:36:19,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:19,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1755633904, now seen corresponding path program 1 times [2022-11-19 08:36:19,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:36:19,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739338542] [2022-11-19 08:36:19,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:19,437 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:19,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:36:19,438 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:36:19,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-19 08:36:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:19,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:36:19,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:19,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:19,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:19,872 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:36:19,872 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 18 treesize of output 53 [2022-11-19 08:36:19,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2022-11-19 08:36:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:20,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:36:20,055 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:36:20,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739338542] [2022-11-19 08:36:20,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739338542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:20,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:36:20,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:36:20,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63180017] [2022-11-19 08:36:20,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:20,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:36:20,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:36:20,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:36:20,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:36:20,057 INFO L87 Difference]: Start difference. First operand 2311 states and 10134 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:20,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:20,273 INFO L93 Difference]: Finished difference Result 2310 states and 10132 transitions. [2022-11-19 08:36:20,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:36:20,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:36:20,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:20,285 INFO L225 Difference]: With dead ends: 2310 [2022-11-19 08:36:20,285 INFO L226 Difference]: Without dead ends: 2310 [2022-11-19 08:36:20,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:36:20,286 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:20,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2022-11-19 08:36:20,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2022-11-19 08:36:20,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 2310. [2022-11-19 08:36:20,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2310 states, 2215 states have (on average 4.574266365688487) internal successors, (10132), 2309 states have internal predecessors, (10132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:20,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2310 states to 2310 states and 10132 transitions. [2022-11-19 08:36:20,360 INFO L78 Accepts]: Start accepts. Automaton has 2310 states and 10132 transitions. Word has length 7 [2022-11-19 08:36:20,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:20,361 INFO L495 AbstractCegarLoop]: Abstraction has 2310 states and 10132 transitions. [2022-11-19 08:36:20,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:20,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2310 states and 10132 transitions. [2022-11-19 08:36:20,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:36:20,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:20,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:36:20,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:20,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:20,582 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:36:20,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:20,582 INFO L85 PathProgramCache]: Analyzing trace with hash 985562087, now seen corresponding path program 1 times [2022-11-19 08:36:20,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:36:20,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919200921] [2022-11-19 08:36:20,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:20,583 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:20,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:36:20,584 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:36:20,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-19 08:36:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:20,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:36:20,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:20,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:20,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:20,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:21,000 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-19 08:36:21,001 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 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-19 08:36:21,024 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 18 treesize of output 16 [2022-11-19 08:36:21,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:21,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:21,597 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:36:21,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919200921] [2022-11-19 08:36:21,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919200921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:21,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [312908182] [2022-11-19 08:36:21,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:21,598 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:36:21,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:36:21,599 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:36:21,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-19 08:36:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:21,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:36:21,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:22,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:22,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:22,225 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:36:22,225 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 18 treesize of output 53 [2022-11-19 08:36:22,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 510 treesize of output 494 [2022-11-19 08:36:22,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:36:22,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:36:22,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [312908182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:22,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:36:22,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-19 08:36:22,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891541161] [2022-11-19 08:36:22,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:22,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:36:22,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:36:22,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:36:22,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:36:22,416 INFO L87 Difference]: Start difference. First operand 2310 states and 10132 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:22,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:22,605 INFO L93 Difference]: Finished difference Result 2309 states and 10127 transitions. [2022-11-19 08:36:22,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:36:22,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:36:22,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:22,613 INFO L225 Difference]: With dead ends: 2309 [2022-11-19 08:36:22,614 INFO L226 Difference]: Without dead ends: 2309 [2022-11-19 08:36:22,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:36:22,614 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:22,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-11-19 08:36:22,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2022-11-19 08:36:22,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 2309. [2022-11-19 08:36:22,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 2214 states have (on average 4.574074074074074) internal successors, (10127), 2308 states have internal predecessors, (10127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:22,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 10127 transitions. [2022-11-19 08:36:22,669 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 10127 transitions. Word has length 7 [2022-11-19 08:36:22,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:22,669 INFO L495 AbstractCegarLoop]: Abstraction has 2309 states and 10127 transitions. [2022-11-19 08:36:22,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:22,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 10127 transitions. [2022-11-19 08:36:22,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:36:22,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:22,670 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-11-19 08:36:22,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:22,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-19 08:36:23,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:23,071 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:36:23,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:23,071 INFO L85 PathProgramCache]: Analyzing trace with hash 935439057, now seen corresponding path program 2 times [2022-11-19 08:36:23,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:36:23,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930178447] [2022-11-19 08:36:23,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:36:23,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:23,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:36:23,073 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:36:23,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-19 08:36:23,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 08:36:23,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:36:23,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:36:23,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:23,380 INFO L321 Elim1Store]: treesize reduction 190, result has 14.8 percent of original size [2022-11-19 08:36:23,381 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 7 case distinctions, treesize of input 49 treesize of output 66 [2022-11-19 08:36:23,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:36:23,585 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:36:23,585 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:36:23,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930178447] [2022-11-19 08:36:23,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1930178447] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:23,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:36:23,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:36:23,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003508636] [2022-11-19 08:36:23,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:23,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:36:23,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:36:23,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:36:23,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:36:23,587 INFO L87 Difference]: Start difference. First operand 2309 states and 10127 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:23,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:23,788 INFO L93 Difference]: Finished difference Result 2306 states and 10120 transitions. [2022-11-19 08:36:23,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:36:23,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:36:23,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:23,797 INFO L225 Difference]: With dead ends: 2306 [2022-11-19 08:36:23,798 INFO L226 Difference]: Without dead ends: 2306 [2022-11-19 08:36:23,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:36:23,798 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:23,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2022-11-19 08:36:23,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2022-11-19 08:36:23,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 2306. [2022-11-19 08:36:23,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 2212 states have (on average 4.575045207956601) internal successors, (10120), 2305 states have internal predecessors, (10120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:23,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 10120 transitions. [2022-11-19 08:36:23,856 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 10120 transitions. Word has length 7 [2022-11-19 08:36:23,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:23,857 INFO L495 AbstractCegarLoop]: Abstraction has 2306 states and 10120 transitions. [2022-11-19 08:36:23,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:23,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 10120 transitions. [2022-11-19 08:36:23,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 08:36:23,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:23,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:36:23,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-11-19 08:36:24,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:24,072 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:36:24,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:24,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1409912868, now seen corresponding path program 1 times [2022-11-19 08:36:24,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:36:24,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288109236] [2022-11-19 08:36:24,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:24,073 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:24,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:36:24,075 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:36:24,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-19 08:36:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:24,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:36:24,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:24,476 INFO L321 Elim1Store]: treesize reduction 146, result has 27.4 percent of original size [2022-11-19 08:36:24,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 64 [2022-11-19 08:36:24,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:24,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:36:24,664 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:36:24,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288109236] [2022-11-19 08:36:24,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288109236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:24,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:36:24,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:36:24,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018592853] [2022-11-19 08:36:24,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:24,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:36:24,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:36:24,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:36:24,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:36:24,666 INFO L87 Difference]: Start difference. First operand 2306 states and 10120 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:25,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:25,388 INFO L93 Difference]: Finished difference Result 2952 states and 12950 transitions. [2022-11-19 08:36:25,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:36:25,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 08:36:25,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:25,398 INFO L225 Difference]: With dead ends: 2952 [2022-11-19 08:36:25,398 INFO L226 Difference]: Without dead ends: 2952 [2022-11-19 08:36:25,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:36:25,399 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 110 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:25,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 0 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:36:25,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2952 states. [2022-11-19 08:36:25,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2952 to 2787. [2022-11-19 08:36:25,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2693 states have (on average 4.663572224285184) internal successors, (12559), 2786 states have internal predecessors, (12559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:25,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 12559 transitions. [2022-11-19 08:36:25,461 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 12559 transitions. Word has length 8 [2022-11-19 08:36:25,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:25,461 INFO L495 AbstractCegarLoop]: Abstraction has 2787 states and 12559 transitions. [2022-11-19 08:36:25,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:25,462 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 12559 transitions. [2022-11-19 08:36:25,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 08:36:25,462 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:25,462 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:36:25,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-11-19 08:36:25,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:25,663 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:36:25,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:25,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1409912918, now seen corresponding path program 1 times [2022-11-19 08:36:25,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:36:25,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674268762] [2022-11-19 08:36:25,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:25,664 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:25,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:36:25,665 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:36:25,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-19 08:36:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:25,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:36:25,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:25,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:26,098 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-19 08:36:26,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-19 08:36:26,121 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 1175 treesize of output 1159 [2022-11-19 08:36:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:26,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:36:26,271 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:36:26,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674268762] [2022-11-19 08:36:26,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674268762] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:26,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:36:26,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:36:26,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710403059] [2022-11-19 08:36:26,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:26,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:36:26,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:36:26,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:36:26,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:36:26,273 INFO L87 Difference]: Start difference. First operand 2787 states and 12559 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:26,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:26,533 INFO L93 Difference]: Finished difference Result 2672 states and 12064 transitions. [2022-11-19 08:36:26,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:36:26,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 08:36:26,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:26,543 INFO L225 Difference]: With dead ends: 2672 [2022-11-19 08:36:26,543 INFO L226 Difference]: Without dead ends: 2672 [2022-11-19 08:36:26,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:36:26,544 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:26,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 0 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:36:26,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2022-11-19 08:36:26,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2672. [2022-11-19 08:36:26,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2672 states, 2588 states have (on average 4.661514683153014) internal successors, (12064), 2671 states have internal predecessors, (12064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:26,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2672 states to 2672 states and 12064 transitions. [2022-11-19 08:36:26,602 INFO L78 Accepts]: Start accepts. Automaton has 2672 states and 12064 transitions. Word has length 8 [2022-11-19 08:36:26,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:26,603 INFO L495 AbstractCegarLoop]: Abstraction has 2672 states and 12064 transitions. [2022-11-19 08:36:26,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:26,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2672 states and 12064 transitions. [2022-11-19 08:36:26,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 08:36:26,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:26,603 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:36:26,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2022-11-19 08:36:26,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:26,804 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:36:26,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:26,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1409912919, now seen corresponding path program 1 times [2022-11-19 08:36:26,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:36:26,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [854738019] [2022-11-19 08:36:26,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:26,805 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:26,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:36:26,806 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:36:26,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-19 08:36:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:26,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:36:26,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:27,175 INFO L321 Elim1Store]: treesize reduction 154, result has 27.7 percent of original size [2022-11-19 08:36:27,176 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 4 case distinctions, treesize of input 18 treesize of output 66 [2022-11-19 08:36:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:27,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:36:27,214 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:36:27,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [854738019] [2022-11-19 08:36:27,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [854738019] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:27,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:36:27,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:36:27,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506186821] [2022-11-19 08:36:27,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:27,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:36:27,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:36:27,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:36:27,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:36:27,216 INFO L87 Difference]: Start difference. First operand 2672 states and 12064 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:27,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:27,446 INFO L93 Difference]: Finished difference Result 2557 states and 11569 transitions. [2022-11-19 08:36:27,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:36:27,447 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 08:36:27,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:27,457 INFO L225 Difference]: With dead ends: 2557 [2022-11-19 08:36:27,457 INFO L226 Difference]: Without dead ends: 2557 [2022-11-19 08:36:27,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:36:27,458 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:27,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:36:27,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2022-11-19 08:36:27,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 2557. [2022-11-19 08:36:27,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2557 states, 2483 states have (on average 4.6592831252517115) internal successors, (11569), 2556 states have internal predecessors, (11569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:27,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2557 states to 2557 states and 11569 transitions. [2022-11-19 08:36:27,515 INFO L78 Accepts]: Start accepts. Automaton has 2557 states and 11569 transitions. Word has length 8 [2022-11-19 08:36:27,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:27,515 INFO L495 AbstractCegarLoop]: Abstraction has 2557 states and 11569 transitions. [2022-11-19 08:36:27,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:27,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2557 states and 11569 transitions. [2022-11-19 08:36:27,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 08:36:27,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:27,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:36:27,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:27,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:27,719 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:36:27,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:27,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1409924116, now seen corresponding path program 1 times [2022-11-19 08:36:27,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:36:27,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132348100] [2022-11-19 08:36:27,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:27,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:27,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:36:27,722 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:36:27,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-19 08:36:27,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:27,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:36:27,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:27,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:27,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:28,142 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:36:28,143 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 18 treesize of output 53 [2022-11-19 08:36:28,165 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 510 treesize of output 494 [2022-11-19 08:36:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:28,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:36:28,329 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:36:28,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132348100] [2022-11-19 08:36:28,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132348100] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:28,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:36:28,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:36:28,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153549291] [2022-11-19 08:36:28,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:28,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:36:28,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:36:28,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:36:28,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:36:28,330 INFO L87 Difference]: Start difference. First operand 2557 states and 11569 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:28,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:28,512 INFO L93 Difference]: Finished difference Result 2558 states and 11570 transitions. [2022-11-19 08:36:28,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:36:28,513 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 08:36:28,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:28,522 INFO L225 Difference]: With dead ends: 2558 [2022-11-19 08:36:28,522 INFO L226 Difference]: Without dead ends: 2558 [2022-11-19 08:36:28,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:36:28,523 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:28,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-11-19 08:36:28,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2558 states. [2022-11-19 08:36:28,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2558 to 2558. [2022-11-19 08:36:28,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2558 states, 2484 states have (on average 4.65780998389694) internal successors, (11570), 2557 states have internal predecessors, (11570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:28,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2558 states to 2558 states and 11570 transitions. [2022-11-19 08:36:28,587 INFO L78 Accepts]: Start accepts. Automaton has 2558 states and 11570 transitions. Word has length 8 [2022-11-19 08:36:28,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:28,587 INFO L495 AbstractCegarLoop]: Abstraction has 2558 states and 11570 transitions. [2022-11-19 08:36:28,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:28,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2558 states and 11570 transitions. [2022-11-19 08:36:28,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 08:36:28,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:28,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:36:28,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-19 08:36:28,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:28,791 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:36:28,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:28,791 INFO L85 PathProgramCache]: Analyzing trace with hash 487653111, now seen corresponding path program 1 times [2022-11-19 08:36:28,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:36:28,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473683819] [2022-11-19 08:36:28,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:28,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:28,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:36:28,793 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:36:28,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-19 08:36:29,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:29,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:36:29,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:29,247 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:36:29,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:36:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:29,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:29,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:29,585 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:36:29,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473683819] [2022-11-19 08:36:29,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473683819] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:29,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2104547682] [2022-11-19 08:36:29,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:29,586 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:36:29,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:36:29,587 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:36:29,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-19 08:36:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:29,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:36:29,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:30,183 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:36:30,183 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:36:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:30,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:30,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2104547682] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:30,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318155322] [2022-11-19 08:36:30,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:30,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:30,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:30,760 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:30,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-19 08:36:30,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:30,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:36:30,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:31,170 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:36:31,171 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:36:31,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:31,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:31,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:31,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318155322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:31,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:36:31,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 14 [2022-11-19 08:36:31,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527237950] [2022-11-19 08:36:31,491 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:36:31,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 08:36:31,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:36:31,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 08:36:31,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:36:31,492 INFO L87 Difference]: Start difference. First operand 2558 states and 11570 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:33,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:33,402 INFO L93 Difference]: Finished difference Result 2794 states and 12256 transitions. [2022-11-19 08:36:33,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:36:33,403 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 08:36:33,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:33,413 INFO L225 Difference]: With dead ends: 2794 [2022-11-19 08:36:33,413 INFO L226 Difference]: Without dead ends: 2794 [2022-11-19 08:36:33,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2022-11-19 08:36:33,414 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 70 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:33,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 0 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 325 Invalid, 0 Unknown, 81 Unchecked, 1.6s Time] [2022-11-19 08:36:33,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2794 states. [2022-11-19 08:36:33,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2794 to 2560. [2022-11-19 08:36:33,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2560 states, 2486 states have (on average 4.656878519710378) internal successors, (11577), 2559 states have internal predecessors, (11577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:33,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2560 states to 2560 states and 11577 transitions. [2022-11-19 08:36:33,476 INFO L78 Accepts]: Start accepts. Automaton has 2560 states and 11577 transitions. Word has length 8 [2022-11-19 08:36:33,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:33,476 INFO L495 AbstractCegarLoop]: Abstraction has 2560 states and 11577 transitions. [2022-11-19 08:36:33,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:33,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2560 states and 11577 transitions. [2022-11-19 08:36:33,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 08:36:33,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:33,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:36:33,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-11-19 08:36:33,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:33,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2022-11-19 08:36:34,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:36:34,078 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:36:34,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:34,079 INFO L85 PathProgramCache]: Analyzing trace with hash 487652220, now seen corresponding path program 1 times [2022-11-19 08:36:34,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:36:34,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394733522] [2022-11-19 08:36:34,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:34,080 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 [2022-11-19 08:36:34,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:36:34,081 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:36:34,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-19 08:36:34,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:34,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:36:34,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:34,531 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:36:34,532 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:36:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:34,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:35,273 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:36:35,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394733522] [2022-11-19 08:36:35,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394733522] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:35,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1842058632] [2022-11-19 08:36:35,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:35,273 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:36:35,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:36:35,274 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:36:35,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-19 08:36:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:35,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:36:35,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:35,819 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:36:35,822 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:36:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:36,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:36,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1842058632] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:36,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867521011] [2022-11-19 08:36:36,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:36,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:36,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:36,497 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:36,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-19 08:36:36,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:36,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:36:36,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:36,920 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:36:36,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:36:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:37,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:37,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867521011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:37,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:36:37,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 17 [2022-11-19 08:36:37,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644310056] [2022-11-19 08:36:37,393 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:36:37,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 08:36:37,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:36:37,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 08:36:37,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-11-19 08:36:37,395 INFO L87 Difference]: Start difference. First operand 2560 states and 11577 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:40,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:40,826 INFO L93 Difference]: Finished difference Result 4954 states and 22293 transitions. [2022-11-19 08:36:40,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:36:40,828 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 08:36:40,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:40,849 INFO L225 Difference]: With dead ends: 4954 [2022-11-19 08:36:40,849 INFO L226 Difference]: Without dead ends: 4954 [2022-11-19 08:36:40,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2022-11-19 08:36:40,850 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 266 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:40,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 0 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 625 Invalid, 0 Unknown, 66 Unchecked, 3.1s Time] [2022-11-19 08:36:40,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4954 states. [2022-11-19 08:36:40,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4954 to 2560. [2022-11-19 08:36:40,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2560 states, 2486 states have (on average 4.656074014481094) internal successors, (11575), 2559 states have internal predecessors, (11575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:40,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2560 states to 2560 states and 11575 transitions. [2022-11-19 08:36:40,928 INFO L78 Accepts]: Start accepts. Automaton has 2560 states and 11575 transitions. Word has length 8 [2022-11-19 08:36:40,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:40,928 INFO L495 AbstractCegarLoop]: Abstraction has 2560 states and 11575 transitions. [2022-11-19 08:36:40,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:40,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2560 states and 11575 transitions. [2022-11-19 08:36:40,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 08:36:40,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:40,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:36:40,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:41,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Ended with exit code 0 [2022-11-19 08:36:41,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-11-19 08:36:41,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:41,530 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:36:41,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:41,530 INFO L85 PathProgramCache]: Analyzing trace with hash 487654847, now seen corresponding path program 1 times [2022-11-19 08:36:41,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:36:41,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943112315] [2022-11-19 08:36:41,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:41,531 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:41,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:36:41,532 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:36:41,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-19 08:36:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:41,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:36:41,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:41,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:41,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:41,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:41,982 