./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba --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 eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc --- 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-b5237d8 [2022-11-22 01:20:22,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:20:22,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:20:22,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:20:22,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:20:22,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:20:22,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:20:22,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:20:22,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:20:22,650 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:20:22,652 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:20:22,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:20:22,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:20:22,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:20:22,660 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:20:22,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:20:22,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:20:22,668 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:20:22,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:20:22,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:20:22,679 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:20:22,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:20:22,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:20:22,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:20:22,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:20:22,696 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:20:22,697 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:20:22,699 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:20:22,700 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:20:22,701 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:20:22,701 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:20:22,702 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:20:22,704 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:20:22,706 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:20:22,709 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:20:22,709 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:20:22,710 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:20:22,710 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:20:22,711 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:20:22,713 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:20:22,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:20:22,714 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 01:20:22,758 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:20:22,758 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:20:22,759 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:20:22,759 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:20:22,760 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:20:22,761 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:20:22,761 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:20:22,761 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:20:22,761 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:20:22,762 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:20:22,763 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:20:22,763 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:20:22,764 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:20:22,764 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:20:22,764 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:20:22,764 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:20:22,765 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:20:22,765 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:20:22,766 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 01:20:22,766 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 01:20:22,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:20:22,766 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:20:22,767 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 01:20:22,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:20:22,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:20:22,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:20:22,768 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 01:20:22,768 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 01:20:22,768 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 01:20:22,769 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:20:22,769 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 01:20:22,769 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:20:22,769 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:20:22,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:20:22,770 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:20:22,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:20:22,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:20:22,771 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:20:22,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:20:22,771 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:20:22,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:20:22,772 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:20:22,772 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_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc [2022-11-22 01:20:23,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:20:23,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:20:23,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:20:23,146 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:20:23,146 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:20:23,148 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2022-11-22 01:20:26,319 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:20:26,533 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:20:26,533 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2022-11-22 01:20:26,541 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/data/1c0b61b63/99f60d23ae29491c9807774591cd60de/FLAG0d89d516b [2022-11-22 01:20:26,560 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/data/1c0b61b63/99f60d23ae29491c9807774591cd60de [2022-11-22 01:20:26,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:20:26,564 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:20:26,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:20:26,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:20:26,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:20:26,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:20:26" (1/1) ... [2022-11-22 01:20:26,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a08c805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:20:26, skipping insertion in model container [2022-11-22 01:20:26,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:20:26" (1/1) ... [2022-11-22 01:20:26,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:20:26,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:20:26,761 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2022-11-22 01:20:26,770 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:20:26,782 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) [2022-11-22 01:20:26,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@59ec9d64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:20:26, skipping insertion in model container [2022-11-22 01:20:26,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:20:26,784 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-22 01:20:26,786 INFO L158 Benchmark]: Toolchain (without parser) took 220.85ms. Allocated memory is still 138.4MB. Free memory was 78.6MB in the beginning and 68.6MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-22 01:20:26,786 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 138.4MB. Free memory is still 114.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 01:20:26,804 INFO L158 Benchmark]: CACSL2BoogieTranslator took 213.27ms. Allocated memory is still 138.4MB. Free memory was 78.3MB in the beginning and 68.6MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-22 01:20:26,805 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 138.4MB. Free memory is still 114.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 213.27ms. Allocated memory is still 138.4MB. Free memory was 78.3MB in the beginning and 68.6MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 112]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba --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 eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc --- 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-b5237d8 [2022-11-22 01:20:29,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:20:29,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:20:29,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:20:29,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:20:29,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:20:29,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:20:29,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:20:29,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:20:29,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:20:29,363 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:20:29,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:20:29,366 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:20:29,369 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:20:29,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:20:29,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:20:29,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:20:29,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:20:29,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:20:29,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:20:29,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:20:29,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:20:29,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:20:29,399 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:20:29,407 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:20:29,411 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:20:29,412 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:20:29,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:20:29,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:20:29,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:20:29,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:20:29,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:20:29,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:20:29,422 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:20:29,424 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:20:29,424 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:20:29,449 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:20:29,449 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:20:29,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:20:29,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:20:29,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:20:29,458 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-22 01:20:29,509 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:20:29,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:20:29,510 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:20:29,511 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:20:29,512 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:20:29,512 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:20:29,512 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:20:29,513 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:20:29,513 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:20:29,513 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:20:29,514 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:20:29,515 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:20:29,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 01:20:29,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 01:20:29,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:20:29,517 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:20:29,517 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 01:20:29,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:20:29,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:20:29,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:20:29,518 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 01:20:29,518 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 01:20:29,518 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 01:20:29,519 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:20:29,519 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 01:20:29,519 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-22 01:20:29,520 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-22 01:20:29,520 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:20:29,520 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:20:29,520 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:20:29,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-22 01:20:29,521 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:20:29,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:20:29,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:20:29,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:20:29,522 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-22 01:20:29,523 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-22 01:20:29,523 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:20:29,523 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-22 01:20:29,523 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_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eecffe8522a4364afb75ce7fb01800caae42a8a3ed11b56f212b94255e6f04bc [2022-11-22 01:20:29,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:20:29,986 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:20:29,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:20:29,990 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:20:29,991 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:20:29,992 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2022-11-22 01:20:33,060 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:20:33,277 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:20:33,278 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2022-11-22 01:20:33,286 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/data/041650363/9cb87812b0fd439aa2dec24bc2cf5064/FLAG00799d01c [2022-11-22 01:20:33,304 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/data/041650363/9cb87812b0fd439aa2dec24bc2cf5064 [2022-11-22 01:20:33,307 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:20:33,309 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:20:33,310 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:20:33,310 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:20:33,314 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:20:33,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:20:33" (1/1) ... [2022-11-22 01:20:33,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ba14566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:20:33, skipping insertion in model container [2022-11-22 01:20:33,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:20:33" (1/1) ... [2022-11-22 01:20:33,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:20:33,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:20:33,524 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2022-11-22 01:20:33,534 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:20:33,549 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-22 01:20:33,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:20:33,569 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2022-11-22 01:20:33,573 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:20:33,579 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:20:33,605 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c[2690,2703] [2022-11-22 01:20:33,608 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:20:33,625 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:20:33,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:20:33 WrapperNode [2022-11-22 01:20:33,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:20:33,627 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:20:33,627 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:20:33,627 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:20:33,634 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:20:33" (1/1) ... [2022-11-22 01:20:33,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:20:33" (1/1) ... [2022-11-22 01:20:33,681 INFO L138 Inliner]: procedures = 28, calls = 43, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 120 [2022-11-22 01:20:33,681 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:20:33,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:20:33,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:20:33,683 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:20:33,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:20:33" (1/1) ... [2022-11-22 01:20:33,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:20:33" (1/1) ... [2022-11-22 01:20:33,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:20:33" (1/1) ... [2022-11-22 01:20:33,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:20:33" (1/1) ... [2022-11-22 01:20:33,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:20:33" (1/1) ... [2022-11-22 01:20:33,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:20:33" (1/1) ... [2022-11-22 01:20:33,770 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:20:33" (1/1) ... [2022-11-22 01:20:33,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:20:33" (1/1) ... [2022-11-22 01:20:33,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:20:33,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:20:33,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:20:33,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:20:33,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:20:33" (1/1) ... [2022-11-22 01:20:33,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:20:33,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:20:33,848 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:20:33,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:20:33,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:20:33,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-22 01:20:33,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:20:33,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-22 01:20:33,886 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-22 01:20:33,886 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-22 01:20:33,886 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-22 01:20:33,886 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-22 01:20:33,887 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-22 01:20:33,887 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-22 01:20:33,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-22 01:20:33,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-22 01:20:33,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 01:20:33,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:20:33,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:20:33,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:20:33,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-22 01:20:33,890 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-22 01:20:34,000 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:20:34,002 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:20:34,570 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:20:34,681 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:20:34,682 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-22 01:20:34,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:20:34 BoogieIcfgContainer [2022-11-22 01:20:34,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:20:34,686 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:20:34,686 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:20:34,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:20:34,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:20:33" (1/3) ... [2022-11-22 01:20:34,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca263a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:20:34, skipping insertion in model container [2022-11-22 01:20:34,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:20:33" (2/3) ... [2022-11-22 01:20:34,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ca263a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:20:34, skipping insertion in model container [2022-11-22 01:20:34,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:20:34" (3/3) ... [2022-11-22 01:20:34,704 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2022-11-22 01:20:34,722 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:20:34,723 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2022-11-22 01:20:34,723 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-22 01:20:34,868 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-22 01:20:34,917 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-22 01:20:34,948 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 213 transitions, 450 flow [2022-11-22 01:20:34,957 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 213 transitions, 450 flow [2022-11-22 01:20:34,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 213 transitions, 450 flow [2022-11-22 01:20:35,103 INFO L130 PetriNetUnfolder]: 16/210 cut-off events. [2022-11-22 01:20:35,103 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-22 01:20:35,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 210 events. 16/210 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 222 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 158. Up to 3 conditions per place. [2022-11-22 01:20:35,117 INFO L119 LiptonReduction]: Number of co-enabled transitions 2868 [2022-11-22 01:21:04,602 INFO L134 LiptonReduction]: Checked pairs total: 4777 [2022-11-22 01:21:04,602 INFO L136 LiptonReduction]: Total number of compositions: 216 [2022-11-22 01:21:04,611 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 62 places, 58 transitions, 140 flow [2022-11-22 01:21:04,734 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1369 states, 1155 states have (on average 4.29004329004329) internal successors, (4955), 1368 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:21:04,752 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:21:04,763 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;@7322b717, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:21:04,763 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2022-11-22 01:21:04,771 INFO L276 IsEmpty]: Start isEmpty. Operand has 1369 states, 1155 states have (on average 4.29004329004329) internal successors, (4955), 1368 states have internal predecessors, (4955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:21:04,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:21:04,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:21:04,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:21:04,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:21:04,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:21:04,785 INFO L85 PathProgramCache]: Analyzing trace with hash 25432, now seen corresponding path program 1 times [2022-11-22 01:21:04,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:21:04,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1077106477] [2022-11-22 01:21:04,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:21:04,809 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 [2022-11-22 01:21:04,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:21:04,819 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:21:04,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:21:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:21:04,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:21:04,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:21:05,348 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:21:05,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:21:05,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:05,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:21:05,422 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:21:05,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1077106477] [2022-11-22 01:21:05,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1077106477] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:21:05,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:21:05,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:21:05,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534394981] [2022-11-22 01:21:05,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:21:05,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:21:05,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:21:05,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:21:05,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:21:05,470 INFO L87 Difference]: Start difference. First operand has 1369 states, 1155 states have (on average 4.29004329004329) internal successors, (4955), 1368 states have internal predecessors, (4955), 0 states have call successors, (0), 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) [2022-11-22 01:21:06,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:21:06,290 INFO L93 Difference]: Finished difference Result 2733 states and 9905 transitions. [2022-11-22 01:21:06,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:21:06,293 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 [2022-11-22 01:21:06,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:21:06,394 INFO L225 Difference]: With dead ends: 2733 [2022-11-22 01:21:06,394 INFO L226 Difference]: Without dead ends: 2733 [2022-11-22 01:21:06,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:21:06,406 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:21:06,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 6 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 01:21:06,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2022-11-22 01:21:06,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 1370. [2022-11-22 01:21:06,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1370 states, 1157 states have (on average 4.288677614520311) internal successors, (4962), 1369 states have internal predecessors, (4962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:21:06,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1370 states to 1370 states and 4962 transitions. [2022-11-22 01:21:06,637 INFO L78 Accepts]: Start accepts. Automaton has 1370 states and 4962 transitions. Word has length 2 [2022-11-22 01:21:06,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:21:06,639 INFO L495 AbstractCegarLoop]: Abstraction has 1370 states and 4962 transitions. [2022-11-22 01:21:06,640 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) [2022-11-22 01:21:06,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1370 states and 4962 transitions. [2022-11-22 01:21:06,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:21:06,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:21:06,645 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:21:06,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:21:06,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:21:06,860 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:21:06,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:21:06,862 INFO L85 PathProgramCache]: Analyzing trace with hash 25434, now seen corresponding path program 1 times [2022-11-22 01:21:06,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:21:06,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996089276] [2022-11-22 01:21:06,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:21:06,867 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 [2022-11-22 01:21:06,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:21:06,869 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:21:06,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:21:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:21:06,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:21:06,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:21:07,087 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:21:07,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:21:07,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:07,114 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:21:07,115 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:21:07,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996089276] [2022-11-22 01:21:07,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996089276] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:21:07,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:21:07,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:21:07,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010292594] [2022-11-22 01:21:07,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:21:07,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:21:07,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:21:07,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:21:07,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:21:07,118 INFO L87 Difference]: Start difference. First operand 1370 states and 4962 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) [2022-11-22 01:21:07,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:21:07,433 INFO L93 Difference]: Finished difference Result 1368 states and 4958 transitions. [2022-11-22 01:21:07,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:21:07,434 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 [2022-11-22 01:21:07,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:21:07,446 INFO L225 Difference]: With dead ends: 1368 [2022-11-22 01:21:07,446 INFO L226 Difference]: Without dead ends: 1368 [2022-11-22 01:21:07,447 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 [2022-11-22 01:21:07,454 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:21:07,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 3 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:21:07,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2022-11-22 01:21:07,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1368. [2022-11-22 01:21:07,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1157 states have (on average 4.285220397579948) internal successors, (4958), 1367 states have internal predecessors, (4958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:21:07,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 4958 transitions. [2022-11-22 01:21:07,515 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 4958 transitions. Word has length 2 [2022-11-22 01:21:07,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:21:07,515 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 4958 transitions. [2022-11-22 01:21:07,515 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) [2022-11-22 01:21:07,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 4958 transitions. [2022-11-22 01:21:07,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 01:21:07,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:21:07,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 01:21:07,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:21:07,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:21:07,728 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:21:07,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:21:07,729 INFO L85 PathProgramCache]: Analyzing trace with hash 795313, now seen corresponding path program 1 times [2022-11-22 01:21:07,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:21:07,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841912887] [2022-11-22 01:21:07,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:21:07,731 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 [2022-11-22 01:21:07,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:21:07,732 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:21:07,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:21:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:21:07,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 01:21:07,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:21:07,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:21:07,987 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-22 01:21:07,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-22 01:21:08,152 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 01:21:08,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-22 01:21:08,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:08,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:21:08,170 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:21:08,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1841912887] [2022-11-22 01:21:08,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1841912887] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:21:08,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:21:08,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:21:08,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598434314] [2022-11-22 01:21:08,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:21:08,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:21:08,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:21:08,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:21:08,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:21:08,173 INFO L87 Difference]: Start difference. First operand 1368 states and 4958 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) [2022-11-22 01:21:08,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:21:08,524 INFO L93 Difference]: Finished difference Result 1127 states and 3956 transitions. [2022-11-22 01:21:08,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:21:08,526 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 [2022-11-22 01:21:08,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:21:08,534 INFO L225 Difference]: With dead ends: 1127 [2022-11-22 01:21:08,534 INFO L226 Difference]: Without dead ends: 1127 [2022-11-22 01:21:08,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:21:08,543 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:21:08,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 3 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:21:08,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-11-22 01:21:08,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1127. [2022-11-22 01:21:08,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 962 states have (on average 4.112266112266112) internal successors, (3956), 1126 states have internal predecessors, (3956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:21:08,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3956 transitions. [2022-11-22 01:21:08,593 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3956 transitions. Word has length 3 [2022-11-22 01:21:08,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:21:08,593 INFO L495 AbstractCegarLoop]: Abstraction has 1127 states and 3956 transitions. [2022-11-22 01:21:08,594 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) [2022-11-22 01:21:08,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3956 transitions. [2022-11-22 01:21:08,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 01:21:08,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:21:08,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 01:21:08,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:21:08,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:21:08,807 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:21:08,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:21:08,808 INFO L85 PathProgramCache]: Analyzing trace with hash 795312, now seen corresponding path program 1 times [2022-11-22 01:21:08,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:21:08,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [343139706] [2022-11-22 01:21:08,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:21:08,808 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:21:08,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:21:08,815 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:21:08,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:21:08,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:21:08,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:21:08,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:21:08,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:21:08,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:21:08,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:21:08,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:21:09,070 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-22 01:21:09,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-22 01:21:09,131 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-22 01:21:09,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-22 01:21:09,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:21:09,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-22 01:21:09,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:09,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:21:09,255 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:21:09,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [343139706] [2022-11-22 01:21:09,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [343139706] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:21:09,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:21:09,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:21:09,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302105303] [2022-11-22 01:21:09,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:21:09,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:21:09,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:21:09,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:21:09,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:21:09,258 INFO L87 Difference]: Start difference. First operand 1127 states and 3956 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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) [2022-11-22 01:21:09,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:21:09,616 INFO L93 Difference]: Finished difference Result 886 states and 2954 transitions. [2022-11-22 01:21:09,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:21:09,617 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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 [2022-11-22 01:21:09,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:21:09,624 INFO L225 Difference]: With dead ends: 886 [2022-11-22 01:21:09,624 INFO L226 Difference]: Without dead ends: 886 [2022-11-22 01:21:09,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:21:09,625 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:21:09,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 3 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:21:09,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2022-11-22 01:21:09,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 886. [2022-11-22 01:21:09,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 767 states have (on average 3.851368970013038) internal successors, (2954), 885 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:21:09,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2954 transitions. [2022-11-22 01:21:09,689 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2954 transitions. Word has length 3 [2022-11-22 01:21:09,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:21:09,690 INFO L495 AbstractCegarLoop]: Abstraction has 886 states and 2954 transitions. [2022-11-22 01:21:09,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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) [2022-11-22 01:21:09,690 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2954 transitions. [2022-11-22 01:21:09,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 01:21:09,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:21:09,691 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 01:21:09,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:21:09,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:21:09,903 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:21:09,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:21:09,904 INFO L85 PathProgramCache]: Analyzing trace with hash 793581, now seen corresponding path program 1 times [2022-11-22 01:21:09,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:21:09,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342468354] [2022-11-22 01:21:09,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:21:09,905 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:21:09,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:21:09,907 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:21:09,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:21:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:21:09,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:21:09,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:21:10,150 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:21:10,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:21:10,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:10,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:21:10,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:10,657 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:21:10,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342468354] [2022-11-22 01:21:10,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342468354] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:21:10,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [254255568] [2022-11-22 01:21:10,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:21:10,658 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:21:10,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:21:10,684 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:21:10,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-22 01:21:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:21:10,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:21:10,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:21:11,002 