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-19 08:36:41,982 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 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-19 08:36:42,004 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 18 treesize of output 16 [2022-11-19 08:36:42,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:42,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:42,558 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:36:42,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943112315] [2022-11-19 08:36:42,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943112315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:42,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [941142558] [2022-11-19 08:36:42,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:42,563 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:36:42,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:36:42,564 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:36:42,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-19 08:36:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:42,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:36:42,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:42,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:42,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:43,140 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:36:43,141 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 18 treesize of output 53 [2022-11-19 08:36:43,171 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 358 treesize of output 342 [2022-11-19 08:36:43,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:36:43,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:36:43,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [941142558] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:43,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:36:43,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-19 08:36:43,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801975887] [2022-11-19 08:36:43,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:43,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:36:43,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:36:43,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:36:43,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:36:43,321 INFO L87 Difference]: Start difference. First operand 2560 states and 11575 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:43,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:43,474 INFO L93 Difference]: Finished difference Result 2559 states and 11572 transitions. [2022-11-19 08:36:43,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:36:43,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 08:36:43,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:43,483 INFO L225 Difference]: With dead ends: 2559 [2022-11-19 08:36:43,483 INFO L226 Difference]: Without dead ends: 2559 [2022-11-19 08:36:43,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:36:43,483 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:43,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-19 08:36:43,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2559 states. [2022-11-19 08:36:43,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2559 to 2559. [2022-11-19 08:36:43,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2559 states, 2485 states have (on average 4.656740442655936) internal successors, (11572), 2558 states have internal predecessors, (11572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:43,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2559 states to 2559 states and 11572 transitions. [2022-11-19 08:36:43,580 INFO L78 Accepts]: Start accepts. Automaton has 2559 states and 11572 transitions. Word has length 8 [2022-11-19 08:36:43,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:43,580 INFO L495 AbstractCegarLoop]: Abstraction has 2559 states and 11572 transitions. [2022-11-19 08:36:43,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:43,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2559 states and 11572 transitions. [2022-11-19 08:36:43,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 08:36:43,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:43,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:36:43,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-19 08:36:43,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:43,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:36:43,991 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:36:43,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:43,992 INFO L85 PathProgramCache]: Analyzing trace with hash 487654878, now seen corresponding path program 1 times [2022-11-19 08:36:43,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:36:43,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198677256] [2022-11-19 08:36:43,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:43,993 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:43,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:36:43,994 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:36:43,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-19 08:36:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:44,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:36:44,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:44,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:44,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:44,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:44,414 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-19 08:36:44,415 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 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-19 08:36:44,433 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 18 treesize of output 16 [2022-11-19 08:36:44,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:44,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:44,963 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:36:44,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198677256] [2022-11-19 08:36:44,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198677256] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:44,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1410363165] [2022-11-19 08:36:44,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:44,964 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:36:44,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:36:44,965 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:36:44,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-19 08:36:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:45,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:36:45,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:45,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:45,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:36:45,546 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:36:45,546 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 18 treesize of output 53 [2022-11-19 08:36:45,574 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 [2022-11-19 08:36:45,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:36:45,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:36:45,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1410363165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:36:45,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:36:45,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-19 08:36:45,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793693174] [2022-11-19 08:36:45,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:36:45,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:36:45,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:36:45,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:36:45,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:36:45,724 INFO L87 Difference]: Start difference. First operand 2559 states and 11572 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:45,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:45,871 INFO L93 Difference]: Finished difference Result 2558 states and 11569 transitions. [2022-11-19 08:36:45,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:36:45,871 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 08:36:45,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:45,880 INFO L225 Difference]: With dead ends: 2558 [2022-11-19 08:36:45,880 INFO L226 Difference]: Without dead ends: 2558 [2022-11-19 08:36:45,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:36:45,881 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:45,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-11-19 08:36:45,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2558 states. [2022-11-19 08:36:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2558 to 2558. [2022-11-19 08:36:45,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2558 states, 2484 states have (on average 4.657407407407407) internal successors, (11569), 2557 states have internal predecessors, (11569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:45,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2558 states to 2558 states and 11569 transitions. [2022-11-19 08:36:45,933 INFO L78 Accepts]: Start accepts. Automaton has 2558 states and 11569 transitions. Word has length 8 [2022-11-19 08:36:45,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:45,933 INFO L495 AbstractCegarLoop]: Abstraction has 2558 states and 11569 transitions. [2022-11-19 08:36:45,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:45,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2558 states and 11569 transitions. [2022-11-19 08:36:45,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 08:36:45,934 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:45,934 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-19 08:36:45,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Ended with exit code 0 [2022-11-19 08:36:46,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (52)] Ended with exit code 0 [2022-11-19 08:36:46,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:36:46,334 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:36:46,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:46,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1066165765, now seen corresponding path program 1 times [2022-11-19 08:36:46,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:36:46,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706671838] [2022-11-19 08:36:46,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:46,335 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:46,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:36:46,337 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:36:46,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-19 08:36:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:46,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 08:36:46,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:46,764 INFO L321 Elim1Store]: treesize reduction 146, result has 27.4 percent of original size [2022-11-19 08:36:46,764 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 4 case distinctions, treesize of input 22 treesize of output 64 [2022-11-19 08:36:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:36:46,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:36:47,519 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:36:47,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706671838] [2022-11-19 08:36:47,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706671838] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:47,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1152969436] [2022-11-19 08:36:47,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:47,520 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:36:47,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:36:47,523 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:36:47,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (54)] Waiting until timeout for monitored process [2022-11-19 08:36:47,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:47,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:36:47,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:48,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:48,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1152969436] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:48,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165849967] [2022-11-19 08:36:48,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:48,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:36:48,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:36:48,599 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:36:48,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-19 08:36:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:48,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:36:48,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:49,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:36:49,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:36:49,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165849967] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:36:49,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:36:49,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5, 5, 5, 5] total 19 [2022-11-19 08:36:49,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062007745] [2022-11-19 08:36:49,167 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:36:49,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 08:36:49,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:36:49,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 08:36:49,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-11-19 08:36:49,170 INFO L87 Difference]: Start difference. First operand 2558 states and 11569 transitions. Second operand has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:58,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:36:58,732 INFO L93 Difference]: Finished difference Result 8505 states and 35996 transitions. [2022-11-19 08:36:58,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 08:36:58,733 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 08:36:58,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:36:58,776 INFO L225 Difference]: With dead ends: 8505 [2022-11-19 08:36:58,776 INFO L226 Difference]: Without dead ends: 8501 [2022-11-19 08:36:58,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=293, Invalid=1039, Unknown=0, NotChecked=0, Total=1332 [2022-11-19 08:36:58,777 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1541 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1541 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:36:58,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1541 Valid, 0 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-11-19 08:36:58,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8501 states. [2022-11-19 08:36:58,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8501 to 6021. [2022-11-19 08:36:58,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6021 states, 5947 states have (on average 4.726584832688751) internal successors, (28109), 6020 states have internal predecessors, (28109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:59,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6021 states to 6021 states and 28109 transitions. [2022-11-19 08:36:59,044 INFO L78 Accepts]: Start accepts. Automaton has 6021 states and 28109 transitions. Word has length 8 [2022-11-19 08:36:59,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:36:59,045 INFO L495 AbstractCegarLoop]: Abstraction has 6021 states and 28109 transitions. [2022-11-19 08:36:59,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:36:59,045 INFO L276 IsEmpty]: Start isEmpty. Operand 6021 states and 28109 transitions. [2022-11-19 08:36:59,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 08:36:59,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:36:59,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:36:59,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Ended with exit code 0 [2022-11-19 08:36:59,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:59,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (54)] Forceful destruction successful, exit code 0 [2022-11-19 08:36:59,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:36:59,655 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:36:59,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:36:59,656 INFO L85 PathProgramCache]: Analyzing trace with hash -2062567674, now seen corresponding path program 1 times [2022-11-19 08:36:59,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:36:59,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [524943276] [2022-11-19 08:36:59,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:36:59,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:36:59,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:36:59,657 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:36:59,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-19 08:36:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:36:59,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:36:59,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:36:59,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:00,071 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-19 08:37:00,071 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-19 08:37:00,097 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 [2022-11-19 08:37:00,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:00,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:37:00,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:00,656 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:37:00,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [524943276] [2022-11-19 08:37:00,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [524943276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:37:00,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1982438771] [2022-11-19 08:37:00,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:00,657 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:37:00,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:37:00,659 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:37:00,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-19 08:37:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:01,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:37:01,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:01,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:01,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:01,302 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:37:01,303 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 18 treesize of output 53 [2022-11-19 08:37:01,335 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 147 treesize of output 143 [2022-11-19 08:37:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:37:01,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:37:01,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1982438771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:01,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:37:01,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3, 3] total 7 [2022-11-19 08:37:01,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356490852] [2022-11-19 08:37:01,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:01,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:37:01,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:37:01,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:37:01,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:37:01,505 INFO L87 Difference]: Start difference. First operand 6021 states and 28109 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:01,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:01,688 INFO L93 Difference]: Finished difference Result 6022 states and 28109 transitions. [2022-11-19 08:37:01,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:37:01,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 08:37:01,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:01,718 INFO L225 Difference]: With dead ends: 6022 [2022-11-19 08:37:01,718 INFO L226 Difference]: Without dead ends: 6022 [2022-11-19 08:37:01,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:37:01,719 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:01,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-11-19 08:37:01,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6022 states. [2022-11-19 08:37:01,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6022 to 6013. [2022-11-19 08:37:01,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6013 states, 5939 states have (on average 4.730425997642701) internal successors, (28094), 6012 states have internal predecessors, (28094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:01,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6013 states to 6013 states and 28094 transitions. [2022-11-19 08:37:01,911 INFO L78 Accepts]: Start accepts. Automaton has 6013 states and 28094 transitions. Word has length 9 [2022-11-19 08:37:01,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:01,912 INFO L495 AbstractCegarLoop]: Abstraction has 6013 states and 28094 transitions. [2022-11-19 08:37:01,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:01,912 INFO L276 IsEmpty]: Start isEmpty. Operand 6013 states and 28094 transitions. [2022-11-19 08:37:01,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 08:37:01,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:01,913 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:01,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2022-11-19 08:37:02,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Ended with exit code 0 [2022-11-19 08:37:02,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:02,319 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:37:02,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:02,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1308603295, now seen corresponding path program 1 times [2022-11-19 08:37:02,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:37:02,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316589702] [2022-11-19 08:37:02,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:02,320 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:02,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:37:02,321 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:37:02,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-19 08:37:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:02,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:37:02,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:02,671 INFO L321 Elim1Store]: treesize reduction 190, result has 14.8 percent of original size [2022-11-19 08:37:02,672 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 7 case distinctions, treesize of input 49 treesize of output 66 [2022-11-19 08:37:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:37:02,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:37:02,857 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:37:02,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316589702] [2022-11-19 08:37:02,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316589702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:02,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:37:02,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:37:02,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111522425] [2022-11-19 08:37:02,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:02,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:37:02,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:37:02,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:37:02,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:37:02,858 INFO L87 Difference]: Start difference. First operand 6013 states and 28094 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:03,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:03,041 INFO L93 Difference]: Finished difference Result 6012 states and 28089 transitions. [2022-11-19 08:37:03,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:37:03,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 08:37:03,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:03,079 INFO L225 Difference]: With dead ends: 6012 [2022-11-19 08:37:03,080 INFO L226 Difference]: Without dead ends: 6012 [2022-11-19 08:37:03,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:37:03,080 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:03,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-19 08:37:03,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6012 states. [2022-11-19 08:37:03,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6012 to 6012. [2022-11-19 08:37:03,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6012 states, 5939 states have (on average 4.729584105068193) internal successors, (28089), 6011 states have internal predecessors, (28089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:03,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6012 states to 6012 states and 28089 transitions. [2022-11-19 08:37:03,296 INFO L78 Accepts]: Start accepts. Automaton has 6012 states and 28089 transitions. Word has length 9 [2022-11-19 08:37:03,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:03,297 INFO L495 AbstractCegarLoop]: Abstraction has 6012 states and 28089 transitions. [2022-11-19 08:37:03,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:03,297 INFO L276 IsEmpty]: Start isEmpty. Operand 6012 states and 28089 transitions. [2022-11-19 08:37:03,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 08:37:03,298 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:03,298 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:03,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-19 08:37:03,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:03,512 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:37:03,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:03,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1308797880, now seen corresponding path program 1 times [2022-11-19 08:37:03,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:37:03,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [970481877] [2022-11-19 08:37:03,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:03,513 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 [2022-11-19 08:37:03,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:37:03,514 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:37:03,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-19 08:37:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:03,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:37:03,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:03,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:04,010 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-19 08:37:04,011 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-19 08:37:04,040 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 120 treesize of output 116 [2022-11-19 08:37:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:04,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:37:05,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:05,073 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:37:05,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [970481877] [2022-11-19 08:37:05,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [970481877] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:37:05,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1602553104] [2022-11-19 08:37:05,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:05,074 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:37:05,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:37:05,075 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:37:05,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-19 08:37:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:05,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:37:05,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:05,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:05,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:05,718 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:37:05,718 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 18 treesize of output 53 [2022-11-19 08:37:05,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 126 [2022-11-19 08:37:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:37:05,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:37:05,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1602553104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:05,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:37:05,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-19 08:37:05,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237604094] [2022-11-19 08:37:05,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:05,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:37:05,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:37:05,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:37:05,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:37:05,929 INFO L87 Difference]: Start difference. First operand 6012 states and 28089 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:06,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:06,085 INFO L93 Difference]: Finished difference Result 6010 states and 28082 transitions. [2022-11-19 08:37:06,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:37:06,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 08:37:06,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:06,106 INFO L225 Difference]: With dead ends: 6010 [2022-11-19 08:37:06,106 INFO L226 Difference]: Without dead ends: 6010 [2022-11-19 08:37:06,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:37:06,107 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:06,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-19 08:37:06,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6010 states. [2022-11-19 08:37:06,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6010 to 6010. [2022-11-19 08:37:06,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6010 states, 5937 states have (on average 4.7299983156476335) internal successors, (28082), 6009 states have internal predecessors, (28082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:06,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6010 states to 6010 states and 28082 transitions. [2022-11-19 08:37:06,232 INFO L78 Accepts]: Start accepts. Automaton has 6010 states and 28082 transitions. Word has length 9 [2022-11-19 08:37:06,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:06,233 INFO L495 AbstractCegarLoop]: Abstraction has 6010 states and 28082 transitions. [2022-11-19 08:37:06,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:06,233 INFO L276 IsEmpty]: Start isEmpty. Operand 6010 states and 28082 transitions. [2022-11-19 08:37:06,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 08:37:06,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:06,234 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:06,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-19 08:37:06,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (60)] Forceful destruction successful, exit code 0 [2022-11-19 08:37:06,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:37:06,636 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:37:06,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:06,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1310128617, now seen corresponding path program 2 times [2022-11-19 08:37:06,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:37:06,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1556891831] [2022-11-19 08:37:06,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:37:06,637 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:06,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:37:06,637 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:37:06,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-19 08:37:06,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 08:37:06,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:37:06,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:37:06,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:06,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:07,040 INFO L321 Elim1Store]: treesize reduction 117, result has 30.8 percent of original size [2022-11-19 08:37:07,040 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 4 case distinctions, treesize of input 18 treesize of output 57 [2022-11-19 08:37:07,057 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 88 treesize of output 84 [2022-11-19 08:37:07,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:37:07,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:37:07,277 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:37:07,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1556891831] [2022-11-19 08:37:07,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1556891831] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:07,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:37:07,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:37:07,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666748779] [2022-11-19 08:37:07,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:07,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:37:07,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:37:07,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:37:07,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:37:07,279 INFO L87 Difference]: Start difference. First operand 6010 states and 28082 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:07,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:07,906 INFO L93 Difference]: Finished difference Result 11291 states and 52042 transitions. [2022-11-19 08:37:07,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:37:07,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 08:37:07,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:07,955 INFO L225 Difference]: With dead ends: 11291 [2022-11-19 08:37:07,955 INFO L226 Difference]: Without dead ends: 11291 [2022-11-19 08:37:07,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:37:07,956 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 99 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:07,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 0 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 115 Unchecked, 0.5s Time] [2022-11-19 08:37:07,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11291 states. [2022-11-19 08:37:08,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11291 to 6010. [2022-11-19 08:37:08,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6010 states, 5937 states have (on average 4.729493009937679) internal successors, (28079), 6009 states have internal predecessors, (28079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:08,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6010 states to 6010 states and 28079 transitions. [2022-11-19 08:37:08,168 INFO L78 Accepts]: Start accepts. Automaton has 6010 states and 28079 transitions. Word has length 9 [2022-11-19 08:37:08,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:08,168 INFO L495 AbstractCegarLoop]: Abstraction has 6010 states and 28079 transitions. [2022-11-19 08:37:08,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:08,168 INFO L276 IsEmpty]: Start isEmpty. Operand 6010 states and 28079 transitions. [2022-11-19 08:37:08,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 08:37:08,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:08,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:08,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-11-19 08:37:08,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:08,369 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:37:08,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:08,369 INFO L85 PathProgramCache]: Analyzing trace with hash 2011644944, now seen corresponding path program 1 times [2022-11-19 08:37:08,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:37:08,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [710841498] [2022-11-19 08:37:08,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:08,370 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:08,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:37:08,371 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:37:08,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-19 08:37:08,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:08,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:37:08,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:08,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:37:08,603 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:37:08,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [710841498] [2022-11-19 08:37:08,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [710841498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:08,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:37:08,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:37:08,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065552213] [2022-11-19 08:37:08,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:08,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:37:08,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:37:08,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:37:08,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:37:08,605 INFO L87 Difference]: Start difference. First operand 6010 states and 28079 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:08,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:08,813 INFO L93 Difference]: Finished difference Result 5022 states and 22909 transitions. [2022-11-19 08:37:08,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:37:08,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 08:37:08,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:08,830 INFO L225 Difference]: With dead ends: 5022 [2022-11-19 08:37:08,830 INFO L226 Difference]: Without dead ends: 5022 [2022-11-19 08:37:08,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:37:08,831 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:08,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 0 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:37:08,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5022 states. [2022-11-19 08:37:08,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5022 to 5022. [2022-11-19 08:37:08,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5022 states, 4965 states have (on average 4.614098690835851) internal successors, (22909), 5021 states have internal predecessors, (22909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:08,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5022 states to 5022 states and 22909 transitions. [2022-11-19 08:37:08,948 INFO L78 Accepts]: Start accepts. Automaton has 5022 states and 22909 transitions. Word has length 10 [2022-11-19 08:37:08,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:08,949 INFO L495 AbstractCegarLoop]: Abstraction has 5022 states and 22909 transitions. [2022-11-19 08:37:08,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:08,949 INFO L276 IsEmpty]: Start isEmpty. Operand 5022 states and 22909 transitions. [2022-11-19 08:37:08,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 08:37:08,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:08,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:08,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-19 08:37:09,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:09,152 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:37:09,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:09,153 INFO L85 PathProgramCache]: Analyzing trace with hash 2011644945, now seen corresponding path program 1 times [2022-11-19 08:37:09,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:37:09,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [94766088] [2022-11-19 08:37:09,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:09,153 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:09,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:37:09,154 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:37:09,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-19 08:37:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:09,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:37:09,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:09,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:37:09,413 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:37:09,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [94766088] [2022-11-19 08:37:09,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [94766088] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:09,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:37:09,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:37:09,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848242098] [2022-11-19 08:37:09,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:09,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:37:09,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:37:09,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:37:09,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:37:09,415 INFO L87 Difference]: Start difference. First operand 5022 states and 22909 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:09,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:09,631 INFO L93 Difference]: Finished difference Result 4034 states and 17739 transitions. [2022-11-19 08:37:09,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:37:09,632 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 08:37:09,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:09,644 INFO L225 Difference]: With dead ends: 4034 [2022-11-19 08:37:09,644 INFO L226 Difference]: Without dead ends: 4034 [2022-11-19 08:37:09,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:37:09,645 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:09,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 0 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:37:09,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4034 states. [2022-11-19 08:37:09,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4034 to 4034. [2022-11-19 08:37:09,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4034 states, 3993 states have (on average 4.442524417731029) internal successors, (17739), 4033 states have internal predecessors, (17739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:09,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4034 states to 4034 states and 17739 transitions. [2022-11-19 08:37:09,776 INFO L78 Accepts]: Start accepts. Automaton has 4034 states and 17739 transitions. Word has length 10 [2022-11-19 08:37:09,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:09,777 INFO L495 AbstractCegarLoop]: Abstraction has 4034 states and 17739 transitions. [2022-11-19 08:37:09,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:09,777 INFO L276 IsEmpty]: Start isEmpty. Operand 4034 states and 17739 transitions. [2022-11-19 08:37:09,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 08:37:09,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:09,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:09,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-19 08:37:09,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:09,978 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:37:09,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:09,979 INFO L85 PathProgramCache]: Analyzing trace with hash 2011598213, now seen corresponding path program 1 times [2022-11-19 08:37:09,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:37:09,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [792846910] [2022-11-19 08:37:09,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:09,979 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 [2022-11-19 08:37:09,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:37:09,980 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:37:10,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-19 08:37:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:10,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:37:10,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:10,417 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:37:10,417 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:37:10,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:10,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:37:10,583 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:37:10,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [792846910] [2022-11-19 08:37:10,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [792846910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:10,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:37:10,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:37:10,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683302730] [2022-11-19 08:37:10,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:10,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:37:10,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:37:10,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:37:10,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:37:10,585 INFO L87 Difference]: Start difference. First operand 4034 states and 17739 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:10,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:10,864 INFO L93 Difference]: Finished difference Result 4040 states and 17754 transitions. [2022-11-19 08:37:10,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:37:10,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 08:37:10,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:10,876 INFO L225 Difference]: With dead ends: 4040 [2022-11-19 08:37:10,876 INFO L226 Difference]: Without dead ends: 4040 [2022-11-19 08:37:10,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:37:10,877 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:10,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-11-19 08:37:10,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4040 states. [2022-11-19 08:37:10,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4040 to 4040. [2022-11-19 08:37:10,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4040 states, 3999 states have (on average 4.439609902475619) internal successors, (17754), 4039 states have internal predecessors, (17754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:10,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4040 states to 4040 states and 17754 transitions. [2022-11-19 08:37:10,958 INFO L78 Accepts]: Start accepts. Automaton has 4040 states and 17754 transitions. Word has length 10 [2022-11-19 08:37:10,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:10,958 INFO L495 AbstractCegarLoop]: Abstraction has 4040 states and 17754 transitions. [2022-11-19 08:37:10,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:10,958 INFO L276 IsEmpty]: Start isEmpty. Operand 4040 states and 17754 transitions. [2022-11-19 08:37:10,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 08:37:10,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:10,959 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:10,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-19 08:37:11,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:11,162 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:37:11,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:11,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1911960596, now seen corresponding path program 1 times [2022-11-19 08:37:11,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:37:11,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018609541] [2022-11-19 08:37:11,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:11,163 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:11,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:37:11,164 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:37:11,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-19 08:37:11,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:11,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:37:11,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:11,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:11,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:11,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:11,625 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-19 08:37:11,626 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 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-19 08:37:11,652 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 18 treesize of output 16 [2022-11-19 08:37:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:12,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:37:12,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:12,805 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:37:12,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018609541] [2022-11-19 08:37:12,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018609541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:37:12,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1941159978] [2022-11-19 08:37:12,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:12,805 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:37:12,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:37:12,806 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:37:12,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-11-19 08:37:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:13,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:37:13,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:13,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:13,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:13,514 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:37:13,514 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 18 treesize of output 53 [2022-11-19 08:37:13,536 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 271 treesize of output 265 [2022-11-19 08:37:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:37:13,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:37:13,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1941159978] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:13,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:37:13,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-19 08:37:13,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431871767] [2022-11-19 08:37:13,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:13,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:37:13,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:37:13,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:37:13,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:37:13,734 INFO L87 Difference]: Start difference. First operand 4040 states and 17754 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:13,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:13,871 INFO L93 Difference]: Finished difference Result 4048 states and 17792 transitions. [2022-11-19 08:37:13,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:37:13,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 10 [2022-11-19 08:37:13,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:13,886 INFO L225 Difference]: With dead ends: 4048 [2022-11-19 08:37:13,886 INFO L226 Difference]: Without dead ends: 4048 [2022-11-19 08:37:13,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:37:13,886 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:13,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-11-19 08:37:13,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4048 states. [2022-11-19 08:37:13,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4048 to 4048. [2022-11-19 08:37:13,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4048 states, 4007 states have (on average 4.440229598203144) internal successors, (17792), 4047 states have internal predecessors, (17792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:13,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4048 states to 4048 states and 17792 transitions. [2022-11-19 08:37:13,972 INFO L78 Accepts]: Start accepts. Automaton has 4048 states and 17792 transitions. Word has length 10 [2022-11-19 08:37:13,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:13,973 INFO L495 AbstractCegarLoop]: Abstraction has 4048 states and 17792 transitions. [2022-11-19 08:37:13,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:13,973 INFO L276 IsEmpty]: Start isEmpty. Operand 4048 states and 17792 transitions. [2022-11-19 08:37:13,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 08:37:13,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:13,973 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:13,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-19 08:37:14,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (66)] Ended with exit code 0 [2022-11-19 08:37:14,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:37:14,374 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:37:14,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:14,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1918029869, now seen corresponding path program 1 times [2022-11-19 08:37:14,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:37:14,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806365671] [2022-11-19 08:37:14,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:14,375 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:14,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:37:14,376 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:37:14,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-19 08:37:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:14,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:37:14,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:14,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:14,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:14,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:14,850 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-19 08:37:14,851 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 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-19 08:37:14,888 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 18 treesize of output 16 [2022-11-19 08:37:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:15,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:37:15,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:15,948 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:37:15,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [806365671] [2022-11-19 08:37:15,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [806365671] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:37:15,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1770192159] [2022-11-19 08:37:15,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:15,948 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:37:15,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:37:15,951 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:37:15,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-11-19 08:37:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:16,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:37:16,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:16,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:16,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:16,664 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:37:16,664 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 18 treesize of output 53 [2022-11-19 08:37:16,693 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 250 treesize of output 242 [2022-11-19 08:37:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:37:16,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:37:16,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1770192159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:16,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:37:16,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-19 08:37:16,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070552690] [2022-11-19 08:37:16,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:16,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:37:16,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:37:16,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:37:16,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:37:16,875 INFO L87 Difference]: Start difference. First operand 4048 states and 17792 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:17,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:17,047 INFO L93 Difference]: Finished difference Result 4046 states and 17788 transitions. [2022-11-19 08:37:17,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:37:17,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 10 [2022-11-19 08:37:17,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:17,059 INFO L225 Difference]: With dead ends: 4046 [2022-11-19 08:37:17,059 INFO L226 Difference]: Without dead ends: 4046 [2022-11-19 08:37:17,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:37:17,060 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:17,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-11-19 08:37:17,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4046 states. [2022-11-19 08:37:17,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4046 to 4046. [2022-11-19 08:37:17,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4046 states, 4005 states have (on average 4.441448189762797) internal successors, (17788), 4045 states have internal predecessors, (17788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:17,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4046 states to 4046 states and 17788 transitions. [2022-11-19 08:37:17,135 INFO L78 Accepts]: Start accepts. Automaton has 4046 states and 17788 transitions. Word has length 10 [2022-11-19 08:37:17,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:17,136 INFO L495 AbstractCegarLoop]: Abstraction has 4046 states and 17788 transitions. [2022-11-19 08:37:17,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:17,136 INFO L276 IsEmpty]: Start isEmpty. Operand 4046 states and 17788 transitions. [2022-11-19 08:37:17,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 08:37:17,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:17,136 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:17,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-11-19 08:37:17,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (68)] Ended with exit code 0 [2022-11-19 08:37:17,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:37:17,537 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:37:17,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:17,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1959275524, now seen corresponding path program 1 times [2022-11-19 08:37:17,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:37:17,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [420593245] [2022-11-19 08:37:17,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:17,539 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:17,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:37:17,540 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:37:17,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-19 08:37:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:17,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:37:17,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:17,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:17,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:17,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:18,026 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-19 08:37:18,026 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 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-19 08:37:18,051 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 18 treesize of output 16 [2022-11-19 08:37:18,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:18,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:37:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:19,026 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:37:19,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [420593245] [2022-11-19 08:37:19,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [420593245] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:37:19,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1561358994] [2022-11-19 08:37:19,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:19,026 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:37:19,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:37:19,028 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:37:19,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-19 08:37:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:19,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:37:19,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:19,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:19,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:19,691 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:37:19,691 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 18 treesize of output 53 [2022-11-19 08:37:19,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 84 [2022-11-19 08:37:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:37:19,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:37:19,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1561358994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:19,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:37:19,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-19 08:37:19,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511092894] [2022-11-19 08:37:19,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:19,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:37:19,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:37:19,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:37:19,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:37:19,880 INFO L87 Difference]: Start difference. First operand 4046 states and 17788 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:20,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:20,017 INFO L93 Difference]: Finished difference Result 4054 states and 17821 transitions. [2022-11-19 08:37:20,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:37:20,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 10 [2022-11-19 08:37:20,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:20,030 INFO L225 Difference]: With dead ends: 4054 [2022-11-19 08:37:20,030 INFO L226 Difference]: Without dead ends: 4054 [2022-11-19 08:37:20,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:37:20,031 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:20,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-19 08:37:20,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4054 states. [2022-11-19 08:37:20,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4054 to 4053. [2022-11-19 08:37:20,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4053 states, 4012 states have (on average 4.4411764705882355) internal successors, (17818), 4052 states have internal predecessors, (17818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:20,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4053 states to 4053 states and 17818 transitions. [2022-11-19 08:37:20,106 INFO L78 Accepts]: Start accepts. Automaton has 4053 states and 17818 transitions. Word has length 10 [2022-11-19 08:37:20,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:20,107 INFO L495 AbstractCegarLoop]: Abstraction has 4053 states and 17818 transitions. [2022-11-19 08:37:20,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:20,107 INFO L276 IsEmpty]: Start isEmpty. Operand 4053 states and 17818 transitions. [2022-11-19 08:37:20,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 08:37:20,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:20,107 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:20,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-19 08:37:20,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (70)] Ended with exit code 0 [2022-11-19 08:37:20,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:37:20,508 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:37:20,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:20,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1959282685, now seen corresponding path program 1 times [2022-11-19 08:37:20,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:37:20,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1008716939] [2022-11-19 08:37:20,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:20,509 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:20,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:37:20,510 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:37:20,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-19 08:37:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:20,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:37:20,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:20,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:20,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:20,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:20,951 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-19 08:37:20,951 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 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-19 08:37:20,968 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 18 treesize of output 16 [2022-11-19 08:37:21,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:21,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:37:21,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:21,891 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:37:21,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1008716939] [2022-11-19 08:37:21,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1008716939] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:37:21,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1488063816] [2022-11-19 08:37:21,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:21,892 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:37:21,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:37:21,893 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:37:21,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2022-11-19 08:37:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:22,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:37:22,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:22,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:22,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:22,566 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:37:22,566 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 18 treesize of output 53 [2022-11-19 08:37:22,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2022-11-19 08:37:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:37:22,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:37:22,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1488063816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:22,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:37:22,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-19 08:37:22,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348515340] [2022-11-19 08:37:22,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:22,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:37:22,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:37:22,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:37:22,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:37:22,792 INFO L87 Difference]: Start difference. First operand 4053 states and 17818 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:22,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:22,926 INFO L93 Difference]: Finished difference Result 4051 states and 17814 transitions. [2022-11-19 08:37:22,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:37:22,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 10 [2022-11-19 08:37:22,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:22,939 INFO L225 Difference]: With dead ends: 4051 [2022-11-19 08:37:22,939 INFO L226 Difference]: Without dead ends: 4051 [2022-11-19 08:37:22,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:37:22,940 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:22,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-11-19 08:37:22,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2022-11-19 08:37:22,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 4049. [2022-11-19 08:37:23,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4049 states, 4008 states have (on average 4.443612774451098) internal successors, (17810), 4048 states have internal predecessors, (17810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:23,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4049 states to 4049 states and 17810 transitions. [2022-11-19 08:37:23,013 INFO L78 Accepts]: Start accepts. Automaton has 4049 states and 17810 transitions. Word has length 10 [2022-11-19 08:37:23,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:23,014 INFO L495 AbstractCegarLoop]: Abstraction has 4049 states and 17810 transitions. [2022-11-19 08:37:23,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:23,014 INFO L276 IsEmpty]: Start isEmpty. Operand 4049 states and 17810 transitions. [2022-11-19 08:37:23,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:37:23,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:23,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:23,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Ended with exit code 0 [2022-11-19 08:37:23,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (72)] Ended with exit code 0 [2022-11-19 08:37:23,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:37:23,415 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:37:23,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:23,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1879841685, now seen corresponding path program 1 times [2022-11-19 08:37:23,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:37:23,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [798645724] [2022-11-19 08:37:23,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:23,416 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:23,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:37:23,417 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:37:23,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-19 08:37:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:23,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:37:23,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:23,859 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:37:23,860 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:37:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:24,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:37:24,059 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:37:24,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [798645724] [2022-11-19 08:37:24,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [798645724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:24,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:37:24,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:37:24,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412075682] [2022-11-19 08:37:24,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:24,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:37:24,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:37:24,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:37:24,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:37:24,060 INFO L87 Difference]: Start difference. First operand 4049 states and 17810 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:24,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:24,310 INFO L93 Difference]: Finished difference Result 4054 states and 17819 transitions. [2022-11-19 08:37:24,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:37:24,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 08:37:24,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:24,323 INFO L225 Difference]: With dead ends: 4054 [2022-11-19 08:37:24,323 INFO L226 Difference]: Without dead ends: 4054 [2022-11-19 08:37:24,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:37:24,324 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:24,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-11-19 08:37:24,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4054 states. [2022-11-19 08:37:24,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4054 to 4054. [2022-11-19 08:37:24,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4054 states, 4013 states have (on average 4.440318963369051) internal successors, (17819), 4053 states have internal predecessors, (17819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4054 states to 4054 states and 17819 transitions. [2022-11-19 08:37:24,404 INFO L78 Accepts]: Start accepts. Automaton has 4054 states and 17819 transitions. Word has length 11 [2022-11-19 08:37:24,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:24,404 INFO L495 AbstractCegarLoop]: Abstraction has 4054 states and 17819 transitions. [2022-11-19 08:37:24,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:24,404 INFO L276 IsEmpty]: Start isEmpty. Operand 4054 states and 17819 transitions. [2022-11-19 08:37:24,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:37:24,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:24,405 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:24,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Ended with exit code 0 [2022-11-19 08:37:24,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:24,606 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:37:24,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:24,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1878918164, now seen corresponding path program 1 times [2022-11-19 08:37:24,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:37:24,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [353081829] [2022-11-19 08:37:24,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:24,607 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:24,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:37:24,608 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:37:24,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-19 08:37:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:24,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:37:24,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:25,043 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:37:25,043 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:37:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:25,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:37:25,205 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:37:25,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [353081829] [2022-11-19 08:37:25,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [353081829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:25,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:37:25,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:37:25,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672972556] [2022-11-19 08:37:25,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:25,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:37:25,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:37:25,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:37:25,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:37:25,207 INFO L87 Difference]: Start difference. First operand 4054 states and 17819 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:25,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:25,467 INFO L93 Difference]: Finished difference Result 4057 states and 17826 transitions. [2022-11-19 08:37:25,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:37:25,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 08:37:25,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:25,480 INFO L225 Difference]: With dead ends: 4057 [2022-11-19 08:37:25,480 INFO L226 Difference]: Without dead ends: 4057 [2022-11-19 08:37:25,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:37:25,481 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:25,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-11-19 08:37:25,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4057 states. [2022-11-19 08:37:25,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4057 to 4057. [2022-11-19 08:37:25,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4057 states, 4016 states have (on average 4.438745019920319) internal successors, (17826), 4056 states have internal predecessors, (17826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:25,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4057 states to 4057 states and 17826 transitions. [2022-11-19 08:37:25,557 INFO L78 Accepts]: Start accepts. Automaton has 4057 states and 17826 transitions. Word has length 11 [2022-11-19 08:37:25,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:25,558 INFO L495 AbstractCegarLoop]: Abstraction has 4057 states and 17826 transitions. [2022-11-19 08:37:25,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:25,558 INFO L276 IsEmpty]: Start isEmpty. Operand 4057 states and 17826 transitions. [2022-11-19 08:37:25,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:37:25,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:25,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:25,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-19 08:37:25,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:25,771 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:37:25,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:25,772 INFO L85 PathProgramCache]: Analyzing trace with hash -2063384036, now seen corresponding path program 1 times [2022-11-19 08:37:25,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:37:25,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497858715] [2022-11-19 08:37:25,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:25,772 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:25,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:37:25,773 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:37:25,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-19 08:37:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:26,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:37:26,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:26,227 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:37:26,227 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:37:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:26,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:37:26,391 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:37:26,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497858715] [2022-11-19 08:37:26,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497858715] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:26,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:37:26,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:37:26,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911880309] [2022-11-19 08:37:26,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:26,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:37:26,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:37:26,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:37:26,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:37:26,392 INFO L87 Difference]: Start difference. First operand 4057 states and 17826 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:26,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:26,649 INFO L93 Difference]: Finished difference Result 4058 states and 17830 transitions. [2022-11-19 08:37:26,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:37:26,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 08:37:26,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:26,662 INFO L225 Difference]: With dead ends: 4058 [2022-11-19 08:37:26,662 INFO L226 Difference]: Without dead ends: 4058 [2022-11-19 08:37:26,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:37:26,662 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:26,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-11-19 08:37:26,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4058 states. [2022-11-19 08:37:26,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4058 to 4058. [2022-11-19 08:37:26,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4058 states, 4017 states have (on average 4.4386357978590985) internal successors, (17830), 4057 states have internal predecessors, (17830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:26,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4058 states to 4058 states and 17830 transitions. [2022-11-19 08:37:26,736 INFO L78 Accepts]: Start accepts. Automaton has 4058 states and 17830 transitions. Word has length 11 [2022-11-19 08:37:26,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:26,736 INFO L495 AbstractCegarLoop]: Abstraction has 4058 states and 17830 transitions. [2022-11-19 08:37:26,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:26,736 INFO L276 IsEmpty]: Start isEmpty. Operand 4058 states and 17830 transitions. [2022-11-19 08:37:26,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:37:26,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:26,737 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:26,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Ended with exit code 0 [2022-11-19 08:37:26,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:26,937 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:37:26,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:26,938 INFO L85 PathProgramCache]: Analyzing trace with hash -2063515538, now seen corresponding path program 1 times [2022-11-19 08:37:26,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:37:26,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074789690] [2022-11-19 08:37:26,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:26,938 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:26,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:37:26,939 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:37:26,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-19 08:37:27,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:27,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:37:27,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:27,375 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:37:27,375 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:37:27,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:27,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:37:27,570 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:37:27,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074789690] [2022-11-19 08:37:27,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074789690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:27,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:37:27,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:37:27,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253760335] [2022-11-19 08:37:27,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:27,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:37:27,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:37:27,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:37:27,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:37:27,572 INFO L87 Difference]: Start difference. First operand 4058 states and 17830 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:27,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:27,824 INFO L93 Difference]: Finished difference Result 4059 states and 17836 transitions. [2022-11-19 08:37:27,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:37:27,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 08:37:27,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:27,837 INFO L225 Difference]: With dead ends: 4059 [2022-11-19 08:37:27,837 INFO L226 Difference]: Without dead ends: 4059 [2022-11-19 08:37:27,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:37:27,838 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:27,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-11-19 08:37:27,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4059 states. [2022-11-19 08:37:27,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4059 to 4059. [2022-11-19 08:37:27,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4059 states, 4018 states have (on average 4.439024390243903) internal successors, (17836), 4058 states have internal predecessors, (17836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:27,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4059 states to 4059 states and 17836 transitions. [2022-11-19 08:37:27,918 INFO L78 Accepts]: Start accepts. Automaton has 4059 states and 17836 transitions. Word has length 11 [2022-11-19 08:37:27,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:27,918 INFO L495 AbstractCegarLoop]: Abstraction has 4059 states and 17836 transitions. [2022-11-19 08:37:27,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:27,918 INFO L276 IsEmpty]: Start isEmpty. Operand 4059 states and 17836 transitions. [2022-11-19 08:37:27,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:37:27,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:27,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:27,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-11-19 08:37:28,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:28,120 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:37:28,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:28,120 INFO L85 PathProgramCache]: Analyzing trace with hash -2063516468, now seen corresponding path program 1 times [2022-11-19 08:37:28,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:37:28,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897341382] [2022-11-19 08:37:28,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:28,121 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:28,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:37:28,122 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:37:28,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-19 08:37:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:28,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:37:28,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:28,587 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:37:28,588 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:37:28,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:28,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:37:28,771 