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:21:11,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:21:11,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:11,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:21:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:11,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [254255568] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:21:11,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900917589] [2022-11-22 01:21:11,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:21:11,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:21:11,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:21:11,173 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:21:11,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:21:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:21:11,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:21:11,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:21:11,478 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:21:11,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:21:11,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:11,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:21:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:11,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900917589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:21:11,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:21:11,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-22 01:21:11,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41312415] [2022-11-22 01:21:11,720 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:21:11,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:21:11,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:21:11,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:21:11,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:21:11,721 INFO L87 Difference]: Start difference. First operand 886 states and 2954 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) [2022-11-22 01:21:14,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:21:14,699 INFO L93 Difference]: Finished difference Result 3529 states and 11795 transitions. [2022-11-22 01:21:14,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:21:14,701 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 [2022-11-22 01:21:14,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:21:14,731 INFO L225 Difference]: With dead ends: 3529 [2022-11-22 01:21:14,732 INFO L226 Difference]: Without dead ends: 3529 [2022-11-22 01:21:14,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:21:14,734 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 409 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:21:14,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 18 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-22 01:21:14,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3529 states. [2022-11-22 01:21:14,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3529 to 892. [2022-11-22 01:21:14,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 773 states have (on average 3.8369987063389392) internal successors, (2966), 891 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:21:14,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2966 transitions. [2022-11-22 01:21:14,791 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2966 transitions. Word has length 3 [2022-11-22 01:21:14,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:21:14,791 INFO L495 AbstractCegarLoop]: Abstraction has 892 states and 2966 transitions. [2022-11-22 01:21:14,791 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) [2022-11-22 01:21:14,792 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2966 transitions. [2022-11-22 01:21:14,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:21:14,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:21:14,793 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:21:14,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:21:15,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:21:15,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:21:15,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:21:15,404 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:21:15,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:21:15,404 INFO L85 PathProgramCache]: Analyzing trace with hash 764311591, now seen corresponding path program 1 times [2022-11-22 01:21:15,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:21:15,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047485637] [2022-11-22 01:21:15,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:21:15,405 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 [2022-11-22 01:21:15,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:21:15,406 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:21:15,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:21:15,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:21:15,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 01:21:15,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:21:15,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:21:15,638 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-22 01:21:15,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-22 01:21:16,066 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-22 01:21:16,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-22 01:21:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:16,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:21:16,210 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:21:16,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047485637] [2022-11-22 01:21:16,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047485637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:21:16,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:21:16,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:21:16,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711031596] [2022-11-22 01:21:16,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:21:16,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:21:16,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:21:16,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:21:16,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:21:16,212 INFO L87 Difference]: Start difference. First operand 892 states and 2966 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) [2022-11-22 01:21:16,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:21:16,557 INFO L93 Difference]: Finished difference Result 839 states and 2804 transitions. [2022-11-22 01:21:16,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:21:16,558 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 [2022-11-22 01:21:16,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:21:16,565 INFO L225 Difference]: With dead ends: 839 [2022-11-22 01:21:16,565 INFO L226 Difference]: Without dead ends: 839 [2022-11-22 01:21:16,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:21:16,568 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:21:16,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 3 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:21:16,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-11-22 01:21:16,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 839. [2022-11-22 01:21:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 738 states have (on average 3.799457994579946) internal successors, (2804), 838 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:21:16,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2804 transitions. [2022-11-22 01:21:16,603 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2804 transitions. Word has length 5 [2022-11-22 01:21:16,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:21:16,604 INFO L495 AbstractCegarLoop]: Abstraction has 839 states and 2804 transitions. [2022-11-22 01:21:16,604 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) [2022-11-22 01:21:16,604 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2804 transitions. [2022-11-22 01:21:16,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:21:16,605 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:21:16,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:21:16,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:21:16,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:21:16,820 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:21:16,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:21:16,820 INFO L85 PathProgramCache]: Analyzing trace with hash 764311593, now seen corresponding path program 1 times [2022-11-22 01:21:16,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:21:16,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508560273] [2022-11-22 01:21:16,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:21:16,821 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 [2022-11-22 01:21:16,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:21:16,822 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:21:16,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-22 01:21:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:21:16,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 01:21:16,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:21:16,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:21:16,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:21:16,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:21:17,089 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-22 01:21:17,090 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 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-22 01:21:17,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-22 01:21:17,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:21:17,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-22 01:21:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:17,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:21:17,281 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:21:17,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508560273] [2022-11-22 01:21:17,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508560273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:21:17,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:21:17,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:21:17,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713180199] [2022-11-22 01:21:17,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:21:17,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:21:17,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:21:17,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:21:17,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:21:17,283 INFO L87 Difference]: Start difference. First operand 839 states and 2804 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:21:17,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:21:17,571 INFO L93 Difference]: Finished difference Result 786 states and 2642 transitions. [2022-11-22 01:21:17,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:21:17,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-22 01:21:17,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:21:17,579 INFO L225 Difference]: With dead ends: 786 [2022-11-22 01:21:17,579 INFO L226 Difference]: Without dead ends: 786 [2022-11-22 01:21:17,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:21:17,580 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 41 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:21:17,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 3 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:21:17,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-11-22 01:21:17,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 786. [2022-11-22 01:21:17,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 703 states have (on average 3.7581792318634424) internal successors, (2642), 785 states have internal predecessors, (2642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:21:17,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 2642 transitions. [2022-11-22 01:21:17,611 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 2642 transitions. Word has length 5 [2022-11-22 01:21:17,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:21:17,612 INFO L495 AbstractCegarLoop]: Abstraction has 786 states and 2642 transitions. [2022-11-22 01:21:17,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:21:17,612 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 2642 transitions. [2022-11-22 01:21:17,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 01:21:17,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:21:17,613 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 01:21:17,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-22 01:21:17,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:21:17,826 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:21:17,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:21:17,827 INFO L85 PathProgramCache]: Analyzing trace with hash -2076150991, now seen corresponding path program 1 times [2022-11-22 01:21:17,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:21:17,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2087694265] [2022-11-22 01:21:17,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:21:17,827 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 [2022-11-22 01:21:17,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:21:17,828 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:21:17,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-22 01:21:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:21:17,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:21:17,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:21:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:17,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:21:17,982 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:21:17,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2087694265] [2022-11-22 01:21:17,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2087694265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:21:17,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:21:17,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:21:17,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167911033] [2022-11-22 01:21:17,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:21:17,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:21:17,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:21:17,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:21:17,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:21:17,985 INFO L87 Difference]: Start difference. First operand 786 states and 2642 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:21:18,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:21:18,732 INFO L93 Difference]: Finished difference Result 1300 states and 4228 transitions. [2022-11-22 01:21:18,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:21:18,732 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 01:21:18,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:21:18,742 INFO L225 Difference]: With dead ends: 1300 [2022-11-22 01:21:18,743 INFO L226 Difference]: Without dead ends: 1300 [2022-11-22 01:21:18,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:21:18,744 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 89 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:21:18,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 13 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:21:18,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-11-22 01:21:18,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1048. [2022-11-22 01:21:18,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 965 states have (on average 3.6766839378238343) internal successors, (3548), 1047 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:21:18,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 3548 transitions. [2022-11-22 01:21:18,786 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 3548 transitions. Word has length 6 [2022-11-22 01:21:18,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:21:18,786 INFO L495 AbstractCegarLoop]: Abstraction has 1048 states and 3548 transitions. [2022-11-22 01:21:18,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:21:18,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 3548 transitions. [2022-11-22 01:21:18,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 01:21:18,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:21:18,787 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-22 01:21:18,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-22 01:21:19,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:21:19,006 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:21:19,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:21:19,006 INFO L85 PathProgramCache]: Analyzing trace with hash -2123079528, now seen corresponding path program 2 times [2022-11-22 01:21:19,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:21:19,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826176213] [2022-11-22 01:21:19,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:21:19,007 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 [2022-11-22 01:21:19,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:21:19,008 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:21:19,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:21:19,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:21:19,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:21:19,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:21:19,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:21:19,261 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:21:19,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:21:19,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:19,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:21:20,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:20,500 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:21:20,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826176213] [2022-11-22 01:21:20,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [826176213] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:21:20,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [654721931] [2022-11-22 01:21:20,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:21:20,501 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:21:20,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:21:20,502 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:21:20,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-22 01:21:20,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:21:20,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:21:20,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:21:20,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:21:20,913 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:21:20,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:21:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:21,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:21:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:21,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [654721931] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:21:21,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742137404] [2022-11-22 01:21:21,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:21:21,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:21:21,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:21:21,252 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:21:21,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 01:21:21,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:21:21,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:21:21,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:21:21,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:21:21,550 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:21:21,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:21:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:21,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:21:21,852 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:21,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742137404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:21:21,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:21:21,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2022-11-22 01:21:21,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129691956] [2022-11-22 01:21:21,853 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:21:21,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 01:21:21,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:21:21,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 01:21:21,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:21:21,854 INFO L87 Difference]: Start difference. First operand 1048 states and 3548 transitions. Second operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:21:25,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:21:26,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:21:28,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:21:30,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:21:31,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:21:33,694 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 [] [2022-11-22 