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:37:28,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [897341382] [2022-11-19 08:37:28,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [897341382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:28,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:37:28,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:37:28,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102985763] [2022-11-19 08:37:28,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:28,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:37:28,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:37:28,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:37:28,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:37:28,772 INFO L87 Difference]: Start difference. First operand 4059 states and 17836 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:29,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:29,066 INFO L93 Difference]: Finished difference Result 4059 states and 17835 transitions. [2022-11-19 08:37:29,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:37:29,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 08:37:29,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:29,086 INFO L225 Difference]: With dead ends: 4059 [2022-11-19 08:37:29,086 INFO L226 Difference]: Without dead ends: 4059 [2022-11-19 08:37:29,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:37:29,088 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:29,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-11-19 08:37:29,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4059 states. [2022-11-19 08:37:29,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4059 to 4059. [2022-11-19 08:37:29,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4059 states, 4018 states have (on average 4.438775510204081) internal successors, (17835), 4058 states have internal predecessors, (17835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:29,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4059 states to 4059 states and 17835 transitions. [2022-11-19 08:37:29,163 INFO L78 Accepts]: Start accepts. Automaton has 4059 states and 17835 transitions. Word has length 11 [2022-11-19 08:37:29,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:29,163 INFO L495 AbstractCegarLoop]: Abstraction has 4059 states and 17835 transitions. [2022-11-19 08:37:29,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:29,163 INFO L276 IsEmpty]: Start isEmpty. Operand 4059 states and 17835 transitions. [2022-11-19 08:37:29,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:37:29,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:29,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:29,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Ended with exit code 0 [2022-11-19 08:37:29,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:29,364 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:37:29,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:29,365 INFO L85 PathProgramCache]: Analyzing trace with hash 2136577015, now seen corresponding path program 1 times [2022-11-19 08:37:29,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:37:29,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1563031741] [2022-11-19 08:37:29,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:29,366 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:29,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:37:29,367 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:37:29,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-19 08:37:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:29,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:37:29,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:29,852 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:37:29,853 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:37:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:30,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:37:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:30,650 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:37:30,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1563031741] [2022-11-19 08:37:30,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1563031741] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:37:30,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1120625143] [2022-11-19 08:37:30,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:30,650 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:37:30,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:37:30,651 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:37:30,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2022-11-19 08:37:31,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:31,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:37:31,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:31,337 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:37:31,338 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:37:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:31,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:37:32,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:32,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1120625143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:37:32,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42951749] [2022-11-19 08:37:32,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:32,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:37:32,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:37:32,038 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:37:32,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-11-19 08:37:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:32,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:37:32,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:32,524 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:37:32,524 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:37:32,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:32,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:37:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:32,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42951749] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:37:32,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:37:32,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 14 [2022-11-19 08:37:32,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582958216] [2022-11-19 08:37:32,809 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:37:32,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 08:37:32,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:37:32,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 08:37:32,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:37:32,810 INFO L87 Difference]: Start difference. First operand 4059 states and 17835 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:35,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:35,790 INFO L93 Difference]: Finished difference Result 4156 states and 18057 transitions. [2022-11-19 08:37:35,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:37:35,791 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 08:37:35,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:35,804 INFO L225 Difference]: With dead ends: 4156 [2022-11-19 08:37:35,804 INFO L226 Difference]: Without dead ends: 4156 [2022-11-19 08:37:35,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:37:35,804 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 120 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:35,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 0 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 404 Invalid, 0 Unknown, 75 Unchecked, 2.3s Time] [2022-11-19 08:37:35,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4156 states. [2022-11-19 08:37:35,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4156 to 4133. [2022-11-19 08:37:35,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4133 states, 4092 states have (on average 4.405180840664712) internal successors, (18026), 4132 states have internal predecessors, (18026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:35,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4133 states to 4133 states and 18026 transitions. [2022-11-19 08:37:35,879 INFO L78 Accepts]: Start accepts. Automaton has 4133 states and 18026 transitions. Word has length 11 [2022-11-19 08:37:35,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:35,879 INFO L495 AbstractCegarLoop]: Abstraction has 4133 states and 18026 transitions. [2022-11-19 08:37:35,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:35,880 INFO L276 IsEmpty]: Start isEmpty. Operand 4133 states and 18026 transitions. [2022-11-19 08:37:35,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:37:35,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:35,880 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:35,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (79)] Ended with exit code 0 [2022-11-19 08:37:36,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Ended with exit code 0 [2022-11-19 08:37:36,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-11-19 08:37:36,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:37:36,481 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:37:36,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:36,481 INFO L85 PathProgramCache]: Analyzing trace with hash -858762446, now seen corresponding path program 1 times [2022-11-19 08:37:36,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:37:36,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782280409] [2022-11-19 08:37:36,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:36,482 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:36,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:37:36,483 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:37:36,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-19 08:37:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:36,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:37:36,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:36,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:37,007 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-19 08:37:37,008 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-19 08:37:37,033 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 84 treesize of output 82 [2022-11-19 08:37:37,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:37:37,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:37:38,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:37:38,061 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:37:38,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782280409] [2022-11-19 08:37:38,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782280409] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:37:38,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1911475849] [2022-11-19 08:37:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:38,061 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:37:38,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:37:38,062 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:37:38,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2022-11-19 08:37:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:38,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:37:38,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:38,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:38,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:38,873 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:37:38,874 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 18 treesize of output 53 [2022-11-19 08:37:38,897 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 264 treesize of output 252 [2022-11-19 08:37:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:37:39,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:37:39,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1911475849] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:39,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:37:39,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-19 08:37:39,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796509951] [2022-11-19 08:37:39,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:39,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:37:39,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:37:39,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:37:39,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:37:39,088 INFO L87 Difference]: Start difference. First operand 4133 states and 18026 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:39,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:39,250 INFO L93 Difference]: Finished difference Result 4139 states and 18044 transitions. [2022-11-19 08:37:39,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:37:39,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 11 [2022-11-19 08:37:39,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:39,264 INFO L225 Difference]: With dead ends: 4139 [2022-11-19 08:37:39,264 INFO L226 Difference]: Without dead ends: 4139 [2022-11-19 08:37:39,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:37:39,264 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:39,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-11-19 08:37:39,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2022-11-19 08:37:39,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 4139. [2022-11-19 08:37:39,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4139 states, 4098 states have (on average 4.403123474865788) internal successors, (18044), 4138 states have internal predecessors, (18044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:39,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 18044 transitions. [2022-11-19 08:37:39,361 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 18044 transitions. Word has length 11 [2022-11-19 08:37:39,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:39,361 INFO L495 AbstractCegarLoop]: Abstraction has 4139 states and 18044 transitions. [2022-11-19 08:37:39,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:39,361 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 18044 transitions. [2022-11-19 08:37:39,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:37:39,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:39,362 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:39,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (82)] Ended with exit code 0 [2022-11-19 08:37:39,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-19 08:37:39,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:39,763 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:37:39,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:39,763 INFO L85 PathProgramCache]: Analyzing trace with hash -858762415, now seen corresponding path program 1 times [2022-11-19 08:37:39,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:37:39,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007142152] [2022-11-19 08:37:39,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:39,764 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:39,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:37:39,765 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:37:39,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Waiting until timeout for monitored process [2022-11-19 08:37:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:40,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:37:40,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:40,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:40,284 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-19 08:37:40,285 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-19 08:37:40,303 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 [2022-11-19 08:37:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:40,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:37:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:41,277 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:37:41,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007142152] [2022-11-19 08:37:41,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007142152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:37:41,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1694914433] [2022-11-19 08:37:41,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:41,277 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:37:41,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:37:41,278 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:37:41,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (84)] Waiting until timeout for monitored process [2022-11-19 08:37:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:41,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:37:41,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:41,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:41,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:42,007 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:37:42,008 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 18 treesize of output 53 [2022-11-19 08:37:42,032 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 300 treesize of output 292 [2022-11-19 08:37:42,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:37:42,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:37:42,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1694914433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:42,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:37:42,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-19 08:37:42,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063323904] [2022-11-19 08:37:42,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:42,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:37:42,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:37:42,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:37:42,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:37:42,232 INFO L87 Difference]: Start difference. First operand 4139 states and 18044 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:42,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:42,357 INFO L93 Difference]: Finished difference Result 4147 states and 18065 transitions. [2022-11-19 08:37:42,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:37:42,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 11 [2022-11-19 08:37:42,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:42,370 INFO L225 Difference]: With dead ends: 4147 [2022-11-19 08:37:42,370 INFO L226 Difference]: Without dead ends: 4147 [2022-11-19 08:37:42,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:37:42,370 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:42,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-11-19 08:37:42,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4147 states. [2022-11-19 08:37:42,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4147 to 4147. [2022-11-19 08:37:42,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4147 states, 4106 states have (on average 4.39965903555772) internal successors, (18065), 4146 states have internal predecessors, (18065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:42,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4147 states to 4147 states and 18065 transitions. [2022-11-19 08:37:42,447 INFO L78 Accepts]: Start accepts. Automaton has 4147 states and 18065 transitions. Word has length 11 [2022-11-19 08:37:42,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:42,448 INFO L495 AbstractCegarLoop]: Abstraction has 4147 states and 18065 transitions. [2022-11-19 08:37:42,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:42,448 INFO L276 IsEmpty]: Start isEmpty. Operand 4147 states and 18065 transitions. [2022-11-19 08:37:42,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:37:42,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:42,449 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:42,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (84)] Forceful destruction successful, exit code 0 [2022-11-19 08:37:42,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (83)] Ended with exit code 0 [2022-11-19 08:37:42,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:42,854 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:37:42,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:42,855 INFO L85 PathProgramCache]: Analyzing trace with hash 608000322, now seen corresponding path program 1 times [2022-11-19 08:37:42,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:37:42,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747907889] [2022-11-19 08:37:42,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:42,855 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:42,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:37:42,856 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:37:42,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-19 08:37:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:43,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:37:43,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:43,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:43,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:43,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:43,361 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-19 08:37:43,361 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 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-19 08:37:43,380 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 18 treesize of output 16 [2022-11-19 08:37:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:43,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:37:44,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:44,413 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:37:44,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747907889] [2022-11-19 08:37:44,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747907889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:37:44,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [432562623] [2022-11-19 08:37:44,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:44,413 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:37:44,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:37:44,415 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:37:44,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (86)] Waiting until timeout for monitored process [2022-11-19 08:37:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:44,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:37:44,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:44,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:45,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:45,173 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:37:45,173 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 18 treesize of output 53 [2022-11-19 08:37:45,195 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 88 treesize of output 84 [2022-11-19 08:37:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 08:37:45,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:37:45,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [432562623] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:45,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:37:45,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-19 08:37:45,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773584053] [2022-11-19 08:37:45,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:45,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:37:45,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:37:45,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:37:45,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:37:45,375 INFO L87 Difference]: Start difference. First operand 4147 states and 18065 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:45,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:45,511 INFO L93 Difference]: Finished difference Result 4151 states and 18076 transitions. [2022-11-19 08:37:45,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:37:45,512 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 11 [2022-11-19 08:37:45,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:45,524 INFO L225 Difference]: With dead ends: 4151 [2022-11-19 08:37:45,524 INFO L226 Difference]: Without dead ends: 4151 [2022-11-19 08:37:45,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:37:45,525 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:45,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-19 08:37:45,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2022-11-19 08:37:45,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 4150. [2022-11-19 08:37:45,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4150 states, 4109 states have (on average 4.398637137989779) internal successors, (18074), 4149 states have internal predecessors, (18074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:45,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4150 states to 4150 states and 18074 transitions. [2022-11-19 08:37:45,603 INFO L78 Accepts]: Start accepts. Automaton has 4150 states and 18074 transitions. Word has length 11 [2022-11-19 08:37:45,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:45,603 INFO L495 AbstractCegarLoop]: Abstraction has 4150 states and 18074 transitions. [2022-11-19 08:37:45,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:45,603 INFO L276 IsEmpty]: Start isEmpty. Operand 4150 states and 18074 transitions. [2022-11-19 08:37:45,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:37:45,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:45,604 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:45,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (86)] Forceful destruction successful, exit code 0 [2022-11-19 08:37:45,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Ended with exit code 0 [2022-11-19 08:37:46,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:46,005 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:37:46,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:46,005 INFO L85 PathProgramCache]: Analyzing trace with hash 608000353, now seen corresponding path program 1 times [2022-11-19 08:37:46,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:37:46,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [923724223] [2022-11-19 08:37:46,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:46,032 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:46,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:37:46,034 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:37:46,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Waiting until timeout for monitored process [2022-11-19 08:37:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:46,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:37:46,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:46,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:46,583 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-19 08:37:46,583 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-19 08:37:46,607 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 [2022-11-19 08:37:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:37:47,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:37:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:37:47,529 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:37:47,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [923724223] [2022-11-19 08:37:47,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [923724223] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:37:47,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1183078633] [2022-11-19 08:37:47,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:47,530 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:37:47,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:37:47,530 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:37:47,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (88)] Waiting until timeout for monitored process [2022-11-19 08:37:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:48,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:37:48,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:48,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:48,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:48,262 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:37:48,262 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 18 treesize of output 53 [2022-11-19 08:37:48,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2022-11-19 08:37:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:37:48,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:37:48,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1183078633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:48,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:37:48,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-19 08:37:48,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396537917] [2022-11-19 08:37:48,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:48,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:37:48,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:37:48,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:37:48,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:37:48,507 INFO L87 Difference]: Start difference. First operand 4150 states and 18074 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:48,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:48,636 INFO L93 Difference]: Finished difference Result 4151 states and 18079 transitions. [2022-11-19 08:37:48,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:37:48,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 11 [2022-11-19 08:37:48,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:48,647 INFO L225 Difference]: With dead ends: 4151 [2022-11-19 08:37:48,647 INFO L226 Difference]: Without dead ends: 4151 [2022-11-19 08:37:48,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:37:48,648 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:48,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-19 08:37:48,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2022-11-19 08:37:48,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 4149. [2022-11-19 08:37:48,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4149 states, 4108 states have (on average 4.399707887049659) internal successors, (18074), 4148 states have internal predecessors, (18074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:48,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4149 states to 4149 states and 18074 transitions. [2022-11-19 08:37:48,715 INFO L78 Accepts]: Start accepts. Automaton has 4149 states and 18074 transitions. Word has length 11 [2022-11-19 08:37:48,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:48,715 INFO L495 AbstractCegarLoop]: Abstraction has 4149 states and 18074 transitions. [2022-11-19 08:37:48,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:48,715 INFO L276 IsEmpty]: Start isEmpty. Operand 4149 states and 18074 transitions. [2022-11-19 08:37:48,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:37:48,716 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:48,716 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:48,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (88)] Ended with exit code 0 [2022-11-19 08:37:48,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (87)] Ended with exit code 0 [2022-11-19 08:37:49,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:49,117 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:37:49,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:49,117 INFO L85 PathProgramCache]: Analyzing trace with hash 2043006904, now seen corresponding path program 1 times [2022-11-19 08:37:49,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:37:49,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1054042440] [2022-11-19 08:37:49,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:49,117 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:49,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:37:49,118 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:37:49,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-19 08:37:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:49,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:37:49,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:49,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:49,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:49,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:49,620 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-19 08:37:49,620 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 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-19 08:37:49,637 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 18 treesize of output 16 [2022-11-19 08:37:50,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:50,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:37:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:50,773 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:37:50,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1054042440] [2022-11-19 08:37:50,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1054042440] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:37:50,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [25356911] [2022-11-19 08:37:50,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:50,773 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:37:50,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:37:50,774 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:37:50,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (90)] Waiting until timeout for monitored process [2022-11-19 08:37:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:51,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:37:51,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:51,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:51,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:37:51,531 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:37:51,531 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 18 treesize of output 53 [2022-11-19 08:37:51,556 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 167 treesize of output 163 [2022-11-19 08:37:51,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:37:51,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:37:51,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [25356911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:37:51,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:37:51,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5, 5] total 11 [2022-11-19 08:37:51,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651949754] [2022-11-19 08:37:51,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:37:51,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:37:51,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:37:51,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:37:51,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:37:51,727 INFO L87 Difference]: Start difference. First operand 4149 states and 18074 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:51,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:51,848 INFO L93 Difference]: Finished difference Result 4148 states and 18071 transitions. [2022-11-19 08:37:51,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:37:51,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 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 11 [2022-11-19 08:37:51,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:51,860 INFO L225 Difference]: With dead ends: 4148 [2022-11-19 08:37:51,860 INFO L226 Difference]: Without dead ends: 4148 [2022-11-19 08:37:51,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:37:51,861 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:51,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-11-19 08:37:51,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4148 states. [2022-11-19 08:37:51,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4148 to 4148. [2022-11-19 08:37:51,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4148 states, 4107 states have (on average 4.400048697345994) internal successors, (18071), 4147 states have internal predecessors, (18071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:51,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4148 states to 4148 states and 18071 transitions. [2022-11-19 08:37:51,927 INFO L78 Accepts]: Start accepts. Automaton has 4148 states and 18071 transitions. Word has length 11 [2022-11-19 08:37:51,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:51,928 INFO L495 AbstractCegarLoop]: Abstraction has 4148 states and 18071 transitions. [2022-11-19 08:37:51,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:51,928 INFO L276 IsEmpty]: Start isEmpty. Operand 4148 states and 18071 transitions. [2022-11-19 08:37:51,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:37:51,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:51,928 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:51,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Ended with exit code 0 [2022-11-19 08:37:52,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (90)] Ended with exit code 0 [2022-11-19 08:37:52,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:37:52,329 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:37:52,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:52,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1994501177, now seen corresponding path program 1 times [2022-11-19 08:37:52,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:37:52,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1489541482] [2022-11-19 08:37:52,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:52,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:52,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:37:52,331 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:37:52,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Waiting until timeout for monitored process [2022-11-19 08:37:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:52,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:37:52,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:52,813 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:37:52,814 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:37:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:53,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:37:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:53,638 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:37:53,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1489541482] [2022-11-19 08:37:53,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1489541482] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:37:53,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1890365253] [2022-11-19 08:37:53,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:53,639 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:37:53,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:37:53,640 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:37:53,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (92)] Waiting until timeout for monitored process [2022-11-19 08:37:54,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:54,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:37:54,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:54,369 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:37:54,370 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:37:54,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:54,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:37:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:55,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1890365253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:37:55,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446733986] [2022-11-19 08:37:55,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:55,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:37:55,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:37:55,098 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:37:55,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-11-19 08:37:55,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:55,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:37:55,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:55,614 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:37:55,614 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:37:55,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:55,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:37:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:55,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446733986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:37:55,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:37:55,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 14 [2022-11-19 08:37:55,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643044535] [2022-11-19 08:37:55,896 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:37:55,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 08:37:55,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:37:55,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 08:37:55,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:37:55,897 INFO L87 Difference]: Start difference. First operand 4148 states and 18071 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:58,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:37:58,373 INFO L93 Difference]: Finished difference Result 4173 states and 18107 transitions. [2022-11-19 08:37:58,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:37:58,374 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 08:37:58,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:37:58,386 INFO L225 Difference]: With dead ends: 4173 [2022-11-19 08:37:58,386 INFO L226 Difference]: Without dead ends: 4173 [2022-11-19 08:37:58,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:37:58,387 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 202 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:37:58,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 0 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 386 Invalid, 0 Unknown, 39 Unchecked, 1.8s Time] [2022-11-19 08:37:58,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4173 states. [2022-11-19 08:37:58,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4173 to 4150. [2022-11-19 08:37:58,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4150 states, 4109 states have (on average 4.399123874422001) internal successors, (18076), 4149 states have internal predecessors, (18076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:58,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4150 states to 4150 states and 18076 transitions. [2022-11-19 08:37:58,485 INFO L78 Accepts]: Start accepts. Automaton has 4150 states and 18076 transitions. Word has length 12 [2022-11-19 08:37:58,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:37:58,485 INFO L495 AbstractCegarLoop]: Abstraction has 4150 states and 18076 transitions. [2022-11-19 08:37:58,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:37:58,485 INFO L276 IsEmpty]: Start isEmpty. Operand 4150 states and 18076 transitions. [2022-11-19 08:37:58,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:37:58,486 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:37:58,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:37:58,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-11-19 08:37:58,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (91)] Ended with exit code 0 [2022-11-19 08:37:58,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (92)] Forceful destruction successful, exit code 0 [2022-11-19 08:37:59,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:37:59,091 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:37:59,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:37:59,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1995424698, now seen corresponding path program 1 times [2022-11-19 08:37:59,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:37:59,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1335859763] [2022-11-19 08:37:59,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:37:59,092 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:37:59,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:37:59,093 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:37:59,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-19 08:37:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:37:59,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:37:59,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:37:59,621 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:37:59,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:37:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:37:59,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:38:00,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:00,529 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:38:00,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1335859763] [2022-11-19 08:38:00,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1335859763] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:38:00,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1459149401] [2022-11-19 08:38:00,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:00,530 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:38:00,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:38:00,531 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:38:00,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (95)] Waiting until timeout for monitored process [2022-11-19 08:38:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:01,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:38:01,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:01,277 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:38:01,278 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:38:01,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:01,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:38:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:02,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1459149401] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:38:02,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262596304] [2022-11-19 08:38:02,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:02,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:38:02,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:38:02,078 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:38:02,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-11-19 08:38:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:02,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:38:02,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:02,612 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:38:02,612 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:38:02,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:02,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:38:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:02,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262596304] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:38:02,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:38:02,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 14 [2022-11-19 08:38:02,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752871004] [2022-11-19 08:38:02,961 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:38:02,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 08:38:02,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:38:02,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 08:38:02,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:38:02,962 INFO L87 Difference]: Start difference. First operand 4150 states and 18076 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:06,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:38:06,106 INFO L93 Difference]: Finished difference Result 4583 states and 19502 transitions. [2022-11-19 08:38:06,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:38:06,108 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 08:38:06,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:38:06,121 INFO L225 Difference]: With dead ends: 4583 [2022-11-19 08:38:06,121 INFO L226 Difference]: Without dead ends: 4583 [2022-11-19 08:38:06,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-11-19 08:38:06,122 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 168 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:38:06,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 0 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 537 Invalid, 0 Unknown, 50 Unchecked, 2.5s Time] [2022-11-19 08:38:06,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4583 states. [2022-11-19 08:38:06,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4583 to 4152. [2022-11-19 08:38:06,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4152 states, 4111 states have (on average 4.398199951350036) internal successors, (18081), 4151 states have internal predecessors, (18081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:06,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4152 states to 4152 states and 18081 transitions. [2022-11-19 08:38:06,240 INFO L78 Accepts]: Start accepts. Automaton has 4152 states and 18081 transitions. Word has length 12 [2022-11-19 08:38:06,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:38:06,241 INFO L495 AbstractCegarLoop]: Abstraction has 4152 states and 18081 transitions. [2022-11-19 08:38:06,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:06,241 INFO L276 IsEmpty]: Start isEmpty. Operand 4152 states and 18081 transitions. [2022-11-19 08:38:06,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:38:06,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:38:06,242 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:38:06,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-11-19 08:38:06,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (95)] Ended with exit code 0 [2022-11-19 08:38:06,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Ended with exit code 0 [2022-11-19 08:38:06,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:38:06,843 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:38:06,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:38:06,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1810958826, now seen corresponding path program 1 times [2022-11-19 08:38:06,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:38:06,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [415594952] [2022-11-19 08:38:06,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:06,844 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:38:06,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:38:06,845 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:38:06,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-11-19 08:38:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:07,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:38:07,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:07,352 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:38:07,353 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:38:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:07,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:38:08,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:08,142 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:38:08,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [415594952] [2022-11-19 08:38:08,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [415594952] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:38:08,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [735173686] [2022-11-19 08:38:08,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:08,143 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:38:08,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:38:08,145 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:38:08,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (98)] Waiting until timeout for monitored process [2022-11-19 08:38:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:08,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:38:08,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:08,871 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:38:08,871 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:38:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:09,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:38:09,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:09,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [735173686] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:38:09,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047089879] [2022-11-19 08:38:09,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:09,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:38:09,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:38:09,576 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:38:09,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-11-19 08:38:09,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:09,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:38:09,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:10,107 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:38:10,107 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:38:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:10,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:38:10,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:10,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047089879] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:38:10,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:38:10,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 14 [2022-11-19 08:38:10,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289894998] [2022-11-19 08:38:10,423 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:38:10,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 08:38:10,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:38:10,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 08:38:10,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:38:10,423 INFO L87 Difference]: Start difference. First operand 4152 states and 18081 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:13,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:38:13,751 INFO L93 Difference]: Finished difference Result 4579 states and 19485 transitions. [2022-11-19 08:38:13,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:38:13,752 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 08:38:13,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:38:13,765 INFO L225 Difference]: With dead ends: 4579 [2022-11-19 08:38:13,765 INFO L226 Difference]: Without dead ends: 4579 [2022-11-19 08:38:13,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-11-19 08:38:13,766 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 194 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:38:13,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 0 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 563 Invalid, 0 Unknown, 51 Unchecked, 2.7s Time] [2022-11-19 08:38:13,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4579 states. [2022-11-19 08:38:13,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4579 to 4153. [2022-11-19 08:38:13,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4153 states, 4112 states have (on average 4.398103112840467) internal successors, (18085), 4152 states have internal predecessors, (18085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:13,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4153 states to 4153 states and 18085 transitions. [2022-11-19 08:38:13,845 INFO L78 Accepts]: Start accepts. Automaton has 4153 states and 18085 transitions. Word has length 12 [2022-11-19 08:38:13,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:38:13,845 INFO L495 AbstractCegarLoop]: Abstraction has 4153 states and 18085 transitions. [2022-11-19 08:38:13,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:13,846 INFO L276 IsEmpty]: Start isEmpty. Operand 4153 states and 18085 transitions. [2022-11-19 08:38:13,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:38:13,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:38:13,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:38:13,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-11-19 08:38:14,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Ended with exit code 0 [2022-11-19 08:38:14,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (98)] Forceful destruction successful, exit code 0 [2022-11-19 08:38:14,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:38:14,455 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:38:14,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:38:14,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1810827324, now seen corresponding path program 1 times [2022-11-19 08:38:14,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:38:14,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1808600011] [2022-11-19 08:38:14,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:14,456 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:38:14,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:38:14,456 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:38:14,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-19 08:38:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:14,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:38:14,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:14,979 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:38:14,979 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:38:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:15,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:38:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:15,823 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:38:15,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1808600011] [2022-11-19 08:38:15,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1808600011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:38:15,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1613828669] [2022-11-19 08:38:15,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:15,824 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:38:15,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:38:15,825 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:38:15,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (101)] Waiting until timeout for monitored process [2022-11-19 08:38:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:16,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:38:16,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:16,561 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:38:16,561 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:38:16,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:16,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:38:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:17,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1613828669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:38:17,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788390152] [2022-11-19 08:38:17,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:17,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:38:17,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:38:17,350 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:38:17,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-11-19 08:38:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:17,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:38:17,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:17,930 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:38:17,930 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:38:18,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:18,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:38:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:18,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788390152] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:38:18,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:38:18,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 14 [2022-11-19 08:38:18,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53108560] [2022-11-19 08:38:18,227 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:38:18,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 08:38:18,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:38:18,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 08:38:18,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:38:18,227 INFO L87 Difference]: Start difference. First operand 4153 states and 18085 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:21,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:38:21,463 INFO L93 Difference]: Finished difference Result 6266 states and 27389 transitions. [2022-11-19 08:38:21,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 08:38:21,464 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 08:38:21,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:38:21,486 INFO L225 Difference]: With dead ends: 6266 [2022-11-19 08:38:21,486 INFO L226 Difference]: Without dead ends: 6266 [2022-11-19 08:38:21,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:38:21,487 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 162 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:38:21,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 0 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 516 Invalid, 0 Unknown, 48 Unchecked, 2.5s Time] [2022-11-19 08:38:21,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6266 states. [2022-11-19 08:38:21,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6266 to 4154. [2022-11-19 08:38:21,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4154 states, 4113 states have (on average 4.398492584488208) internal successors, (18091), 4153 states have internal predecessors, (18091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:21,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4154 states to 4154 states and 18091 transitions. [2022-11-19 08:38:21,591 INFO L78 Accepts]: Start accepts. Automaton has 4154 states and 18091 transitions. Word has length 12 [2022-11-19 08:38:21,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:38:21,592 INFO L495 AbstractCegarLoop]: Abstraction has 4154 states and 18091 transitions. [2022-11-19 08:38:21,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:21,592 INFO L276 IsEmpty]: Start isEmpty. Operand 4154 states and 18091 transitions. [2022-11-19 08:38:21,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:38:21,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:38:21,593 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:38:21,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (101)] Forceful destruction successful, exit code 0 [2022-11-19 08:38:21,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Ended with exit code 0 [2022-11-19 08:38:21,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-11-19 08:38:22,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:38:22,193 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:38:22,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:38:22,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1810826394, now seen corresponding path program 1 times [2022-11-19 08:38:22,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:38:22,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889380129] [2022-11-19 08:38:22,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:22,194 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:38:22,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:38:22,195 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:38:22,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-11-19 08:38:22,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:22,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:38:22,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:22,708 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:38:22,708 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:38:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:22,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:38:23,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:23,503 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:38:23,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889380129] [2022-11-19 08:38:23,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1889380129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:38:23,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1702213174] [2022-11-19 08:38:23,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:23,504 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:38:23,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:38:23,505 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:38:23,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (104)] Waiting until timeout for monitored process [2022-11-19 08:38:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:24,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:38:24,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:24,258 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:38:24,258 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:38:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:24,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:38:25,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:25,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1702213174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:38:25,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879102584] [2022-11-19 08:38:25,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:25,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:38:25,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:38:25,021 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:38:25,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-11-19 08:38:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:25,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:38:25,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:25,569 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:38:25,570 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:38:25,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:25,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:38:25,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:25,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879102584] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:38:25,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:38:25,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 14 [2022-11-19 08:38:25,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165707127] [2022-11-19 08:38:25,916 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:38:25,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 08:38:25,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:38:25,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 08:38:25,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-19 08:38:25,917 INFO L87 Difference]: Start difference. First operand 4154 states and 18091 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:27,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:38:27,843 INFO L93 Difference]: Finished difference Result 4177 states and 18121 transitions. [2022-11-19 08:38:27,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:38:27,845 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 08:38:27,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:38:27,857 INFO L225 Difference]: With dead ends: 4177 [2022-11-19 08:38:27,857 INFO L226 Difference]: Without dead ends: 4177 [2022-11-19 08:38:27,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-11-19 08:38:27,857 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 143 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:38:27,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 0 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 288 Invalid, 0 Unknown, 163 Unchecked, 1.3s Time] [2022-11-19 08:38:27,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4177 states. [2022-11-19 08:38:27,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4177 to 4154. [2022-11-19 08:38:27,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4154 states, 4113 states have (on average 4.398249452954048) internal successors, (18090), 4153 states have internal predecessors, (18090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:27,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4154 states to 4154 states and 18090 transitions. [2022-11-19 08:38:27,940 INFO L78 Accepts]: Start accepts. Automaton has 4154 states and 18090 transitions. Word has length 12 [2022-11-19 08:38:27,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:38:27,941 INFO L495 AbstractCegarLoop]: Abstraction has 4154 states and 18090 transitions. [2022-11-19 08:38:27,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:27,941 INFO L276 IsEmpty]: Start isEmpty. Operand 4154 states and 18090 transitions. [2022-11-19 08:38:27,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:38:27,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:38:27,942 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:38:27,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (104)] Ended with exit code 0 [2022-11-19 08:38:28,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Ended with exit code 0 [2022-11-19 08:38:28,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-11-19 08:38:28,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:38:28,545 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:38:28,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:38:28,545 INFO L85 PathProgramCache]: Analyzing trace with hash -851830797, now seen corresponding path program 1 times [2022-11-19 08:38:28,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:38:28,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282526046] [2022-11-19 08:38:28,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:28,546 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:38:28,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:38:28,546 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:38:28,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2022-11-19 08:38:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:28,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:38:28,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:28,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:38:29,123 INFO L321 Elim1Store]: treesize reduction 125, result has 29.4 percent of original size [2022-11-19 08:38:29,124 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 4 case distinctions, treesize of input 20 treesize of output 59 [2022-11-19 08:38:29,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 126 [2022-11-19 08:38:29,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:38:29,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:38:30,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:38:30,243 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:38:30,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282526046] [2022-11-19 08:38:30,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282526046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:38:30,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [474184137] [2022-11-19 08:38:30,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:30,244 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:38:30,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:38:30,245 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:38:30,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (107)] Waiting until timeout for monitored process [2022-11-19 08:38:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:30,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:38:30,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:30,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:38:30,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:38:31,144 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:38:31,144 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 18 treesize of output 53 [2022-11-19 08:38:31,167 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 323 treesize of output 315 [2022-11-19 08:38:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:38:31,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:38:31,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [474184137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:38:31,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:38:31,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-19 08:38:31,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423351233] [2022-11-19 08:38:31,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:38:31,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:38:31,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:38:31,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:38:31,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:38:31,377 INFO L87 Difference]: Start difference. First operand 4154 states and 18090 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:31,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:38:31,507 INFO L93 Difference]: Finished difference Result 4158 states and 18098 transitions. [2022-11-19 08:38:31,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:38:31,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 08:38:31,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:38:31,521 INFO L225 Difference]: With dead ends: 4158 [2022-11-19 08:38:31,521 INFO L226 Difference]: Without dead ends: 4158 [2022-11-19 08:38:31,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:38:31,522 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:38:31,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-11-19 08:38:31,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4158 states. [2022-11-19 08:38:31,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4158 to 4157. [2022-11-19 08:38:31,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4157 states, 4116 states have (on average 4.396744412050534) internal successors, (18097), 4156 states have internal predecessors, (18097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:31,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4157 states to 4157 states and 18097 transitions. [2022-11-19 08:38:31,605 INFO L78 Accepts]: Start accepts. Automaton has 4157 states and 18097 transitions. Word has length 12 [2022-11-19 08:38:31,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:38:31,605 INFO L495 AbstractCegarLoop]: Abstraction has 4157 states and 18097 transitions. [2022-11-19 08:38:31,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:31,606 INFO L276 IsEmpty]: Start isEmpty. Operand 4157 states and 18097 transitions. [2022-11-19 08:38:31,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:38:31,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:38:31,607 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:38:31,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Forceful destruction successful, exit code 0 [2022-11-19 08:38:31,815 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (107)] Ended with exit code 0 [2022-11-19 08:38:32,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:38:32,011 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:38:32,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:38:32,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1668142051, now seen corresponding path program 1 times [2022-11-19 08:38:32,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:38:32,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516438405] [2022-11-19 08:38:32,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:32,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:38:32,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:38:32,012 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:38:32,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2022-11-19 08:38:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:32,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 08:38:32,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:32,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:38:32,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:38:32,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:38:32,552 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-19 08:38:32,552 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 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-19 08:38:32,570 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 18 treesize of output 16 [2022-11-19 08:38:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:38:33,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:38:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:38:33,609 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:38:33,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516438405] [2022-11-19 08:38:33,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516438405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:38:33,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1054444467] [2022-11-19 08:38:33,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:33,610 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:38:33,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:38:33,611 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:38:33,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (109)] Waiting until timeout for monitored process [2022-11-19 08:38:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:34,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:38:34,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:34,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:38:34,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:38:34,490 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:38:34,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 53 [2022-11-19 08:38:34,512 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 510 treesize of output 494 [2022-11-19 08:38:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:38:34,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:38:34,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1054444467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:38:34,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:38:34,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4, 4] total 9 [2022-11-19 08:38:34,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69419133] [2022-11-19 08:38:34,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:38:34,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:38:34,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:38:34,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:38:34,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:38:34,744 INFO L87 Difference]: Start difference. First operand 4157 states and 18097 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:34,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:38:34,888 INFO L93 Difference]: Finished difference Result 4159 states and 18099 transitions. [2022-11-19 08:38:34,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:38:34,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 08:38:34,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:38:34,902 INFO L225 Difference]: With dead ends: 4159 [2022-11-19 08:38:34,902 INFO L226 Difference]: Without dead ends: 4159 [2022-11-19 08:38:34,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:38:34,902 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:38:34,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-19 08:38:34,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4159 states. [2022-11-19 08:38:34,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4159 to 4154. [2022-11-19 08:38:34,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4154 states, 4113 states have (on average 4.398249452954048) internal successors, (18090), 4153 states have internal predecessors, (18090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:34,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4154 states to 4154 states and 18090 transitions. [2022-11-19 08:38:34,981 INFO L78 Accepts]: Start accepts. Automaton has 4154 states and 18090 transitions. Word has length 12 [2022-11-19 08:38:34,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:38:34,981 INFO L495 AbstractCegarLoop]: Abstraction has 4154 states and 18090 transitions. [2022-11-19 08:38:34,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:34,981 INFO L276 IsEmpty]: Start isEmpty. Operand 4154 states and 18090 transitions. [2022-11-19 08:38:34,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:38:34,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:38:34,983 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:38:34,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (109)] Forceful destruction successful, exit code 0 [2022-11-19 08:38:35,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Forceful destruction successful, exit code 0 [2022-11-19 08:38:35,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:38:35,390 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:38:35,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:38:35,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1715952581, now seen corresponding path program 2 times [2022-11-19 08:38:35,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:38:35,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1698057455] [2022-11-19 08:38:35,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:38:35,391 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:38:35,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:38:35,392 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:38:35,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2022-11-19 08:38:35,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:38:35,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:38:35,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:38:35,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:35,971 INFO L321 Elim1Store]: treesize reduction 146, result has 27.4 percent of original size [2022-11-19 08:38:35,972 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 4 case distinctions, treesize of input 22 treesize of output 64 [2022-11-19 08:38:36,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:36,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:38:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:37,119 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:38:37,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1698057455] [2022-11-19 08:38:37,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1698057455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:38:37,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [674910160] [2022-11-19 08:38:37,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:38:37,120 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:38:37,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:38:37,121 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:38:37,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (111)] Waiting until timeout for monitored process [2022-11-19 08:38:37,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:38:37,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:38:37,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 08:38:37,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:38,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:38:38,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:38,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [674910160] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:38:38,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947374402] [2022-11-19 08:38:38,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:38:38,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:38:38,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:38:38,725 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:38:38,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-11-19 08:38:39,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:38:39,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:38:39,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 08:38:39,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:39,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:38:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:39,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947374402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:38:39,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:38:39,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 22 [2022-11-19 08:38:39,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714173424] [2022-11-19 08:38:39,558 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:38:39,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 08:38:39,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:38:39,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 08:38:39,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-11-19 08:38:39,560 INFO L87 Difference]: Start difference. First operand 4154 states and 18090 transitions. Second operand has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:46,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:38:49,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:38:49,861 INFO L93 Difference]: Finished difference Result 8478 states and 36240 transitions. [2022-11-19 08:38:49,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 08:38:49,862 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 08:38:49,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:38:49,888 INFO L225 Difference]: With dead ends: 8478 [2022-11-19 08:38:49,888 INFO L226 Difference]: Without dead ends: 8454 [2022-11-19 08:38:49,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=305, Invalid=1177, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 08:38:49,889 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2013 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2013 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:38:49,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2013 Valid, 0 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1208 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-11-19 08:38:49,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8454 states. [2022-11-19 08:38:50,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8454 to 7766. [2022-11-19 08:38:50,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7766 states, 7725 states have (on average 4.478187702265372) internal successors, (34594), 7765 states have internal predecessors, (34594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:50,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7766 states to 7766 states and 34594 transitions. [2022-11-19 08:38:50,058 INFO L78 Accepts]: Start accepts. Automaton