01:21:37,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:21:37,014 INFO L93 Difference]: Finished difference Result 5948 states and 19962 transitions. [2022-11-22 01:21:37,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 01:21:37,015 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-22 01:21:37,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:21:37,052 INFO L225 Difference]: With dead ends: 5948 [2022-11-22 01:21:37,053 INFO L226 Difference]: Without dead ends: 5948 [2022-11-22 01:21:37,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2022-11-22 01:21:37,054 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 879 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 68 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:21:37,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [879 Valid, 87 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1077 Invalid, 2 Unknown, 0 Unchecked, 13.4s Time] [2022-11-22 01:21:37,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5948 states. [2022-11-22 01:21:37,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5948 to 1058. [2022-11-22 01:21:37,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 975 states have (on average 3.6594871794871793) internal successors, (3568), 1057 states have internal predecessors, (3568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:21:37,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3568 transitions. [2022-11-22 01:21:37,183 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3568 transitions. Word has length 6 [2022-11-22 01:21:37,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:21:37,183 INFO L495 AbstractCegarLoop]: Abstraction has 1058 states and 3568 transitions. [2022-11-22 01:21:37,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:21:37,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3568 transitions. [2022-11-22 01:21:37,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:21:37,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:21:37,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:21:37,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:21:37,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-22 01:21:37,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 01:21:37,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:21:37,800 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:21:37,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:21:37,800 INFO L85 PathProgramCache]: Analyzing trace with hash 64050138, now seen corresponding path program 1 times [2022-11-22 01:21:37,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:21:37,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639448475] [2022-11-22 01:21:37,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:21:37,801 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:21:37,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:21:37,802 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:21:37,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:21:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:21:37,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:21:37,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:21:38,026 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-22 01:21:38,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-22 01:21:38,066 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 01:21:38,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-22 01:21:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:38,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:21:38,084 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:21:38,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639448475] [2022-11-22 01:21:38,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639448475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:21:38,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:21:38,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:21:38,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154169212] [2022-11-22 01:21:38,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:21:38,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:21:38,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:21:38,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:21:38,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:21:38,086 INFO L87 Difference]: Start difference. First operand 1058 states and 3568 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) [2022-11-22 01:21:38,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:21:38,263 INFO L93 Difference]: Finished difference Result 996 states and 3387 transitions. [2022-11-22 01:21:38,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:21:38,264 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 [2022-11-22 01:21:38,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:21:38,269 INFO L225 Difference]: With dead ends: 996 [2022-11-22 01:21:38,288 INFO L226 Difference]: Without dead ends: 996 [2022-11-22 01:21:38,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:21:38,289 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 3 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 [2022-11-22 01:21:38,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:21:38,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2022-11-22 01:21:38,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 996. [2022-11-22 01:21:38,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 931 states have (on average 3.6380236305048337) internal successors, (3387), 995 states have internal predecessors, (3387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:21:38,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 3387 transitions. [2022-11-22 01:21:38,323 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 3387 transitions. Word has length 7 [2022-11-22 01:21:38,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:21:38,324 INFO L495 AbstractCegarLoop]: Abstraction has 996 states and 3387 transitions. [2022-11-22 01:21:38,324 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) [2022-11-22 01:21:38,324 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 3387 transitions. [2022-11-22 01:21:38,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:21:38,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:21:38,325 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:21:38,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:21:38,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:21:38,539 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:21:38,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:21:38,540 INFO L85 PathProgramCache]: Analyzing trace with hash 64050139, now seen corresponding path program 1 times [2022-11-22 01:21:38,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:21:38,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655205580] [2022-11-22 01:21:38,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:21:38,541 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 [2022-11-22 01:21:38,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:21:38,542 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:21:38,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:21:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:21:38,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:21:38,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:21:38,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:21:38,855 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-22 01:21:38,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-22 01:21:38,890 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 454 treesize of output 442 [2022-11-22 01:21:38,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:21:38,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-22 01:21:39,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:39,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:21:39,073 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:21:39,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655205580] [2022-11-22 01:21:39,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655205580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:21:39,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:21:39,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:21:39,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89765502] [2022-11-22 01:21:39,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:21:39,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:21:39,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:21:39,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:21:39,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:21:39,075 INFO L87 Difference]: Start difference. First operand 996 states and 3387 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:21:39,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:21:39,388 INFO L93 Difference]: Finished difference Result 934 states and 3206 transitions. [2022-11-22 01:21:39,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:21:39,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 01:21:39,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:21:39,392 INFO L225 Difference]: With dead ends: 934 [2022-11-22 01:21:39,392 INFO L226 Difference]: Without dead ends: 934 [2022-11-22 01:21:39,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:21:39,394 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 70 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:21:39,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:21:39,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 934 states. [2022-11-22 01:21:39,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 934. [2022-11-22 01:21:39,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 887 states have (on average 3.6144306651634723) internal successors, (3206), 933 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:21:39,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3206 transitions. [2022-11-22 01:21:39,442 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3206 transitions. Word has length 7 [2022-11-22 01:21:39,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:21:39,442 INFO L495 AbstractCegarLoop]: Abstraction has 934 states and 3206 transitions. [2022-11-22 01:21:39,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:21:39,442 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3206 transitions. [2022-11-22 01:21:39,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 01:21:39,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:21:39,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:21:39,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-22 01:21:39,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:21:39,663 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:21:39,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:21:39,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1985548307, now seen corresponding path program 1 times [2022-11-22 01:21:39,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:21:39,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170816405] [2022-11-22 01:21:39,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:21:39,664 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 [2022-11-22 01:21:39,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:21:39,665 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:21:39,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:21:39,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:21:39,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:21:39,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:21:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:39,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:21:39,870 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:21:39,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170816405] [2022-11-22 01:21:39,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [170816405] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:21:39,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:21:39,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:21:39,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692237064] [2022-11-22 01:21:39,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:21:39,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:21:39,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:21:39,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:21:39,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:21:39,872 INFO L87 Difference]: Start difference. First operand 934 states and 3206 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) [2022-11-22 01:21:40,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:21:40,398 INFO L93 Difference]: Finished difference Result 888 states and 2904 transitions. [2022-11-22 01:21:40,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:21:40,399 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 8 [2022-11-22 01:21:40,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:21:40,405 INFO L225 Difference]: With dead ends: 888 [2022-11-22 01:21:40,406 INFO L226 Difference]: Without dead ends: 888 [2022-11-22 01:21:40,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:21:40,407 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 64 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:21:40,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 13 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:21:40,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2022-11-22 01:21:40,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 848. [2022-11-22 01:21:40,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 801 states have (on average 3.530586766541823) internal successors, (2828), 847 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:21:40,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2828 transitions. [2022-11-22 01:21:40,447 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2828 transitions. Word has length 8 [2022-11-22 01:21:40,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:21:40,447 INFO L495 AbstractCegarLoop]: Abstraction has 848 states and 2828 transitions. [2022-11-22 01:21:40,448 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) [2022-11-22 01:21:40,448 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2828 transitions. [2022-11-22 01:21:40,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 01:21:40,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:21:40,449 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:21:40,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Ended with exit code 0 [2022-11-22 01:21:40,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:21:40,674 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:21:40,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:21:40,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1270726966, now seen corresponding path program 1 times [2022-11-22 01:21:40,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:21:40,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [752431430] [2022-11-22 01:21:40,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:21:40,675 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 [2022-11-22 01:21:40,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:21:40,676 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:21:40,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:21:40,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:21:40,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:21:40,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:21:41,007 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:21:41,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:21:41,156 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:21:41,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:21:41,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:21:41,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:21:41,361 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:21:41,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-22 01:21:41,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:21:41,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:21:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:21:44,179 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:21:44,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [752431430] [2022-11-22 01:21:44,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [752431430] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:21:44,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1391793947] [2022-11-22 01:21:44,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:21:44,179 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:21:44,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:21:44,180 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:21:44,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-22 01:21:44,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:21:44,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:21:44,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:21:44,644 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:21:44,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:21:44,808 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:21:44,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:21:45,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:21:45,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 01:21:45,021 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:21:45,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-22 01:21:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:21:45,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:21:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:21:46,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1391793947] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:21:46,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582965275] [2022-11-22 01:21:46,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:21:46,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:21:46,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:21:46,644 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:21:46,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-22 01:21:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:21:46,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 01:21:46,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:21:46,961 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:21:46,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:21:47,154 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-22 01:21:47,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 01:21:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:47,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:21:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:21:51,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582965275] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:21:51,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:21:51,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 6, 6] total 22 [2022-11-22 01:21:51,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688126198] [2022-11-22 01:21:51,455 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:21:51,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 01:21:51,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:21:51,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 01:21:51,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=443, Unknown=1, NotChecked=0, Total=552 [2022-11-22 01:21:51,457 INFO L87 Difference]: Start difference. First operand 848 states and 2828 transitions. Second operand has 24 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 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) [2022-11-22 01:22:24,895 WARN L233 SmtUtils]: Spent 32.47s on a formula simplification. DAG size of input: 46 DAG size of output: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:22:35,060 WARN L233 SmtUtils]: Spent 9.70s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:22:57,043 WARN L233 SmtUtils]: Spent 21.38s on a formula simplification. DAG size of input: 52 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:23:14,198 WARN L233 SmtUtils]: Spent 14.68s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:23:31,524 WARN L233 SmtUtils]: Spent 17.14s on a formula simplification. DAG size of input: 58 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:24:01,939 WARN L233 SmtUtils]: Spent 30.02s on a formula simplification. DAG size of input: 54 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:24:16,785 WARN L233 SmtUtils]: Spent 13.93s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:24:25,560 WARN L233 SmtUtils]: Spent 8.28s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:24:33,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:24:33,294 INFO L93 Difference]: Finished difference Result 6753 states and 22990 transitions. [2022-11-22 01:24:33,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 01:24:33,296 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 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 [2022-11-22 01:24:33,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:24:33,327 INFO L225 Difference]: With dead ends: 6753 [2022-11-22 01:24:33,327 INFO L226 Difference]: Without dead ends: 6753 [2022-11-22 01:24:33,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 162.3s TimeCoverageRelationStatistics Valid=454, Invalid=1525, Unknown=1, NotChecked=0, Total=1980 [2022-11-22 01:24:33,329 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1446 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1446 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:24:33,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1446 Valid, 132 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-11-22 01:24:33,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6753 states. [2022-11-22 01:24:33,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6753 to 1317. [2022-11-22 01:24:33,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1270 states have (on average 3.7866141732283465) internal successors, (4809), 1316 states have internal predecessors, (4809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:24:33,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 4809 transitions. [2022-11-22 01:24:33,464 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 4809 transitions. Word has length 8 [2022-11-22 01:24:33,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:24:33,465 INFO L495 AbstractCegarLoop]: Abstraction has 1317 states and 4809 transitions. [2022-11-22 01:24:33,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 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) [2022-11-22 01:24:33,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 4809 transitions. [2022-11-22 01:24:33,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 01:24:33,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:24:33,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:24:33,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-22 01:24:33,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:24:33,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-22 01:24:34,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:24:34,079 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:24:34,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:24:34,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1270726968, now seen corresponding path program 1 times [2022-11-22 01:24:34,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:24:34,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [142458567] [2022-11-22 01:24:34,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:24:34,080 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 [2022-11-22 01:24:34,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:24:34,081 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:24:34,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-22 01:24:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:24:34,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 01:24:34,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:24:34,320 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:24:34,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:24:34,367 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:24:34,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-22 01:24:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:24:34,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:24:34,414 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:24:34,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [142458567] [2022-11-22 01:24:34,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [142458567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:24:34,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:24:34,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:24:34,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462460252] [2022-11-22 01:24:34,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:24:34,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:24:34,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:24:34,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:24:34,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:24:34,416 INFO L87 Difference]: Start difference. First operand 1317 states and 4809 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) [2022-11-22 01:24:34,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:24:34,645 INFO L93 Difference]: Finished difference Result 1079 states and 3725 transitions. [2022-11-22 01:24:34,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:24:34,646 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 [2022-11-22 01:24:34,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:24:34,650 INFO L225 Difference]: With dead ends: 1079 [2022-11-22 01:24:34,650 INFO L226 Difference]: Without dead ends: 1079 [2022-11-22 01:24:34,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:24:34,651 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 63 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:24:34,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 3 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:24:34,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2022-11-22 01:24:34,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 1079. [2022-11-22 01:24:34,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1053 states have (on average 3.5375118708452042) internal successors, (3725), 1078 states have internal predecessors, (3725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:24:34,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 3725 transitions. [2022-11-22 01:24:34,685 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 3725 transitions. Word has length 8 [2022-11-22 01:24:34,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:24:34,685 INFO L495 AbstractCegarLoop]: Abstraction has 1079 states and 3725 transitions. [2022-11-22 01:24:34,686 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) [2022-11-22 01:24:34,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 3725 transitions. [2022-11-22 01:24:34,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:24:34,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:24:34,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:24:34,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-11-22 01:24:34,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:24:34,900 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:24:34,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:24:34,901 INFO L85 PathProgramCache]: Analyzing trace with hash 737836580, now seen corresponding path program 1 times [2022-11-22 01:24:34,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:24:34,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1710688111] [2022-11-22 01:24:34,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:24:34,902 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 [2022-11-22 01:24:34,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:24:34,902 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:24:34,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:24:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:24:35,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 01:24:35,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:24:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:24:35,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:24:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:24:35,412 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:24:35,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1710688111] [2022-11-22 01:24:35,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1710688111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:24:35,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [521566493] [2022-11-22 01:24:35,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:24:35,413 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:24:35,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:24:35,414 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:24:35,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-22 01:24:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:24:35,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:24:35,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:24:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:24:35,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:24:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:24:35,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [521566493] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:24:35,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670558160] [2022-11-22 01:24:35,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:24:35,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:24:35,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:24:35,810 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:24:35,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-22 01:24:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:24:35,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 01:24:35,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:24:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:24:36,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:24:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:24:36,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670558160] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:24:36,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:24:36,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2022-11-22 01:24:36,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684678887] [2022-11-22 01:24:36,068 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:24:36,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 01:24:36,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:24:36,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 01:24:36,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:24:36,069 INFO L87 Difference]: Start difference. First operand 1079 states and 3725 transitions. Second operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:24:38,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:24:38,457 INFO L93 Difference]: Finished difference Result 1919 states and 6475 transitions. [2022-11-22 01:24:38,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 01:24:38,458 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 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 [2022-11-22 01:24:38,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:24:38,465 INFO L225 Difference]: With dead ends: 1919 [2022-11-22 01:24:38,465 INFO L226 Difference]: Without dead ends: 1919 [2022-11-22 01:24:38,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-11-22 01:24:38,466 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 351 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:24:38,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 65 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-22 01:24:38,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2022-11-22 01:24:38,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1366. [2022-11-22 01:24:38,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1340 states have (on average 3.62089552238806) internal successors, (4852), 1365 states have internal predecessors, (4852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:24:38,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 4852 transitions. [2022-11-22 01:24:38,515 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 4852 transitions. Word has length 9 [2022-11-22 01:24:38,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:24:38,515 INFO L495 AbstractCegarLoop]: Abstraction has 1366 states and 4852 transitions. [2022-11-22 01:24:38,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:24:38,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 4852 transitions. [2022-11-22 01:24:38,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:24:38,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:24:38,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:24:38,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:24:38,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-22 01:24:38,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-22 01:24:39,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:24:39,129 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:24:39,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:24:39,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1152697721, now seen corresponding path program 1 times [2022-11-22 01:24:39,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:24:39,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787917146] [2022-11-22 01:24:39,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:24:39,130 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 [2022-11-22 01:24:39,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:24:39,132 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:24:39,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-22 01:24:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:24:39,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:24:39,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:24:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:24:39,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:24:39,318 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:24:39,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787917146] [2022-11-22 01:24:39,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787917146] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:24:39,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:24:39,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:24:39,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070210466] [2022-11-22 01:24:39,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:24:39,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:24:39,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:24:39,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:24:39,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:24:39,320 INFO L87 Difference]: Start difference. First operand 1366 states and 4852 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) [2022-11-22 01:24:39,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:24:39,734 INFO L93 Difference]: Finished difference Result 1812 states and 6384 transitions. [2022-11-22 01:24:39,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:24:39,735 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 [2022-11-22 01:24:39,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:24:39,741 INFO L225 Difference]: With dead ends: 1812 [2022-11-22 01:24:39,741 INFO L226 Difference]: Without dead ends: 1812 [2022-11-22 01:24:39,741 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 [2022-11-22 01:24:39,742 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:24:39,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 9 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:24:39,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2022-11-22 01:24:39,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1664. [2022-11-22 01:24:39,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1664 states, 1638 states have (on average 3.664224664224664) internal successors, (6002), 1663 states have internal predecessors, (6002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:24:39,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 6002 transitions. [2022-11-22 01:24:39,799 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 6002 transitions. Word has length 10 [2022-11-22 01:24:39,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:24:39,800 INFO L495 AbstractCegarLoop]: Abstraction has 1664 states and 6002 transitions. [2022-11-22 01:24:39,800 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) [2022-11-22 01:24:39,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 6002 transitions. [2022-11-22 01:24:39,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:24:39,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:24:39,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:24:39,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-22 01:24:40,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:24:40,016 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:24:40,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:24:40,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1404760281, now seen corresponding path program 1 times [2022-11-22 01:24:40,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:24:40,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2136360040] [2022-11-22 01:24:40,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:24:40,018 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 [2022-11-22 01:24:40,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:24:40,019 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:24:40,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-22 01:24:40,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:24:40,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:24:40,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:24:40,418 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:24:40,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:24:40,578 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:24:40,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:24:40,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:24:40,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:24:40,738 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:24:40,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-22 01:24:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:24:40,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:24:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:24:43,636 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:24:43,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2136360040] [2022-11-22 01:24:43,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2136360040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:24:43,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1534548333] [2022-11-22 01:24:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:24:43,637 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:24:43,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:24:43,638 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:24:43,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-11-22 01:24:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:24:43,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:24:43,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:24:44,133 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:24:44,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:24:44,311 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:24:44,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:24:44,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:24:44,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 01:24:44,594 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:24:44,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-22 01:24:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:24:44,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:24:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:24:45,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1534548333] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:24:45,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371148148] [2022-11-22 01:24:45,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:24:45,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:24:45,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:24:45,947 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:24:45,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-22 01:24:46,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:24:46,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 01:24:46,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:24:46,246 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:24:46,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:24:46,494 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-22 01:24:46,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 01:24:46,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:24:46,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:24:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:24:48,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371148148] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:24:48,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:24:48,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 6, 6] total 22 [2022-11-22 01:24:48,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414383317] [2022-11-22 01:24:48,896 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:24:48,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 01:24:48,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:24:48,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 01:24:48,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-11-22 01:24:48,897 INFO L87 Difference]: Start difference. First operand 1664 states and 6002 transitions. Second operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:24:57,811 WARN L233 SmtUtils]: Spent 7.93s on a formula simplification. DAG size of input: 46 DAG size of output: 45 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:25:09,383 WARN L233 SmtUtils]: Spent 11.07s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:25:19,126 