has 7766 states and 34594 transitions. Word has length 12 [2022-11-19 08:38:50,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:38:50,058 INFO L495 AbstractCegarLoop]: Abstraction has 7766 states and 34594 transitions. [2022-11-19 08:38:50,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:50,058 INFO L276 IsEmpty]: Start isEmpty. Operand 7766 states and 34594 transitions. [2022-11-19 08:38:50,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:38:50,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:38:50,059 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:38:50,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (110)] Forceful destruction successful, exit code 0 [2022-11-19 08:38:50,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (111)] Ended with exit code 0 [2022-11-19 08:38:50,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-11-19 08:38:50,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:38:50,673 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:38:50,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:38:50,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1279388616, now seen corresponding path program 1 times [2022-11-19 08:38:50,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:38:50,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [951355989] [2022-11-19 08:38:50,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:50,673 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:38:50,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:38:50,674 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:38:50,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (113)] Waiting until timeout for monitored process [2022-11-19 08:38:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:51,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:38:51,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:51,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:38:51,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:38:51,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:38:51,272 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-19 08:38:51,273 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 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-19 08:38:51,291 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 18 treesize of output 16 [2022-11-19 08:38:51,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:51,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:38:52,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:52,517 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:38:52,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [951355989] [2022-11-19 08:38:52,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [951355989] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:38:52,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [894513730] [2022-11-19 08:38:52,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:52,517 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:38:52,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:38:52,518 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:38:52,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (114)] Waiting until timeout for monitored process [2022-11-19 08:38:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:53,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:38:53,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:53,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:38:53,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:38:53,515 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:38:53,516 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 18 treesize of output 53 [2022-11-19 08:38:53,591 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 120 treesize of output 116 [2022-11-19 08:38:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:38:53,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:38:53,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [894513730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:38:53,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:38:53,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5, 5] total 11 [2022-11-19 08:38:53,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160712146] [2022-11-19 08:38:53,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:38:53,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:38:53,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:38:53,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:38:53,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:38:53,786 INFO L87 Difference]: Start difference. First operand 7766 states and 34594 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:53,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:38:53,930 INFO L93 Difference]: Finished difference Result 7770 states and 34608 transitions. [2022-11-19 08:38:53,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:38:53,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 12 [2022-11-19 08:38:53,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:38:53,956 INFO L225 Difference]: With dead ends: 7770 [2022-11-19 08:38:53,956 INFO L226 Difference]: Without dead ends: 7770 [2022-11-19 08:38:53,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:38:53,957 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:38:53,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-11-19 08:38:53,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7770 states. [2022-11-19 08:38:54,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7770 to 7769. [2022-11-19 08:38:54,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7769 states, 7728 states have (on average 4.477872670807454) internal successors, (34605), 7768 states have internal predecessors, (34605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:54,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7769 states to 7769 states and 34605 transitions. [2022-11-19 08:38:54,147 INFO L78 Accepts]: Start accepts. Automaton has 7769 states and 34605 transitions. Word has length 12 [2022-11-19 08:38:54,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:38:54,147 INFO L495 AbstractCegarLoop]: Abstraction has 7769 states and 34605 transitions. [2022-11-19 08:38:54,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:54,147 INFO L276 IsEmpty]: Start isEmpty. Operand 7769 states and 34605 transitions. [2022-11-19 08:38:54,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:38:54,148 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:38:54,148 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:38:54,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (114)] Ended with exit code 0 [2022-11-19 08:38:54,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (113)] Ended with exit code 0 [2022-11-19 08:38:54,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:38:54,551 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:38:54,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:38:54,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1091301355, now seen corresponding path program 1 times [2022-11-19 08:38:54,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:38:54,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001734557] [2022-11-19 08:38:54,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:54,552 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:38:54,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:38:54,552 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:38:54,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2022-11-19 08:38:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:54,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:38:54,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:54,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:38:54,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:38:54,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:38:55,138 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-19 08:38:55,138 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 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-19 08:38:55,156 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 18 treesize of output 16 [2022-11-19 08:38:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:55,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:38:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:56,433 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:38:56,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001734557] [2022-11-19 08:38:56,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001734557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:38:56,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1800551076] [2022-11-19 08:38:56,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:38:56,434 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:38:56,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:38:56,434 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:38:56,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (116)] Waiting until timeout for monitored process [2022-11-19 08:38:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:38:57,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:38:57,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:57,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:38:57,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:38:57,347 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:38:57,348 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 18 treesize of output 53 [2022-11-19 08:38:57,371 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 599 treesize of output 583 [2022-11-19 08:38:57,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:38:57,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:38:57,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1800551076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:38:57,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:38:57,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5, 5] total 11 [2022-11-19 08:38:57,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105099408] [2022-11-19 08:38:57,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:38:57,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:38:57,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:38:57,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:38:57,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:38:57,592 INFO L87 Difference]: Start difference. First operand 7769 states and 34605 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:57,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:38:57,745 INFO L93 Difference]: Finished difference Result 7771 states and 34613 transitions. [2022-11-19 08:38:57,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:38:57,745 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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 12 [2022-11-19 08:38:57,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:38:57,770 INFO L225 Difference]: With dead ends: 7771 [2022-11-19 08:38:57,770 INFO L226 Difference]: Without dead ends: 7771 [2022-11-19 08:38:57,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:38:57,770 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:38:57,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-11-19 08:38:57,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7771 states. [2022-11-19 08:38:57,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7771 to 7770. [2022-11-19 08:38:57,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7770 states, 7729 states have (on average 4.477940225126148) internal successors, (34610), 7769 states have internal predecessors, (34610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:57,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7770 states to 7770 states and 34610 transitions. [2022-11-19 08:38:57,933 INFO L78 Accepts]: Start accepts. Automaton has 7770 states and 34610 transitions. Word has length 12 [2022-11-19 08:38:57,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:38:57,934 INFO L495 AbstractCegarLoop]: Abstraction has 7770 states and 34610 transitions. [2022-11-19 08:38:57,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:38:57,934 INFO L276 IsEmpty]: Start isEmpty. Operand 7770 states and 34610 transitions. [2022-11-19 08:38:57,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:38:57,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:38:57,935 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-19 08:38:57,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (115)] Ended with exit code 0 [2022-11-19 08:38:58,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (116)] Ended with exit code 0 [2022-11-19 08:38:58,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:38:58,339 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:38:58,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:38:58,339 INFO L85 PathProgramCache]: Analyzing trace with hash -864142134, now seen corresponding path program 3 times [2022-11-19 08:38:58,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:38:58,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [681210198] [2022-11-19 08:38:58,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:38:58,339 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:38:58,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:38:58,340 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:38:58,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (117)] Waiting until timeout for monitored process [2022-11-19 08:38:58,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 08:38:58,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:38:58,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:38:58,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:38:59,049 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:38:59,049 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:38:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:38:59,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:39:02,380 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:39:02,380 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:39:02,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [681210198] [2022-11-19 08:39:02,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [681210198] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:39:02,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [365386263] [2022-11-19 08:39:02,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:39:02,381 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:39:02,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:39:02,383 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:39:02,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (118)] Waiting until timeout for monitored process [2022-11-19 08:39:03,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 08:39:03,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:39:03,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:39:03,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:03,854 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:39:03,854 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:39:04,034 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:39:04,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:39:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:39:04,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [365386263] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:39:04,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209655645] [2022-11-19 08:39:04,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:39:04,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:39:04,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:39:04,437 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:39:04,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-11-19 08:39:06,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 08:39:06,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:39:06,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:39:06,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:06,959 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:39:06,960 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:39:07,119 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:39:07,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:39:07,481 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:39:07,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209655645] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:39:07,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:39:07,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 22 [2022-11-19 08:39:07,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672305342] [2022-11-19 08:39:07,481 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:39:07,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 08:39:07,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:39:07,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 08:39:07,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-19 08:39:07,482 INFO L87 Difference]: Start difference. First operand 7770 states and 34610 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:36,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:39:36,189 INFO L93 Difference]: Finished difference Result 135179 states and 615100 transitions. [2022-11-19 08:39:36,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 08:39:36,190 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 08:39:36,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:39:37,642 INFO L225 Difference]: With dead ends: 135179 [2022-11-19 08:39:37,642 INFO L226 Difference]: Without dead ends: 135179 [2022-11-19 08:39:37,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 08:39:37,643 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 4584 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4666 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4584 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 4666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:39:37,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4584 Valid, 0 Invalid, 4688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 4666 Invalid, 0 Unknown, 0 Unchecked, 15.3s Time] [2022-11-19 08:39:38,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135179 states. [2022-11-19 08:39:39,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135179 to 7782. [2022-11-19 08:39:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7782 states, 7741 states have (on average 4.474098953623563) internal successors, (34634), 7781 states have internal predecessors, (34634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:39,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7782 states to 7782 states and 34634 transitions. [2022-11-19 08:39:39,721 INFO L78 Accepts]: Start accepts. Automaton has 7782 states and 34634 transitions. Word has length 12 [2022-11-19 08:39:39,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:39:39,721 INFO L495 AbstractCegarLoop]: Abstraction has 7782 states and 34634 transitions. [2022-11-19 08:39:39,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:39,721 INFO L276 IsEmpty]: Start isEmpty. Operand 7782 states and 34634 transitions. [2022-11-19 08:39:39,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:39:39,723 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:39:39,723 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:39:39,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-11-19 08:39:39,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (117)] Forceful destruction successful, exit code 0 [2022-11-19 08:39:40,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (118)] Forceful destruction successful, exit code 0 [2022-11-19 08:39:40,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:39:40,333 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:39:40,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:39:40,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1698309770, now seen corresponding path program 1 times [2022-11-19 08:39:40,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:39:40,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178940176] [2022-11-19 08:39:40,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:39:40,334 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:40,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:39:40,335 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:39:40,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2022-11-19 08:39:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:39:40,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:39:40,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:40,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:39:40,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:39:40,707 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:39:40,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178940176] [2022-11-19 08:39:40,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178940176] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:39:40,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:39:40,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:39:40,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465972323] [2022-11-19 08:39:40,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:39:40,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:39:40,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:39:40,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:39:40,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:39:40,708 INFO L87 Difference]: Start difference. First operand 7782 states and 34634 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) [2022-11-19 08:39:41,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:39:41,083 INFO L93 Difference]: Finished difference Result 7277 states and 32348 transitions. [2022-11-19 08:39:41,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:39:41,084 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 [2022-11-19 08:39:41,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:39:41,115 INFO L225 Difference]: With dead ends: 7277 [2022-11-19 08:39:41,115 INFO L226 Difference]: Without dead ends: 7277 [2022-11-19 08:39:41,115 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 [2022-11-19 08:39:41,116 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:39:41,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 0 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:39:41,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7277 states. [2022-11-19 08:39:41,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7277 to 7277. [2022-11-19 08:39:41,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7277 states, 7244 states have (on average 4.465488680287134) internal successors, (32348), 7276 states have internal predecessors, (32348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:41,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7277 states to 7277 states and 32348 transitions. [2022-11-19 08:39:41,314 INFO L78 Accepts]: Start accepts. Automaton has 7277 states and 32348 transitions. Word has length 13 [2022-11-19 08:39:41,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:39:41,314 INFO L495 AbstractCegarLoop]: Abstraction has 7277 states and 32348 transitions. [2022-11-19 08:39:41,314 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) [2022-11-19 08:39:41,314 INFO L276 IsEmpty]: Start isEmpty. Operand 7277 states and 32348 transitions. [2022-11-19 08:39:41,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:39:41,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:39:41,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:39:41,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (120)] Forceful destruction successful, exit code 0 [2022-11-19 08:39:41,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:41,516 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:39:41,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:39:41,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1698309771, now seen corresponding path program 1 times [2022-11-19 08:39:41,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:39:41,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [746494497] [2022-11-19 08:39:41,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:39:41,517 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:41,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:39:41,518 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:39:41,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (121)] Waiting until timeout for monitored process [2022-11-19 08:39:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:39:41,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:39:41,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:39:41,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:39:41,930 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:39:41,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [746494497] [2022-11-19 08:39:41,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [746494497] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:39:41,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:39:41,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:39:41,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918471244] [2022-11-19 08:39:41,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:39:41,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:39:41,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:39:41,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:39:41,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:39:41,932 INFO L87 Difference]: Start difference. First operand 7277 states and 32348 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) 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) [2022-11-19 08:39:42,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:39:42,328 INFO L93 Difference]: Finished difference Result 6772 states and 30062 transitions. [2022-11-19 08:39:42,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:39:42,329 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) 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 [2022-11-19 08:39:42,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:39:42,358 INFO L225 Difference]: With dead ends: 6772 [2022-11-19 08:39:42,359 INFO L226 Difference]: Without dead ends: 6772 [2022-11-19 08:39:42,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:39:42,359 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:39:42,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:39:42,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6772 states. [2022-11-19 08:39:42,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6772 to 6772. [2022-11-19 08:39:42,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6772 states, 6747 states have (on average 4.455609900696606) internal successors, (30062), 6771 states have internal predecessors, (30062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:42,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6772 states to 6772 states and 30062 transitions. [2022-11-19 08:39:42,482 INFO L78 Accepts]: Start accepts. Automaton has 6772 states and 30062 transitions. Word has length 13 [2022-11-19 08:39:42,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:39:42,482 INFO L495 AbstractCegarLoop]: Abstraction has 6772 states and 30062 transitions. [2022-11-19 08:39:42,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) 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) [2022-11-19 08:39:42,482 INFO L276 IsEmpty]: Start isEmpty. Operand 6772 states and 30062 transitions. [2022-11-19 08:39:42,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:39:42,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:39:42,483 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:39:42,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (121)] Ended with exit code 0 [2022-11-19 08:39:42,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:42,684 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:39:42,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:39:42,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1006347371, now seen corresponding path program 1 times [2022-11-19 08:39:42,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:39:42,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800017564] [2022-11-19 08:39:42,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:39:42,685 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:42,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:39:42,685 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:39:42,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Waiting until timeout for monitored process [2022-11-19 08:39:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:39:43,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:39:43,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:43,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:43,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:43,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:43,284 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-19 08:39:43,284 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 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-19 08:39:43,302 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 18 treesize of output 16 [2022-11-19 08:39:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:39:44,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:39:44,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:39:44,657 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:39:44,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800017564] [2022-11-19 08:39:44,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800017564] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:39:44,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1063957863] [2022-11-19 08:39:44,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:39:44,658 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:39:44,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:39:44,659 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:39:44,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (123)] Waiting until timeout for monitored process [2022-11-19 08:39:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:39:45,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:39:45,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:45,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:45,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:45,665 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:39:45,665 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 18 treesize of output 53 [2022-11-19 08:39:45,686 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 120 treesize of output 116 [2022-11-19 08:39:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:39:45,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:39:45,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1063957863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:39:45,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:39:45,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5, 5] total 11 [2022-11-19 08:39:45,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441533357] [2022-11-19 08:39:45,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:39:45,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:39:45,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:39:45,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:39:45,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:39:45,903 INFO L87 Difference]: Start difference. First operand 6772 states and 30062 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:46,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:39:46,025 INFO L93 Difference]: Finished difference Result 6764 states and 30024 transitions. [2022-11-19 08:39:46,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:39:46,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 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 13 [2022-11-19 08:39:46,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:39:46,045 INFO L225 Difference]: With dead ends: 6764 [2022-11-19 08:39:46,045 INFO L226 Difference]: Without dead ends: 6764 [2022-11-19 08:39:46,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:39:46,046 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:39:46,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-19 08:39:46,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6764 states. [2022-11-19 08:39:46,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6764 to 6757. [2022-11-19 08:39:46,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6757 states, 6732 states have (on average 4.455882352941177) internal successors, (29997), 6756 states have internal predecessors, (29997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:46,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6757 states to 6757 states and 29997 transitions. [2022-11-19 08:39:46,224 INFO L78 Accepts]: Start accepts. Automaton has 6757 states and 29997 transitions. Word has length 13 [2022-11-19 08:39:46,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:39:46,224 INFO L495 AbstractCegarLoop]: Abstraction has 6757 states and 29997 transitions. [2022-11-19 08:39:46,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:46,224 INFO L276 IsEmpty]: Start isEmpty. Operand 6757 states and 29997 transitions. [2022-11-19 08:39:46,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:39:46,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:39:46,225 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:39:46,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (123)] Forceful destruction successful, exit code 0 [2022-11-19 08:39:46,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Forceful destruction successful, exit code 0 [2022-11-19 08:39:46,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:46,626 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:39:46,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:39:46,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1006340210, now seen corresponding path program 1 times [2022-11-19 08:39:46,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:39:46,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722624768] [2022-11-19 08:39:46,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:39:46,627 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:46,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:39:46,627 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:39:46,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (124)] Waiting until timeout for monitored process [2022-11-19 08:39:47,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:39:47,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 08:39:47,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:47,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:47,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:47,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:47,241 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-19 08:39:47,241 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 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-19 08:39:47,265 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 18 treesize of output 16 [2022-11-19 08:39:47,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:39:47,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:39:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:39:48,598 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:39:48,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722624768] [2022-11-19 08:39:48,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722624768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:39:48,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1879737754] [2022-11-19 08:39:48,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:39:48,599 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:39:48,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:39:48,600 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:39:48,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (125)] Waiting until timeout for monitored process [2022-11-19 08:39:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:39:49,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:39:49,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:49,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:49,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:49,569 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:39:49,569 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 18 treesize of output 53 [2022-11-19 08:39:49,593 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 88 treesize of output 84 [2022-11-19 08:39:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:39:49,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:39:49,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1879737754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:39:49,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:39:49,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5, 5] total 11 [2022-11-19 08:39:49,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537825655] [2022-11-19 08:39:49,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:39:49,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:39:49,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:39:49,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:39:49,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:39:49,804 INFO L87 Difference]: Start difference. First operand 6757 states and 29997 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:49,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:39:49,947 INFO L93 Difference]: Finished difference Result 6764 states and 30019 transitions. [2022-11-19 08:39:49,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:39:49,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 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 13 [2022-11-19 08:39:49,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:39:49,973 INFO L225 Difference]: With dead ends: 6764 [2022-11-19 08:39:49,973 INFO L226 Difference]: Without dead ends: 6764 [2022-11-19 08:39:49,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:39:49,973 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:39:49,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-19 08:39:49,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6764 states. [2022-11-19 08:39:50,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6764 to 6762. [2022-11-19 08:39:50,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6762 states, 6737 states have (on average 4.455098708624017) internal successors, (30014), 6761 states have internal predecessors, (30014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:50,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6762 states to 6762 states and 30014 transitions. [2022-11-19 08:39:50,152 INFO L78 Accepts]: Start accepts. Automaton has 6762 states and 30014 transitions. Word has length 13 [2022-11-19 08:39:50,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:39:50,152 INFO L495 AbstractCegarLoop]: Abstraction has 6762 states and 30014 transitions. [2022-11-19 08:39:50,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:50,152 INFO L276 IsEmpty]: Start isEmpty. Operand 6762 states and 30014 transitions. [2022-11-19 08:39:50,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:39:50,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:39:50,153 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:39:50,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (125)] Ended with exit code 0 [2022-11-19 08:39:50,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (124)] Ended with exit code 0 [2022-11-19 08:39:50,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:50,554 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:39:50,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:39:50,555 INFO L85 PathProgramCache]: Analyzing trace with hash 529397616, now seen corresponding path program 1 times [2022-11-19 08:39:50,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:39:50,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273748363] [2022-11-19 08:39:50,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:39:50,555 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:50,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:39:50,556 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:39:50,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (126)] Waiting until timeout for monitored process [2022-11-19 08:39:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:39:51,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 08:39:51,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:51,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:51,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:51,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:51,184 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-19 08:39:51,184 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 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-19 08:39:51,202 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 18 treesize of output 16 [2022-11-19 08:39:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:39:51,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:39:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:39:52,570 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:39:52,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273748363] [2022-11-19 08:39:52,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273748363] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:39:52,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1701092408] [2022-11-19 08:39:52,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:39:52,571 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:39:52,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:39:52,572 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:39:52,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (127)] Waiting until timeout for monitored process [2022-11-19 08:39:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:39:53,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:39:53,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:53,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:53,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:53,588 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:39:53,588 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 18 treesize of output 53 [2022-11-19 08:39:53,610 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 [2022-11-19 08:39:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:39:53,830 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:39:53,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1701092408] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:39:53,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:39:53,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5, 5] total 11 [2022-11-19 08:39:53,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346672888] [2022-11-19 08:39:53,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:39:53,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:39:53,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:39:53,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:39:53,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:39:53,832 INFO L87 Difference]: Start difference. First operand 6762 states and 30014 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:53,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:39:53,972 INFO L93 Difference]: Finished difference Result 6768 states and 30033 transitions. [2022-11-19 08:39:53,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:39:53,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 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 13 [2022-11-19 08:39:53,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:39:53,992 INFO L225 Difference]: With dead ends: 6768 [2022-11-19 08:39:53,992 INFO L226 Difference]: Without dead ends: 6768 [2022-11-19 08:39:53,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:39:53,993 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:39:53,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-11-19 08:39:54,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6768 states. [2022-11-19 08:39:54,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6768 to 6766. [2022-11-19 08:39:54,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6766 states, 6741 states have (on average 4.45453196855066) internal successors, (30028), 6765 states have internal predecessors, (30028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:54,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6766 states to 6766 states and 30028 transitions. [2022-11-19 08:39:54,113 INFO L78 Accepts]: Start accepts. Automaton has 6766 states and 30028 transitions. Word has length 13 [2022-11-19 08:39:54,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:39:54,113 INFO L495 AbstractCegarLoop]: Abstraction has 6766 states and 30028 transitions. [2022-11-19 08:39:54,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:54,114 INFO L276 IsEmpty]: Start isEmpty. Operand 6766 states and 30028 transitions. [2022-11-19 08:39:54,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:39:54,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:39:54,115 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:39:54,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (126)] Forceful destruction successful, exit code 0 [2022-11-19 08:39:54,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (127)] Ended with exit code 0 [2022-11-19 08:39:54,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:39:54,515 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:39:54,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:39:54,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1131996207, now seen corresponding path program 1 times [2022-11-19 08:39:54,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:39:54,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1203660372] [2022-11-19 08:39:54,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:39:54,516 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:54,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:39:54,517 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:39:54,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (128)] Waiting until timeout for monitored process [2022-11-19 08:39:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:39:54,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:39:54,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:54,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:54,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:54,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:55,151 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-19 08:39:55,151 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 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-19 08:39:55,169 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 18 treesize of output 16 [2022-11-19 08:39:55,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:39:55,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:39:56,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:39:56,567 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:39:56,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1203660372] [2022-11-19 08:39:56,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1203660372] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:39:56,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [463156452] [2022-11-19 08:39:56,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:39:56,568 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:39:56,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:39:56,571 INFO L229 MonitoredProcess]: Starting monitored process 129 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:39:56,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (129)] Waiting until timeout for monitored process [2022-11-19 08:39:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:39:57,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:39:57,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:57,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:57,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:57,639 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:39:57,639 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 18 treesize of output 53 [2022-11-19 08:39:57,661 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 [2022-11-19 08:39:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:39:57,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:39:57,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [463156452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:39:57,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:39:57,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5, 5] total 11 [2022-11-19 08:39:57,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746674363] [2022-11-19 08:39:57,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:39:57,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:39:57,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:39:57,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:39:57,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:39:57,858 INFO L87 Difference]: Start difference. First operand 6766 states and 30028 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:57,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:39:57,981 INFO L93 Difference]: Finished difference Result 6761 states and 30014 transitions. [2022-11-19 08:39:57,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:39:57,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 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 14 [2022-11-19 08:39:57,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:39:58,001 INFO L225 Difference]: With dead ends: 6761 [2022-11-19 08:39:58,002 INFO L226 Difference]: Without dead ends: 6761 [2022-11-19 08:39:58,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:39:58,002 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:39:58,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-19 08:39:58,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6761 states. [2022-11-19 08:39:58,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6761 to 6756. [2022-11-19 08:39:58,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6756 states, 6731 states have (on average 4.456692913385827) internal successors, (29998), 6755 states have internal predecessors, (29998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:58,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6756 states to 6756 states and 29998 transitions. [2022-11-19 08:39:58,121 INFO L78 Accepts]: Start accepts. Automaton has 6756 states and 29998 transitions. Word has length 14 [2022-11-19 08:39:58,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:39:58,121 INFO L495 AbstractCegarLoop]: Abstraction has 6756 states and 29998 transitions. [2022-11-19 08:39:58,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:39:58,121 INFO L276 IsEmpty]: Start isEmpty. Operand 6756 states and 29998 transitions. [2022-11-19 08:39:58,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:39:58,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:39:58,122 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:39:58,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (129)] Forceful destruction successful, exit code 0 [2022-11-19 08:39:58,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (128)] Forceful destruction successful, exit code 0 [2022-11-19 08:39:58,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:58,523 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:39:58,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:39:58,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1131996176, now seen corresponding path program 1 times [2022-11-19 08:39:58,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:39:58,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300954713] [2022-11-19 08:39:58,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:39:58,524 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:39:58,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:39:58,524 INFO L229 MonitoredProcess]: Starting monitored process 130 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:39:58,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (130)] Waiting until timeout for monitored process [2022-11-19 08:39:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:39:58,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:39:58,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:39:58,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:58,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:58,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:39:59,147 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-19 08:39:59,147 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 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-19 08:39:59,171 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 18 treesize of output 16 [2022-11-19 08:39:59,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:39:59,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:40:00,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:40:00,548 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:40:00,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300954713] [2022-11-19 08:40:00,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300954713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:40:00,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [869043420] [2022-11-19 08:40:00,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:40:00,548 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:40:00,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:40:00,549 INFO L229 MonitoredProcess]: Starting monitored process 131 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:40:00,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (131)] Waiting until timeout for monitored process [2022-11-19 08:40:01,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:40:01,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:40:01,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:40:01,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:40:01,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:40:01,524 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:40:01,525 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 18 treesize of output 53 [2022-11-19 08:40:01,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 58 [2022-11-19 08:40:01,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 08:40:01,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:40:01,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [869043420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:40:01,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:40:01,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5, 5] total 11 [2022-11-19 08:40:01,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427686124] [2022-11-19 08:40:01,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:40:01,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:40:01,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:40:01,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:40:01,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:40:01,785 INFO L87 Difference]: Start difference. First operand 6756 states and 29998 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:40:01,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:40:01,910 INFO L93 Difference]: Finished difference Result 6751 states and 29984 transitions. [2022-11-19 08:40:01,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:40:01,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 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 14 [2022-11-19 08:40:01,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:40:01,944 INFO L225 Difference]: With dead ends: 6751 [2022-11-19 08:40:01,944 INFO L226 Difference]: Without dead ends: 6751 [2022-11-19 08:40:01,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:40:01,945 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:40:01,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-19 08:40:01,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6751 states. [2022-11-19 08:40:02,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6751 to 6745. [2022-11-19 08:40:02,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6745 states, 6720 states have (on average 4.459077380952381) internal successors, (29965), 6744 states have internal predecessors, (29965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:40:02,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6745 states to 6745 states and 29965 transitions. [2022-11-19 08:40:02,073 INFO L78 Accepts]: Start accepts. Automaton has 6745 states and 29965 transitions. Word has length 14 [2022-11-19 08:40:02,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:40:02,074 INFO L495 AbstractCegarLoop]: Abstraction has 6745 states and 29965 transitions. [2022-11-19 08:40:02,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:40:02,074 INFO L276 IsEmpty]: Start isEmpty. Operand 6745 states and 29965 transitions. [2022-11-19 08:40:02,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 08:40:02,076 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:40:02,076 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1] [2022-11-19 08:40:02,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (131)] Forceful destruction successful, exit code 0 [2022-11-19 08:40:02,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (130)] Ended with exit code 0 [2022-11-19 08:40:02,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,130 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:40:02,477 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:40:02,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:40:02,477 INFO L85 PathProgramCache]: Analyzing trace with hash 995426378, now seen corresponding path program 2 times [2022-11-19 08:40:02,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:40:02,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [811947144] [2022-11-19 08:40:02,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:40:02,478 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:40:02,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:40:02,479 INFO L229 MonitoredProcess]: Starting monitored process 132 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:40:02,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (132)] Waiting until timeout for monitored process [2022-11-19 08:40:02,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:40:02,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:40:02,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 08:40:02,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:40:03,092 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:40:03,093 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:40:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:40:03,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:40:05,040 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:40:05,040 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:40:05,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [811947144] [2022-11-19 08:40:05,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [811947144] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:40:05,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1453330159] [2022-11-19 08:40:05,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:40:05,040 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:40:05,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:40:05,041 INFO L229 MonitoredProcess]: Starting monitored process 133 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:40:05,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (133)] Waiting until timeout for monitored process [2022-11-19 08:40:05,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:40:05,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:40:05,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:40:05,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:40:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:40:06,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:40:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:40:08,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1453330159] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:40:08,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490820222] [2022-11-19 08:40:08,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:40:08,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:40:08,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:40:08,244 INFO L229 MonitoredProcess]: Starting monitored process 134 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:40:08,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-11-19 08:40:08,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:40:08,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:40:08,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:40:08,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:40:08,932 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:40:08,932 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:40:09,949 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:40:09,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:40:11,489 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:40:11,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490820222] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:40:11,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:40:11,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9, 9, 8, 8] total 49 [2022-11-19 08:40:11,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203064000] [2022-11-19 08:40:11,490 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:40:11,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-19 08:40:11,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:40:11,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-19 08:40:11,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2229, Unknown=0, NotChecked=0, Total=2450 [2022-11-19 08:40:11,491 INFO L87 Difference]: Start difference. First operand 6745 states and 29965 transitions. Second operand has 50 states, 50 states have (on average 1.62) internal successors, (81), 49 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:40:23,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:40:57,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:40:57,268 INFO L93 Difference]: Finished difference Result 20838 states and 86758 transitions. [2022-11-19 08:40:57,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-19 08:40:57,270 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.62) internal successors, (81), 49 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-19 08:40:57,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:40:57,349 INFO L225 Difference]: With dead ends: 20838 [2022-11-19 08:40:57,349 INFO L226 Difference]: Without dead ends: 20838 [2022-11-19 08:40:57,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1119 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=850, Invalid=5312, Unknown=0, NotChecked=0, Total=6162 [2022-11-19 08:40:57,350 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2877 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5808 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2877 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 5808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1248 IncrementalHoareTripleChecker+Unchecked, 32.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:40:57,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2877 Valid, 0 Invalid, 7179 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [123 Valid, 5808 Invalid, 0 Unknown, 1248 Unchecked, 32.9s Time] [2022-11-19 08:40:57,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20838 states. [2022-11-19 08:40:57,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20838 to 16192. [2022-11-19 08:40:57,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16192 states, 16167 states have (on average 4.5652254592688815) internal successors, (73806), 16191 states have internal predecessors, (73806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:40:57,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16192 states to 16192 states and 73806 transitions. [2022-11-19 08:40:57,826 INFO L78 Accepts]: Start accepts. Automaton has 16192 states and 73806 transitions. Word has length 15 [2022-11-19 08:40:57,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:40:57,826 INFO L495 AbstractCegarLoop]: Abstraction has 16192 states and 73806 transitions. [2022-11-19 08:40:57,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.62) internal successors, (81), 49 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:40:57,826 INFO L276 IsEmpty]: Start isEmpty. Operand 16192 states and 73806 transitions. [2022-11-19 08:40:57,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 08:40:57,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:40:57,828 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:40:57,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-11-19 08:40:58,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (133)] Forceful destruction successful, exit code 0 [2022-11-19 08:40:58,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (132)] Ended with exit code 0 [2022-11-19 08:40:58,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,133 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,132 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:40:58,429 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:40:58,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:40:58,429 INFO L85 PathProgramCache]: Analyzing trace with hash -732142796, now seen corresponding path program 1 times [2022-11-19 08:40:58,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:40:58,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [771423276] [2022-11-19 08:40:58,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:40:58,430 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:40:58,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:40:58,435 INFO L229 MonitoredProcess]: Starting monitored process 135 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:40:58,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (135)] Waiting until timeout for monitored process [2022-11-19 08:40:58,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:40:58,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:40:58,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:40:58,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:40:58,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:40:58,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:40:59,101 INFO L321 Elim1Store]: treesize reduction 90, result has 33.8 percent of original size [2022-11-19 08:40:59,101 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 4 case distinctions, treesize of input 20 treesize of output 53 [2022-11-19 08:40:59,118 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 18 treesize of output 16 [2022-11-19 08:40:59,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:40:59,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:41:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:41:00,496 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:41:00,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [771423276] [2022-11-19 08:41:00,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [771423276] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:41:00,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [563323235] [2022-11-19 08:41:00,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:41:00,497 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:41:00,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:41:00,498 INFO L229 MonitoredProcess]: Starting monitored process 136 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:41:00,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (136)] Waiting until timeout for monitored process [2022-11-19 08:41:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:41:01,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:41:01,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:41:01,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:41:01,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:41:01,569 INFO L321 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2022-11-19 08:41:01,570 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 18 treesize of output 53 [2022-11-19 08:41:01,593 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 [2022-11-19 08:41:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 08:41:01,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:41:01,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [563323235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:41:01,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:41:01,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5, 5] total 11 [2022-11-19 08:41:01,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72704985] [2022-11-19 08:41:01,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:41:01,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:41:01,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:41:01,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:41:01,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:41:01,880 INFO L87 Difference]: Start difference. First operand 16192 states and 73806 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 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) [2022-11-19 08:41:02,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:41:02,205 INFO L93 Difference]: Finished difference Result 16191 states and 73805 transitions. [2022-11-19 08:41:02,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:41:02,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 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 15 [2022-11-19 08:41:02,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:41:02,262 INFO L225 Difference]: With dead ends: 16191 [2022-11-19 08:41:02,262 INFO L226 Difference]: Without dead ends: 16191 [2022-11-19 08:41:02,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:41:02,262 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:41:02,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-19 08:41:02,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16191 states. [2022-11-19 08:41:02,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16191 to 16139. [2022-11-19 08:41:02,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16139 states, 16115 states have (on average 4.569655600372324) internal successors, (73640), 16138 states have internal predecessors, (73640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:41:02,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16139 states to 16139 states and 73640 transitions. [2022-11-19 08:41:02,613 INFO L78 Accepts]: Start accepts. Automaton has 16139 states and 73640 transitions. Word has length 15 [2022-11-19 08:41:02,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:41:02,613 INFO L495 AbstractCegarLoop]: Abstraction has 16139 states and 73640 transitions. [2022-11-19 08:41:02,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 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) [2022-11-19 08:41:02,613 INFO L276 IsEmpty]: Start isEmpty. Operand 16139 states and 73640 transitions. [2022-11-19 08:41:02,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 08:41:02,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:41:02,615 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:41:02,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (136)] Ended with exit code 0 [2022-11-19 08:41:02,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (135)] Ended with exit code 0 [2022-11-19 08:41:03,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,135 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:41:03,016 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:41:03,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:41:03,017 INFO L85 PathProgramCache]: Analyzing trace with hash -991783678, now seen corresponding path program 1 times [2022-11-19 08:41:03,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:41:03,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [421037964] [2022-11-19 08:41:03,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:41:03,017 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:41:03,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:41:03,018 INFO L229 MonitoredProcess]: Starting monitored process 137 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:41:03,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (137)] Waiting until timeout for monitored process [2022-11-19 08:41:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:41:03,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:41:03,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:41:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:41:03,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:41:03,448 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:41:03,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [421037964] [2022-11-19 08:41:03,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [421037964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:41:03,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:41:03,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:41:03,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582877536] [2022-11-19 08:41:03,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:41:03,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:41:03,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:41:03,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:41:03,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:41:03,449 INFO L87 Difference]: Start difference. First operand 16139 states and 73640 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2022-11-19 08:41:03,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:41:03,713 INFO L93 Difference]: Finished difference Result 16076 states and 73444 transitions. [2022-11-19 08:41:03,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:41:03,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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 [2022-11-19 08:41:03,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:41:03,957 INFO L225 Difference]: With dead ends: 16076 [2022-11-19 08:41:03,957 INFO L226 Difference]: Without dead ends: 15969 [2022-11-19 08:41:03,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:41:03,957 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:41:03,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 0 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:41:03,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15969 states. [2022-11-19 08:41:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15969 to 15951. [2022-11-19 08:41:04,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15951 states, 15934 states have (on average 4.568909250658968) internal successors, (72801), 15950 states have internal predecessors, (72801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:41:04,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15951 states to 15951 states and 72801 transitions. [2022-11-19 08:41:04,270 INFO L78 Accepts]: Start accepts. Automaton has 15951 states and 72801 transitions. Word has length 16 [2022-11-19 08:41:04,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:41:04,270 INFO L495 AbstractCegarLoop]: Abstraction has 15951 states and 72801 transitions. [2022-11-19 08:41:04,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2022-11-19 08:41:04,270 INFO L276 IsEmpty]: Start isEmpty. Operand 15951 states and 72801 transitions. [2022-11-19 08:41:04,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 08:41:04,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:41:04,272 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:41:04,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (137)] Ended with exit code 0 [2022-11-19 08:41:04,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:41:04,473 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:41:04,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:41:04,473 INFO L85 PathProgramCache]: Analyzing trace with hash -2033228997, now seen corresponding path program 1 times [2022-11-19 08:41:04,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:41:04,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649363687] [2022-11-19 08:41:04,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:41:04,474 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:41:04,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:41:04,475 INFO L229 MonitoredProcess]: Starting monitored process 138 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:41:04,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (138)] Waiting until timeout for monitored process [2022-11-19 08:41:04,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:41:04,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 08:41:04,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:41:05,101 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:41:05,101 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:41:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:41:05,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:41:07,285 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:41:07,285 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:41:07,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649363687] [2022-11-19 08:41:07,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649363687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:41:07,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1376339642] [2022-11-19 08:41:07,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:41:07,286 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:41:07,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:41:07,287 INFO L229 MonitoredProcess]: Starting monitored process 139 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:41:07,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (139)] Waiting until timeout for monitored process [2022-11-19 08:41:08,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:41:08,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 08:41:08,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:41:08,264 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:41:08,265 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:41:09,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:41:09,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:41:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:41:12,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1376339642] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:41:12,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137494633] [2022-11-19 08:41:12,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:41:12,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:41:12,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:41:12,267 INFO L229 MonitoredProcess]: Starting monitored process 140 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:41:12,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-11-19 08:41:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:41:12,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:41:12,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:41:12,927 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:41:12,927 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:41:13,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:41:13,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:41:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:41:15,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137494633] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:41:15,104 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:41:15,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9, 8, 8] total 41 [2022-11-19 08:41:15,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920169168] [2022-11-19 08:41:15,105 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:41:15,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-19 08:41:15,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:41:15,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-19 08:41:15,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1493, Unknown=0, NotChecked=0, Total=1722 [2022-11-19 08:41:15,106 INFO L87 Difference]: Start difference. First operand 15951 states and 72801 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:41:19,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:41:20,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:41:23,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:41:26,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:41:32,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:41:33,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:41:36,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:41:38,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:41:39,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:41:41,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:41:42,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:41:44,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:41:46,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:41:49,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:41:50,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:41:52,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:41:54,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:42:05,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:42:05,496 INFO L93 Difference]: Finished difference Result 19953 states and 85552 transitions. [2022-11-19 08:42:05,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-19 08:42:05,498 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-19 08:42:05,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:42:05,571 INFO L225 Difference]: With dead ends: 19953 [2022-11-19 08:42:05,571 INFO L226 Difference]: Without dead ends: 19869 [2022-11-19 08:42:05,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=574, Invalid=2732, Unknown=0, NotChecked=0, Total=3306 [2022-11-19 08:42:05,571 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1410 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2682 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1410 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 2682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1148 IncrementalHoareTripleChecker+Unchecked, 43.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:42:05,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1410 Valid, 0 Invalid, 3886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 2682 Invalid, 0 Unknown, 1148 Unchecked, 43.9s Time] [2022-11-19 08:42:05,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19869 states. [2022-11-19 08:42:05,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19869 to 14766. [2022-11-19 08:42:05,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14766 states, 14749 states have (on average 4.5712929690148485) internal successors, (67422), 14765 states have internal predecessors, (67422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:05,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14766 states to 14766 states and 67422 transitions. [2022-11-19 08:42:05,890 INFO L78 Accepts]: Start accepts. Automaton has 14766 states and 67422 transitions. Word has length 16 [2022-11-19 08:42:05,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:42:05,891 INFO L495 AbstractCegarLoop]: Abstraction has 14766 states and 67422 transitions. [2022-11-19 08:42:05,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:05,891 INFO L276 IsEmpty]: Start isEmpty. Operand 14766 states and 67422 transitions. [2022-11-19 08:42:05,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 08:42:05,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:42:05,893 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-19 08:42:05,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (138)] Forceful destruction successful, exit code 0 [2022-11-19 08:42:06,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (139)] Ended with exit code 0 [2022-11-19 08:42:06,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-11-19 08:42:06,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,139 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,140 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:42:06,494 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:42:06,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:42:06,495 INFO L85 PathProgramCache]: Analyzing trace with hash -445734053, now seen corresponding path program 1 times [2022-11-19 08:42:06,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:42:06,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937167195] [2022-11-19 08:42:06,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:42:06,495 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:42:06,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:42:06,496 INFO L229 MonitoredProcess]: Starting monitored process 141 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:42:06,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (141)] Waiting until timeout for monitored process [2022-11-19 08:42:06,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:42:06,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 08:42:06,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:42:07,119 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:42:07,120 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:42:07,469 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:42:07,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:42:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:42:09,166 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:42:09,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937167195] [2022-11-19 08:42:09,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937167195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:42:09,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2145085056] [2022-11-19 08:42:09,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:42:09,166 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:42:09,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:42:09,167 INFO L229 MonitoredProcess]: Starting monitored process 142 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:42:09,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (142)] Waiting until timeout for monitored process [2022-11-19 08:42:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:42:09,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 08:42:09,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:42:10,190 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:42:10,190 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:42:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:42:11,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:42:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:42:14,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2145085056] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:42:14,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887764621] [2022-11-19 08:42:14,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:42:14,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:42:14,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:42:14,262 INFO L229 MonitoredProcess]: Starting monitored process 143 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:42:14,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-11-19 08:42:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:42:14,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:42:14,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:42:14,965 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:42:14,965 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:42:15,424 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:42:15,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:42:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:42:16,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887764621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:42:16,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:42:16,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9, 8, 8] total 41 [2022-11-19 08:42:16,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028441753] [2022-11-19 08:42:16,971 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:42:16,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-19 08:42:16,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:42:16,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-19 08:42:16,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1493, Unknown=0, NotChecked=0, Total=1722 [2022-11-19 08:42:16,972 INFO L87 Difference]: Start difference. First operand 14766 states and 67422 transitions. Second operand has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 41 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:42:20,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:42:24,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:42:26,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:42:29,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:42:36,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:42:39,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:42:42,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:42:43,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:42:49,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:43:05,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:43:05,347 INFO L93 Difference]: Finished difference Result 26580 states and 116900 transitions. [2022-11-19 08:43:05,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-19 08:43:05,350 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 41 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-19 08:43:05,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:43:05,441 INFO L225 Difference]: With dead ends: 26580 [2022-11-19 08:43:05,441 INFO L226 Difference]: Without dead ends: 26580 [2022-11-19 08:43:05,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=571, Invalid=2969, Unknown=0, NotChecked=0, Total=3540 [2022-11-19 08:43:05,442 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1116 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3182 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 3182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 716 IncrementalHoareTripleChecker+Unchecked, 36.