WARN L233 SmtUtils]: Spent 9.12s on a formula simplification. DAG size of input: 52 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:25:48,825 WARN L233 SmtUtils]: Spent 23.84s on a formula simplification. DAG size of input: 54 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:26:17,833 WARN L233 SmtUtils]: Spent 28.01s on a formula simplification. DAG size of input: 58 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:26:26,288 WARN L233 SmtUtils]: Spent 7.97s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:26:34,618 WARN L233 SmtUtils]: Spent 7.12s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:26:47,644 WARN L233 SmtUtils]: Spent 12.69s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:27:21,177 WARN L233 SmtUtils]: Spent 31.98s on a formula simplification. DAG size of input: 60 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:27:37,196 WARN L233 SmtUtils]: Spent 14.76s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:27:39,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:27:39,605 INFO L93 Difference]: Finished difference Result 5087 states and 17185 transitions. [2022-11-22 01:27:39,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-22 01:27:39,606 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-22 01:27:39,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:27:39,620 INFO L225 Difference]: With dead ends: 5087 [2022-11-22 01:27:39,621 INFO L226 Difference]: Without dead ends: 5087 [2022-11-22 01:27:39,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 168.6s TimeCoverageRelationStatistics Valid=545, Invalid=1807, Unknown=0, NotChecked=0, Total=2352 [2022-11-22 01:27:39,622 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1475 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1475 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:27:39,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1475 Valid, 147 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-11-22 01:27:39,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5087 states. [2022-11-22 01:27:39,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5087 to 1817. [2022-11-22 01:27:39,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1817 states, 1791 states have (on average 3.7202680067001674) internal successors, (6663), 1816 states have internal predecessors, (6663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:27:39,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1817 states to 1817 states and 6663 transitions. [2022-11-22 01:27:39,745 INFO L78 Accepts]: Start accepts. Automaton has 1817 states and 6663 transitions. Word has length 10 [2022-11-22 01:27:39,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:27:39,745 INFO L495 AbstractCegarLoop]: Abstraction has 1817 states and 6663 transitions. [2022-11-22 01:27:39,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:27:39,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1817 states and 6663 transitions. [2022-11-22 01:27:39,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:27:39,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:27:39,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:27:39,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-11-22 01:27:39,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-11-22 01:27:40,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-22 01:27:40,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:27:40,364 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:27:40,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:27:40,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1404760282, now seen corresponding path program 1 times [2022-11-22 01:27:40,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:27:40,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2094500729] [2022-11-22 01:27:40,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:27:40,366 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 [2022-11-22 01:27:40,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:27:40,367 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:27:40,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-22 01:27:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:27:40,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:27:40,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:27:40,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-22 01:27:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:27:40,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:27:40,554 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:27:40,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2094500729] [2022-11-22 01:27:40,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2094500729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:27:40,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:27:40,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:27:40,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781284974] [2022-11-22 01:27:40,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:27:40,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:27:40,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:27:40,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:27:40,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:27:40,556 INFO L87 Difference]: Start difference. First operand 1817 states and 6663 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:27:40,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:27:40,808 INFO L93 Difference]: Finished difference Result 1459 states and 5256 transitions. [2022-11-22 01:27:40,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:27:40,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-22 01:27:40,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:27:40,814 INFO L225 Difference]: With dead ends: 1459 [2022-11-22 01:27:40,814 INFO L226 Difference]: Without dead ends: 1459 [2022-11-22 01:27:40,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:27:40,816 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 56 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:27:40,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 3 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:27:40,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2022-11-22 01:27:40,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1459. [2022-11-22 01:27:40,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1445 states have (on average 3.637370242214533) internal successors, (5256), 1458 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:27:40,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 5256 transitions. [2022-11-22 01:27:40,871 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 5256 transitions. Word has length 10 [2022-11-22 01:27:40,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:27:40,871 INFO L495 AbstractCegarLoop]: Abstraction has 1459 states and 5256 transitions. [2022-11-22 01:27:40,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:27:40,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 5256 transitions. [2022-11-22 01:27:40,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:27:40,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:27:40,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:27:40,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2022-11-22 01:27:41,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:27:41,086 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:27:41,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:27:41,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1404760283, now seen corresponding path program 1 times [2022-11-22 01:27:41,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:27:41,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71813755] [2022-11-22 01:27:41,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:27:41,087 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 [2022-11-22 01:27:41,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:27:41,088 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:27:41,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:27:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:27:41,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:27:41,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:27:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:27:41,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:27:41,693 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 25 treesize of output 21 [2022-11-22 01:27:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:27:41,798 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:27:41,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71813755] [2022-11-22 01:27:41,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71813755] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:27:41,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1737707414] [2022-11-22 01:27:41,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:27:41,798 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:27:41,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:27:41,799 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:27:41,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-22 01:27:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:27:42,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:27:42,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:27:42,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 01:27:42,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:27:42,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:27:42,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:27:42,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1737707414] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:27:42,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845303415] [2022-11-22 01:27:42,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:27:42,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:27:42,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:27:42,798 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:27:42,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-22 01:27:42,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:27:42,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:27:42,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:27:43,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 01:27:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:27:43,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:27:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:27:43,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845303415] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 01:27:43,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2022-11-22 01:27:43,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5, 5, 5, 5] total 23 [2022-11-22 01:27:43,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066740023] [2022-11-22 01:27:43,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:27:43,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:27:43,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:27:43,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:27:43,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-11-22 01:27:43,711 INFO L87 Difference]: Start difference. First operand 1459 states and 5256 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2022-11-22 01:27:45,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:27:45,329 INFO L93 Difference]: Finished difference Result 1554 states and 5313 transitions. [2022-11-22 01:27:45,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:27:45,331 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 [2022-11-22 01:27:45,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:27:45,344 INFO L225 Difference]: With dead ends: 1554 [2022-11-22 01:27:45,345 INFO L226 Difference]: Without dead ends: 1554 [2022-11-22 01:27:45,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-11-22 01:27:45,346 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 148 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:27:45,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 21 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-22 01:27:45,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2022-11-22 01:27:45,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1405. [2022-11-22 01:27:45,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1391 states have (on average 3.578001437814522) internal successors, (4977), 1404 states have internal predecessors, (4977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:27:45,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 4977 transitions. [2022-11-22 01:27:45,385 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 4977 transitions. Word has length 10 [2022-11-22 01:27:45,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:27:45,386 INFO L495 AbstractCegarLoop]: Abstraction has 1405 states and 4977 transitions. [2022-11-22 01:27:45,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2022-11-22 01:27:45,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 4977 transitions. [2022-11-22 01:27:45,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 01:27:45,387 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:27:45,387 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:27:45,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-11-22 01:27:45,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-22 01:27:45,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-22 01:27:46,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:27:46,002 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:27:46,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:27:46,003 INFO L85 PathProgramCache]: Analyzing trace with hash 2040692137, now seen corresponding path program 2 times [2022-11-22 01:27:46,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:27:46,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233709409] [2022-11-22 01:27:46,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:27:46,003 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 [2022-11-22 01:27:46,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:27:46,004 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:27:46,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:27:46,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:27:46,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:27:46,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:27:46,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:27:46,342 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 01:27:46,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-22 01:27:46,489 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:27:46,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:27:46,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:27:46,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:27:46,619 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:27:46,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-22 01:27:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:27:46,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:27:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:27:49,790 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:27:49,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233709409] [2022-11-22 01:27:49,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233709409] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:27:49,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [814944496] [2022-11-22 01:27:49,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:27:49,791 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:27:49,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:27:49,793 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:27:49,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-22 01:27:50,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:27:50,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:27:50,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 01:27:50,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:27:50,427 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:27:50,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:27:50,616 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:27:50,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:27:50,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:27:50,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 01:27:50,976 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:27:50,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-22 01:27:51,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:27:51,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:27:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:27:53,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [814944496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:27:53,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996989131] [2022-11-22 01:27:53,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:27:53,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:27:53,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:27:53,256 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:27:53,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-22 01:27:53,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:27:53,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:27:53,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:27:53,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:27:53,680 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:27:53,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:27:53,865 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:27:53,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:27:54,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:27:54,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:27:54,262 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:27:54,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-22 01:27:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:27:54,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:27:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:27:59,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996989131] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:27:59,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:27:59,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 29 [2022-11-22 01:27:59,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918362121] [2022-11-22 01:27:59,643 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:27:59,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-22 01:27:59,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:27:59,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-22 01:27:59,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2022-11-22 01:27:59,645 INFO L87 Difference]: Start difference. First operand 1405 states and 4977 transitions. Second operand has 31 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:28:12,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:28:12,612 INFO L93 Difference]: Finished difference Result 5276 states and 17891 transitions. [2022-11-22 01:28:12,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-22 01:28:12,613 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-22 01:28:12,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:28:12,632 INFO L225 Difference]: With dead ends: 5276 [2022-11-22 01:28:12,632 INFO L226 Difference]: Without dead ends: 5276 [2022-11-22 01:28:12,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=574, Invalid=2078, Unknown=0, NotChecked=0, Total=2652 [2022-11-22 01:28:12,633 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1436 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 2178 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1436 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 2216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:28:12,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1436 Valid, 247 Invalid, 2216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2178 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-11-22 01:28:12,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2022-11-22 01:28:12,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 1673. [2022-11-22 01:28:12,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1659 states have (on average 3.6106088004822183) internal successors, (5990), 1672 states have internal predecessors, (5990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:28:12,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 5990 transitions. [2022-11-22 01:28:12,725 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 5990 transitions. Word has length 11 [2022-11-22 01:28:12,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:28:12,726 INFO L495 AbstractCegarLoop]: Abstraction has 1673 states and 5990 transitions. [2022-11-22 01:28:12,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:28:12,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 5990 transitions. [2022-11-22 01:28:12,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 01:28:12,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:28:12,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:28:12,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:28:12,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-22 01:28:13,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-22 01:28:13,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:28:13,344 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:28:13,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:28:13,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1354924344, now seen corresponding path program 1 times [2022-11-22 01:28:13,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:28:13,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514918733] [2022-11-22 01:28:13,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:28:13,345 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 [2022-11-22 01:28:13,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:28:13,346 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:28:13,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:28:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:28:13,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 01:28:13,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:28:13,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:28:13,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:28:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:28:13,879 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:28:13,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514918733] [2022-11-22 01:28:13,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514918733] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:28:13,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1149042807] [2022-11-22 01:28:13,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:28:13,880 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:28:13,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:28:13,881 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:28:13,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-22 01:28:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:28:14,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:28:14,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:28:14,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:28:14,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:28:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:28:14,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1149042807] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:28:14,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197739965] [2022-11-22 01:28:14,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:28:14,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:28:14,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:28:14,309 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:28:14,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-22 01:28:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:28:14,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 01:28:14,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:28:14,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:28:14,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:28:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:28:14,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197739965] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:28:14,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:28:14,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2022-11-22 01:28:14,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489543987] [2022-11-22 01:28:14,623 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:28:14,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 01:28:14,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:28:14,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 01:28:14,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:28:14,624 INFO L87 Difference]: Start difference. First operand 1673 states and 5990 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:28:16,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:28:16,594 INFO L93 Difference]: Finished difference Result 1733 states and 5905 transitions. [2022-11-22 01:28:16,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 01:28:16,595 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 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 [2022-11-22 01:28:16,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:28:16,600 INFO L225 Difference]: With dead ends: 1733 [2022-11-22 01:28:16,600 INFO L226 Difference]: Without dead ends: 1733 [2022-11-22 01:28:16,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-11-22 01:28:16,602 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 309 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:28:16,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 70 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-22 01:28:16,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2022-11-22 01:28:16,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1570. [2022-11-22 01:28:16,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1556 states have (on average 3.543701799485861) internal successors, (5514), 1569 states have internal predecessors, (5514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:28:16,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5514 transitions. [2022-11-22 01:28:16,651 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5514 transitions. Word has length 12 [2022-11-22 01:28:16,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:28:16,651 INFO L495 AbstractCegarLoop]: Abstraction has 1570 states and 5514 transitions. [2022-11-22 01:28:16,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:28:16,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5514 transitions. [2022-11-22 01:28:16,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 01:28:16,653 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:28:16,653 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-22 01:28:16,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-22 01:28:16,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-22 01:28:17,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-22 01:28:17,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:28:17,268 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:28:17,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:28:17,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1163046895, now seen corresponding path program 3 times [2022-11-22 01:28:17,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:28:17,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [146822938] [2022-11-22 01:28:17,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:28:17,269 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 [2022-11-22 01:28:17,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:28:17,270 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:28:17,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:28:17,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:28:17,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:28:17,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:28:17,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:28:17,627 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:28:17,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:28:17,776 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:28:17,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:28:17,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:28:17,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:28:17,920 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:28:17,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-22 01:28:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:28:18,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:28:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:28:19,485 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:28:19,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [146822938] [2022-11-22 01:28:19,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [146822938] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:28:19,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1111222091] [2022-11-22 01:28:19,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:28:19,486 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:28:19,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:28:19,488 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:28:19,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-22 01:28:19,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:28:19,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:28:19,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:28:19,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:28:20,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:28:20,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:28:21,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:28:21,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1111222091] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:28:21,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376345277] [2022-11-22 01:28:21,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:28:21,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:28:21,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:28:21,118 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:28:21,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-22 01:28:21,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:28:21,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:28:21,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:28:21,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:28:21,558 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:28:21,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:28:21,733 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:28:21,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:28:21,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:28:21,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:28:21,843 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:28:21,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-22 01:28:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:28:21,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:28:22,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:28:22,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376345277] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:28:22,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:28:22,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7, 7, 5, 5] total 24 [2022-11-22 01:28:22,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351435099] [2022-11-22 01:28:22,544 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:28:22,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-22 01:28:22,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:28:22,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-22 01:28:22,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-11-22 01:28:22,546 INFO L87 Difference]: Start difference. First operand 1570 states and 5514 transitions. Second operand has 26 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:28:37,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:28:37,702 INFO L93 Difference]: Finished difference Result 3515 states and 11762 transitions. [2022-11-22 01:28:37,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-22 01:28:37,704 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 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 [2022-11-22 01:28:37,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:28:37,712 INFO L225 Difference]: With dead ends: 3515 [2022-11-22 01:28:37,712 INFO L226 Difference]: Without dead ends: 3515 [2022-11-22 01:28:37,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=761, Invalid=2899, Unknown=0, NotChecked=0, Total=3660 [2022-11-22 01:28:37,713 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 2042 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2042 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 2148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:28:37,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2042 Valid, 249 Invalid, 2148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2057 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2022-11-22 01:28:37,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3515 states. [2022-11-22 01:28:37,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3515 to 2175. [2022-11-22 01:28:37,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 2161 states have (on average 3.774641369736233) internal successors, (8157), 2174 states have internal predecessors, (8157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:28:37,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 8157 transitions. [2022-11-22 01:28:37,789 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 8157 transitions. Word has length 12 [2022-11-22 01:28:37,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:28:37,789 INFO L495 AbstractCegarLoop]: Abstraction has 2175 states and 8157 transitions. [2022-11-22 01:28:37,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:28:37,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 8157 transitions. [2022-11-22 01:28:37,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 01:28:37,791 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:28:37,791 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-22 01:28:37,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-22 01:28:37,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-22 01:28:38,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-22 01:28:38,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:28:38,393 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:28:38,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:28:38,394 INFO L85 PathProgramCache]: Analyzing trace with hash 389165176, now seen corresponding path program 3 times [2022-11-22 01:28:38,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:28:38,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428681188] [2022-11-22 01:28:38,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:28:38,395 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 [2022-11-22 01:28:38,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:28:38,396 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:28:38,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:28:38,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 01:28:38,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:28:38,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:28:38,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:28:38,835 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:28:38,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:28:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:28:39,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:28:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:28:42,884 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:28:42,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [428681188] [2022-11-22 01:28:42,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [428681188] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:28:42,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [51041305] [2022-11-22 01:28:42,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:28:42,884 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:28:42,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:28:42,885 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:28:42,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-22 01:28:43,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 01:28:43,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:28:43,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:28:43,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:28:43,960 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:28:43,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:28:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:28:44,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:28:44,561 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:28:44,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [51041305] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:28:44,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239052463] [2022-11-22 01:28:44,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:28:44,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:28:44,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:28:44,564 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:28:44,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-22 01:28:47,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 01:28:47,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:28:47,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:28:47,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:28:47,202 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:28:47,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:28:47,401 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:28:47,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:28:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:28:47,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239052463] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:28:47,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:28:47,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 22 [2022-11-22 01:28:47,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953460377] [2022-11-22 01:28:47,884 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:28:47,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 01:28:47,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:28:47,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 01:28:47,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-22 01:28:47,886 INFO L87 Difference]: Start difference. First operand 2175 states and 8157 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) [2022-11-22 01:29:06,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:29:08,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:29:10,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:29:12,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:29:14,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:29:16,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:29:18,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:29:20,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:29:22,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:29:24,391 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 [] [2022-11-22 01:29:34,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:29:34,796 INFO L93 Difference]: Finished difference Result 14751 states and 57985 transitions. [2022-11-22 01:29:34,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 01:29:34,798 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 [2022-11-22 01:29:34,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:29:34,905 INFO L225 Difference]: With dead ends: 14751 [2022-11-22 01:29:34,905 INFO L226 Difference]: Without dead ends: 14751 [2022-11-22 01:29:34,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 01:29:34,906 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2244 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 3698 mSolverCounterSat, 304 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2244 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 4012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 3698 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:29:34,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2244 Valid, 393 Invalid, 4012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 3698 Invalid, 10 Unknown, 0 Unchecked, 30.7s Time] [2022-11-22 01:29:34,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14751 states. [2022-11-22 01:29:35,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14751 to 2195. [2022-11-22 01:29:35,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2195 states, 2181 states have (on average 3.7583677212287943) internal successors, (8197), 2194 states have internal predecessors, (8197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:29:35,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2195 states to 2195 states and 8197 transitions. [2022-11-22 01:29:35,237 INFO L78 Accepts]: Start accepts. Automaton has 2195 states and 8197 transitions. Word has length 12 [2022-11-22 01:29:35,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:29:35,238 INFO L495 AbstractCegarLoop]: Abstraction has 2195 states and 8197 transitions. [2022-11-22 01:29:35,238 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) [2022-11-22 01:29:35,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2195 states and 8197 transitions. [2022-11-22 01:29:35,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 01:29:35,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:29:35,243 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:29:35,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-22 01:29:35,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2022-11-22 01:29:35,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-22 01:29:35,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:29:35,856 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:29:35,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:29:35,857 INFO L85 PathProgramCache]: Analyzing trace with hash 547825102, now seen corresponding path program 2 times [2022-11-22 01:29:35,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:29:35,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1600905917] [2022-11-22 01:29:35,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:29:35,858 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 [2022-11-22 01:29:35,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:29:35,859 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:29:35,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-22 01:29:36,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-22 01:29:36,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:29:36,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:29:36,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:29:36,329 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:29:36,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:29:36,526 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:29:36,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:29:36,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:36,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:29:36,704 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:29:36,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-22 01:29:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:29:36,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:29:36,856 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:29:36,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1600905917] [2022-11-22 01:29:36,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1600905917] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:29:36,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:29:36,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:29:36,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926986789] [2022-11-22 01:29:36,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:29:36,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:29:36,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:29:36,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:29:36,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:29:36,858 INFO L87 Difference]: Start difference. First operand 2195 states and 8197 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:29:37,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:29:37,338 INFO L93 Difference]: Finished difference Result 2177 states and 7914 transitions. [2022-11-22 01:29:37,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:29:37,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-22 01:29:37,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:29:37,345 INFO L225 Difference]: With dead ends: 2177 [2022-11-22 01:29:37,345 INFO L226 Difference]: Without dead ends: 2177 [2022-11-22 01:29:37,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:29:37,346 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 90 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:29:37,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 7 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:29:37,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2177 states. [2022-11-22 01:29:37,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2177 to 1709. [2022-11-22 01:29:37,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 1695 states have (on average 3.728023598820059) internal successors, (6319), 1708 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:29:37,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 6319 transitions. [2022-11-22 01:29:37,417 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 6319 transitions. Word has length 13 [2022-11-22 01:29:37,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:29:37,418 INFO L495 AbstractCegarLoop]: Abstraction has 1709 states and 6319 transitions. [2022-11-22 01:29:37,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:29:37,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 6319 transitions. [2022-11-22 01:29:37,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 01:29:37,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:29:37,419 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:29:37,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-22 01:29:37,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:29:37,620 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:29:37,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:29:37,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1105368979, now seen corresponding path program 2 times [2022-11-22 01:29:37,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:29:37,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573874833] [2022-11-22 01:29:37,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:29:37,621 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 [2022-11-22 01:29:37,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:29:37,623 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:29:37,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:29:37,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:29:37,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:29:37,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:29:37,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:29:38,080 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 01:29:38,080 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 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-22 01:29:38,295 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:29:38,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:29:38,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:38,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:29:38,442 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:29:38,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-22 01:29:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:29:38,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:29:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:29:39,939 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:29:39,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573874833] [2022-11-22 01:29:39,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573874833] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:29:39,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [631445575] [2022-11-22 01:29:39,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:29:39,939 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:29:39,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:29:39,941 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:29:39,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-22 01:29:40,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:29:40,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:29:40,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 01:29:40,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:29:40,648 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:29:40,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:29:40,851 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:29:40,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:29:41,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:41,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 01:29:41,245 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:29:41,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-22 01:29:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:29:41,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:29:48,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:29:48,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [631445575] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:29:48,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211452669] [2022-11-22 01:29:48,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:29:48,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:29:48,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:29:48,876 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:29:48,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-22 01:29:49,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:29:49,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:29:49,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:29:49,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:29:49,402 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:29:49,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:29:49,615 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:29:49,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:29:50,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:29:50,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:29:50,103 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:29:50,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-22 01:29:50,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:29:50,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:29:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:29:51,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211452669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:29:51,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:29:51,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 29 [2022-11-22 01:29:51,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819014916] [2022-11-22 01:29:51,789 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:29:51,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-22 01:29:51,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:29:51,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-22 01:29:51,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2022-11-22 01:29:51,791 INFO L87 Difference]: Start difference. First operand 1709 states and 6319 transitions. Second operand has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:07,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:07,279 INFO L93 Difference]: Finished difference Result 3898 states and 13423 transitions. [2022-11-22 01:30:07,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-22 01:30:07,280 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 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 [2022-11-22 01:30:07,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:07,291 INFO L225 Difference]: With dead ends: 3898 [2022-11-22 01:30:07,292 INFO L226 Difference]: Without dead ends: 3898 [2022-11-22 01:30:07,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=589, Invalid=2167, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 01:30:07,293 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1217 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 1609 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 1660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:07,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1217 Valid, 215 Invalid, 1660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1609 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-11-22 01:30:07,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3898 states. [2022-11-22 01:30:07,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3898 to 1955. [2022-11-22 01:30:07,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1955 states, 1941 states have (on average 3.867594023699124) internal successors, (7507), 1954 states have internal predecessors, (7507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:07,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1955 states to 1955 states and 7507 transitions. [2022-11-22 01:30:07,390 INFO L78 Accepts]: Start accepts. Automaton has 1955 states and 7507 transitions. Word has length 14 [2022-11-22 01:30:07,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:07,390 INFO L495 AbstractCegarLoop]: Abstraction has 1955 states and 7507 transitions. [2022-11-22 01:30:07,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:07,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1955 states and 7507 transitions. [2022-11-22 01:30:07,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 01:30:07,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:07,395 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:30:07,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-11-22 01:30:07,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-22 01:30:07,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-22 01:30:08,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:30:08,005 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:30:08,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:08,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1105368981, now seen corresponding path program 1 times [2022-11-22 01:30:08,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:30:08,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864505128] [2022-11-22 01:30:08,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:08,006 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 [2022-11-22 01:30:08,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:30:08,007 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:30:08,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:30:08,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:08,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:30:08,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:30:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:30:08,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:30:09,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-22 01:30:09,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:30:09,400 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:30:09,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864505128] [2022-11-22 01:30:09,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864505128] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:30:09,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [729310247] [2022-11-22 01:30:09,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:09,401 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:30:09,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:30:09,403 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:30:09,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-22 01:30:09,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:09,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 01:30:09,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:30:10,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 01:30:10,733 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:30:10,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:30:11,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:30:11,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [729310247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:30:11,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132113066] [2022-11-22 01:30:11,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:11,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:30:11,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:30:11,410 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:30:11,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-22 01:30:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:11,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:30:11,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:30:11,764 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 01:30:12,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:30:12,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:30:13,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:30:13,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132113066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:30:13,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:30:13,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 5, 5] total 33 [2022-11-22 01:30:13,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558178525] [2022-11-22 01:30:13,814 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:30:13,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-22 01:30:13,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:30:13,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-22 01:30:13,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 01:30:13,815 INFO L87 Difference]: Start difference. First operand 1955 states and 7507 transitions. Second operand has 34 states, 33 states have (on average 2.0) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:37,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:37,369 INFO L93 Difference]: Finished difference Result 7549 states and 29515 transitions. [2022-11-22 01:30:37,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-22 01:30:37,371 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 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 [2022-11-22 01:30:37,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:37,410 INFO L225 Difference]: With dead ends: 7549 [2022-11-22 01:30:37,410 INFO L226 Difference]: Without dead ends: 7435 [2022-11-22 01:30:37,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=1300, Invalid=5180, Unknown=0, NotChecked=0, Total=6480 [2022-11-22 01:30:37,412 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3403 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 1718 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3403 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:37,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3403 Valid, 244 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1718 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2022-11-22 01:30:37,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7435 states. [2022-11-22 01:30:37,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7435 to 2575. [2022-11-22 01:30:37,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2575 states, 2560 states have (on average 4.023828125) internal successors, (10301), 2574 states have internal predecessors, (10301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:37,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 10301 transitions. [2022-11-22 01:30:37,512 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 10301 transitions. Word has length 14 [2022-11-22 01:30:37,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:37,512 INFO L495 AbstractCegarLoop]: Abstraction has 2575 states and 10301 transitions. [2022-11-22 01:30:37,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0) internal successors, (66), 34 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:37,512 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 10301 transitions. [2022-11-22 01:30:37,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 01:30:37,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:37,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:30:37,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-22 01:30:37,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-11-22 01:30:37,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-22 01:30:38,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:30:38,116 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:30:38,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:38,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1325798855, now seen corresponding path program 1 times [2022-11-22 01:30:38,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:30:38,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911679658] [2022-11-22 01:30:38,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:30:38,117 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 [2022-11-22 01:30:38,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:30:38,118 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:30:38,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-22 01:30:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:30:38,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 01:30:38,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:30:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:30:38,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:30:38,499 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:30:38,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911679658] [2022-11-22 01:30:38,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911679658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:30:38,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:30:38,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:30:38,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856138613] [2022-11-22 01:30:38,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:30:38,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:30:38,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:30:38,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:30:38,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:30:38,501 INFO L87 Difference]: Start difference. First operand 2575 states and 10301 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:39,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:39,541 INFO L93 Difference]: Finished difference Result 3853 states and 15700 transitions. [2022-11-22 01:30:39,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:30:39,543 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 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 [2022-11-22 01:30:39,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:39