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:43:05,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1116 Valid, 0 Invalid, 3937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 3182 Invalid, 0 Unknown, 716 Unchecked, 36.1s Time] [2022-11-19 08:43:05,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26580 states. [2022-11-19 08:43:05,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26580 to 14778. [2022-11-19 08:43:05,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14778 states, 14761 states have (on average 4.5703543120384795) internal successors, (67463), 14777 states have internal predecessors, (67463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:43:05,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14778 states to 14778 states and 67463 transitions. [2022-11-19 08:43:05,824 INFO L78 Accepts]: Start accepts. Automaton has 14778 states and 67463 transitions. Word has length 16 [2022-11-19 08:43:05,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:43:05,824 INFO L495 AbstractCegarLoop]: Abstraction has 14778 states and 67463 transitions. [2022-11-19 08:43:05,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 41 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:43:05,825 INFO L276 IsEmpty]: Start isEmpty. Operand 14778 states and 67463 transitions. [2022-11-19 08:43:05,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 08:43:05,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:43:05,827 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:43:05,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (141)] Ended with exit code 0 [2022-11-19 08:43:06,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (142)] Ended with exit code 0 [2022-11-19 08:43:06,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-11-19 08:43:06,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,142 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,143 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:43:06,428 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:43:06,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:43:06,429 INFO L85 PathProgramCache]: Analyzing trace with hash -446375635, now seen corresponding path program 1 times [2022-11-19 08:43:06,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:43:06,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1158889252] [2022-11-19 08:43:06,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:43:06,429 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:43:06,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:43:06,430 INFO L229 MonitoredProcess]: Starting monitored process 144 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:43:06,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (144)] Waiting until timeout for monitored process [2022-11-19 08:43:06,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:43:06,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 08:43:06,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:43:07,208 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:43:07,208 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:43:07,564 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:43:07,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:43:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:43:09,138 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:43:09,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1158889252] [2022-11-19 08:43:09,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1158889252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:43:09,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1733184531] [2022-11-19 08:43:09,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:43:09,138 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:43:09,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:43:09,139 INFO L229 MonitoredProcess]: Starting monitored process 145 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:43:09,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (145)] Waiting until timeout for monitored process [2022-11-19 08:43:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:43:09,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 08:43:09,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:43:10,163 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:43:10,163 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:43:11,011 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:43:11,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:43:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:43:14,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1733184531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:43:14,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25957703] [2022-11-19 08:43:14,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:43:14,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:43:14,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:43:14,279 INFO L229 MonitoredProcess]: Starting monitored process 146 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:43:14,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-11-19 08:43:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:43:14,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:43:14,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:43:14,973 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:43:14,974 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:43:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:43:15,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:43:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:43:17,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25957703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:43:17,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:43:17,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 9, 8, 8] total 41 [2022-11-19 08:43:17,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626244579] [2022-11-19 08:43:17,045 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:43:17,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-19 08:43:17,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:43:17,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-19 08:43:17,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1493, Unknown=0, NotChecked=0, Total=1722 [2022-11-19 08:43:17,046 INFO L87 Difference]: Start difference. First operand 14778 states and 67463 transitions. Second operand has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:43:22,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:43:26,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:43:28,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:43:30,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:43:31,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:43:35,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:43:36,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:43:38,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:43:41,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:43:43,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:43:47,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:43:51,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:43:56,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:43:57,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:44:08,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:44:08,198 INFO L93 Difference]: Finished difference Result 27598 states and 120248 transitions. [2022-11-19 08:44:08,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 08:44:08,200 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-19 08:44:08,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:44:08,299 INFO L225 Difference]: With dead ends: 27598 [2022-11-19 08:44:08,299 INFO L226 Difference]: Without dead ends: 27550 [2022-11-19 08:44:08,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=455, Invalid=2407, Unknown=0, NotChecked=0, Total=2862 [2022-11-19 08:44:08,300 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1287 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3131 mSolverCounterSat, 46 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1287 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 3131 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 1299 IncrementalHoareTripleChecker+Unchecked, 43.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:44:08,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1287 Valid, 0 Invalid, 4478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 3131 Invalid, 2 Unknown, 1299 Unchecked, 43.2s Time] [2022-11-19 08:44:08,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27550 states. [2022-11-19 08:44:08,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27550 to 14768. [2022-11-19 08:44:08,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14768 states, 14751 states have (on average 4.571215510812826) internal successors, (67430), 14767 states have internal predecessors, (67430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:44:08,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14768 states to 14768 states and 67430 transitions. [2022-11-19 08:44:08,787 INFO L78 Accepts]: Start accepts. Automaton has 14768 states and 67430 transitions. Word has length 16 [2022-11-19 08:44:08,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:44:08,787 INFO L495 AbstractCegarLoop]: Abstraction has 14768 states and 67430 transitions. [2022-11-19 08:44:08,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 41 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:44:08,787 INFO L276 IsEmpty]: Start isEmpty. Operand 14768 states and 67430 transitions. [2022-11-19 08:44:08,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 08:44:08,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:44:08,790 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:44:08,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (145)] Forceful destruction successful, exit code 0 [2022-11-19 08:44:08,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (144)] Ended with exit code 0 [2022-11-19 08:44:09,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-11-19 08:44:09,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,144 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,146 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:44:09,391 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:44:09,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:44:09,392 INFO L85 PathProgramCache]: Analyzing trace with hash -121219927, now seen corresponding path program 2 times [2022-11-19 08:44:09,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:44:09,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383442601] [2022-11-19 08:44:09,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:44:09,392 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:44:09,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:44:09,393 INFO L229 MonitoredProcess]: Starting monitored process 147 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:44:09,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (147)] Waiting until timeout for monitored process [2022-11-19 08:44:09,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:44:09,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:44:09,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 08:44:09,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:44:10,062 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:44:10,062 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:44:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:44:10,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:44:11,927 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:44:11,927 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:44:11,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383442601] [2022-11-19 08:44:11,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383442601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:44:11,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1489611974] [2022-11-19 08:44:11,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:44:11,928 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:44:11,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:44:11,929 INFO L229 MonitoredProcess]: Starting monitored process 148 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:44:11,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (148)] Waiting until timeout for monitored process [2022-11-19 08:44:12,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:44:12,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:44:12,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 08:44:12,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:44:13,055 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:44:13,056 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:44:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:44:13,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:44:14,223 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:44:14,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1489611974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:44:14,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121088709] [2022-11-19 08:44:14,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:44:14,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:44:14,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:44:14,224 INFO L229 MonitoredProcess]: Starting monitored process 149 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:44:14,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-11-19 08:44:14,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:44:14,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:44:14,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:44:14,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:44:14,976 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:44:14,977 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:44:15,704 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:44:15,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:44:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:44:15,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121088709] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:44:15,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:44:15,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8, 8, 8, 8] total 32 [2022-11-19 08:44:15,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058515522] [2022-11-19 08:44:15,917 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:44:15,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-19 08:44:15,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:44:15,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-19 08:44:15,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 08:44:15,918 INFO L87 Difference]: Start difference. First operand 14768 states and 67430 transitions. Second operand has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:44:18,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:44:21,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:44:23,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:44:29,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:44:35,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:44:35,919 INFO L93 Difference]: Finished difference Result 25771 states and 115203 transitions. [2022-11-19 08:44:35,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 08:44:35,921 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-19 08:44:35,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:44:36,012 INFO L225 Difference]: With dead ends: 25771 [2022-11-19 08:44:36,012 INFO L226 Difference]: Without dead ends: 25751 [2022-11-19 08:44:36,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=275, Invalid=1531, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 08:44:36,013 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 909 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1957 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 570 IncrementalHoareTripleChecker+Unchecked, 17.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:44:36,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 0 Invalid, 2562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1957 Invalid, 0 Unknown, 570 Unchecked, 17.9s Time] [2022-11-19 08:44:36,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25751 states. [2022-11-19 08:44:36,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25751 to 16372. [2022-11-19 08:44:36,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16372 states, 16355 states have (on average 4.554264750840722) internal successors, (74485), 16371 states have internal predecessors, (74485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:44:36,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16372 states to 16372 states and 74485 transitions. [2022-11-19 08:44:36,549 INFO L78 Accepts]: Start accepts. Automaton has 16372 states and 74485 transitions. Word has length 16 [2022-11-19 08:44:36,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:44:36,550 INFO L495 AbstractCegarLoop]: Abstraction has 16372 states and 74485 transitions. [2022-11-19 08:44:36,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:44:36,550 INFO L276 IsEmpty]: Start isEmpty. Operand 16372 states and 74485 transitions. [2022-11-19 08:44:36,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 08:44:36,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:44:36,553 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:44:36,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (147)] Forceful destruction successful, exit code 0 [2022-11-19 08:44:36,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (148)] Forceful destruction successful, exit code 0 [2022-11-19 08:44:36,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-11-19 08:44:37,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,148 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,149 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:44:37,154 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:44:37,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:44:37,155 INFO L85 PathProgramCache]: Analyzing trace with hash -287944183, now seen corresponding path program 2 times [2022-11-19 08:44:37,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:44:37,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828786291] [2022-11-19 08:44:37,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:44:37,155 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:44:37,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:44:37,156 INFO L229 MonitoredProcess]: Starting monitored process 150 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:44:37,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (150)] Waiting until timeout for monitored process [2022-11-19 08:44:37,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:44:37,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:44:37,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 08:44:37,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:44:37,827 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:44:37,827 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:44:38,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:44:38,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:44:39,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:44:39,828 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:44:39,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828786291] [2022-11-19 08:44:39,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828786291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:44:39,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [526437863] [2022-11-19 08:44:39,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:44:39,828 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:44:39,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:44:39,830 INFO L229 MonitoredProcess]: Starting monitored process 151 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:44:39,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (151)] Waiting until timeout for monitored process [2022-11-19 08:44:40,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:44:40,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:44:40,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 08:44:40,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:44:41,891 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:44:41,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:44:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:44:43,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [526437863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:44:43,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215398819] [2022-11-19 08:44:43,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:44:43,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:44:43,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:44:43,319 INFO L229 MonitoredProcess]: Starting monitored process 152 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:44:43,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-11-19 08:44:43,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:44:43,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:44:43,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 08:44:43,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:44:44,079 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:44:44,080 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:44:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:44:45,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:44:46,695 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:44:46,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215398819] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:44:46,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:44:46,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9, 9, 8, 8] total 49 [2022-11-19 08:44:46,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831151633] [2022-11-19 08:44:46,696 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:44:46,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-19 08:44:46,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:44:46,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-19 08:44:46,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2229, Unknown=0, NotChecked=0, Total=2450 [2022-11-19 08:44:46,697 INFO L87 Difference]: Start difference. First operand 16372 states and 74485 transitions. Second operand has 50 states, 50 states have (on average 1.8) internal successors, (90), 49 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:45:59,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:45:59,482 INFO L93 Difference]: Finished difference Result 54666 states and 233673 transitions. [2022-11-19 08:45:59,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-19 08:45:59,484 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.8) internal successors, (90), 49 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-19 08:45:59,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:45:59,722 INFO L225 Difference]: With dead ends: 54666 [2022-11-19 08:45:59,723 INFO L226 Difference]: Without dead ends: 54424 [2022-11-19 08:45:59,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2026 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=1117, Invalid=8389, Unknown=0, NotChecked=0, Total=9506 [2022-11-19 08:45:59,724 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2977 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7490 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2977 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 8320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 7490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 707 IncrementalHoareTripleChecker+Unchecked, 53.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:45:59,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2977 Valid, 0 Invalid, 8320 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [123 Valid, 7490 Invalid, 0 Unknown, 707 Unchecked, 53.5s Time] [2022-11-19 08:45:59,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54424 states. [2022-11-19 08:46:00,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54424 to 17490. [2022-11-19 08:46:00,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17490 states, 17473 states have (on average 4.56761861157214) internal successors, (79810), 17489 states have internal predecessors, (79810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:46:00,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17490 states to 17490 states and 79810 transitions. [2022-11-19 08:46:00,694 INFO L78 Accepts]: Start accepts. Automaton has 17490 states and 79810 transitions. Word has length 16 [2022-11-19 08:46:00,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:46:00,695 INFO L495 AbstractCegarLoop]: Abstraction has 17490 states and 79810 transitions. [2022-11-19 08:46:00,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.8) internal successors, (90), 49 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:46:00,695 INFO L276 IsEmpty]: Start isEmpty. Operand 17490 states and 79810 transitions. [2022-11-19 08:46:00,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 08:46:00,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:46:00,701 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:46:00,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (151)] Forceful destruction successful, exit code 0 [2022-11-19 08:46:00,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (150)] Ended with exit code 0 [2022-11-19 08:46:01,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-11-19 08:46:01,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,150 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,152 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:46:01,315 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:46:01,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:46:01,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1117957639, now seen corresponding path program 3 times [2022-11-19 08:46:01,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:46:01,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487679045] [2022-11-19 08:46:01,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:46:01,316 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:46:01,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:46:01,317 INFO L229 MonitoredProcess]: Starting monitored process 153 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:46:01,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (153)] Waiting until timeout for monitored process [2022-11-19 08:46:01,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 08:46:01,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:46:01,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 08:46:01,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:46:02,186 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:46:02,186 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:46:02,542 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 24 treesize of output 18 [2022-11-19 08:46:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:46:02,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:46:03,828 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:46:03,828 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:46:03,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487679045] [2022-11-19 08:46:03,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487679045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:46:03,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [133271465] [2022-11-19 08:46:03,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:46:03,829 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:46:03,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:46:03,830 INFO L229 MonitoredProcess]: Starting monitored process 154 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:46:03,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (154)] Waiting until timeout for monitored process [2022-11-19 08:46:05,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 08:46:05,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:46:05,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:46:05,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:46:05,364 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:46:05,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:46:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:46:06,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:46:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:46:08,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [133271465] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:46:08,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839601535] [2022-11-19 08:46:08,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:46:08,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:46:08,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:46:08,328 INFO L229 MonitoredProcess]: Starting monitored process 155 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:46:08,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-11-19 08:46:09,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 08:46:09,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:46:09,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 08:46:09,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:46:09,240 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:46:09,241 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:46:10,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:46:10,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:46:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:46:11,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839601535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:46:11,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:46:11,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 8, 8] total 46 [2022-11-19 08:46:11,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994256660] [2022-11-19 08:46:11,714 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:46:11,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-19 08:46:11,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:46:11,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-19 08:46:11,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1899, Unknown=0, NotChecked=0, Total=2162 [2022-11-19 08:46:11,715 INFO L87 Difference]: Start difference. First operand 17490 states and 79810 transitions. Second operand has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 46 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:46:17,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:46:23,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:46:26,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:46:37,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:46:47,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:47:59,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:47:59,344 INFO L93 Difference]: Finished difference Result 52459 states and 217492 transitions. [2022-11-19 08:47:59,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-19 08:47:59,347 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 46 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-19 08:47:59,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:47:59,571 INFO L225 Difference]: With dead ends: 52459 [2022-11-19 08:47:59,571 INFO L226 Difference]: Without dead ends: 52254 [2022-11-19 08:47:59,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2365 ImplicationChecksByTransitivity, 52.3s TimeCoverageRelationStatistics Valid=1637, Invalid=7675, Unknown=0, NotChecked=0, Total=9312 [2022-11-19 08:47:59,572 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3425 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6043 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3425 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 6043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1176 IncrementalHoareTripleChecker+Unchecked, 60.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:47:59,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3425 Valid, 0 Invalid, 7310 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [91 Valid, 6043 Invalid, 0 Unknown, 1176 Unchecked, 60.1s Time] [2022-11-19 08:47:59,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52254 states. [2022-11-19 08:48:00,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52254 to 13752. [2022-11-19 08:48:00,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13752 states, 13735 states have (on average 4.557917728431016) internal successors, (62603), 13751 states have internal predecessors, (62603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:48:00,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13752 states to 13752 states and 62603 transitions. [2022-11-19 08:48:00,415 INFO L78 Accepts]: Start accepts. Automaton has 13752 states and 62603 transitions. Word has length 16 [2022-11-19 08:48:00,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:48:00,415 INFO L495 AbstractCegarLoop]: Abstraction has 13752 states and 62603 transitions. [2022-11-19 08:48:00,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.872340425531915) internal successors, (88), 46 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:48:00,416 INFO L276 IsEmpty]: Start isEmpty. Operand 13752 states and 62603 transitions. [2022-11-19 08:48:00,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 08:48:00,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:48:00,423 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 1, 1, 1, 1] [2022-11-19 08:48:00,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (153)] Forceful destruction successful, exit code 0 [2022-11-19 08:48:00,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-11-19 08:48:00,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (154)] Forceful destruction successful, exit code 0 [2022-11-19 08:48:01,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,155 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,154 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:48:01,024 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2022-11-19 08:48:01,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:48:01,025 INFO L85 PathProgramCache]: Analyzing trace with hash 117133144, now seen corresponding path program 3 times [2022-11-19 08:48:01,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:48:01,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162486871] [2022-11-19 08:48:01,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:48:01,025 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:48:01,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:48:01,026 INFO L229 MonitoredProcess]: Starting monitored process 156 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:48:01,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (156)] Waiting until timeout for monitored process [2022-11-19 08:48:01,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 08:48:01,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:48:01,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 08:48:01,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:48:02,209 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:48:02,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:48:02,996 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:48:02,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:48:07,156 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:48:07,157 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:48:07,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162486871] [2022-11-19 08:48:07,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162486871] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:48:07,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1583618263] [2022-11-19 08:48:07,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:48:07,157 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:48:07,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:48:07,158 INFO L229 MonitoredProcess]: Starting monitored process 157 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:48:07,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (157)] Waiting until timeout for monitored process [2022-11-19 08:48:10,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 08:48:10,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:48:10,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-19 08:48:10,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:48:10,262 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:48:10,262 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:48:10,733 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:48:10,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:48:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:48:16,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1583618263] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:48:16,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621099833] [2022-11-19 08:48:16,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:48:16,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:48:16,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:48:16,886 INFO L229 MonitoredProcess]: Starting monitored process 158 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:48:16,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_80fcb9c3-e5e0-44c0-80e0-19ba60449acb/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-11-19 08:48:18,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 08:48:18,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:48:18,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 08:48:18,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:48:18,500 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 08:48:18,500 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 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 08:48:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:48:19,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:48:22,883 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:48:22,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621099833] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:48:22,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:48:22,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 47 [2022-11-19 08:48:22,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001581971] [2022-11-19 08:48:22,884 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:48:22,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-19 08:48:22,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:48:22,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-19 08:48:22,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1970, Unknown=0, NotChecked=0, Total=2352 [2022-11-19 08:48:22,886 INFO L87 Difference]: Start difference. First operand 13752 states and 62603 transitions. Second operand has 49 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 48 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) [2022-11-19 08:48:30,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:48:31,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:48:33,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:48:35,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:48:39,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:48:40,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:48:42,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:48:48,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:48:49,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:48:51,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:48:54,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:49:09,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:49:12,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:49:17,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:49:26,040 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []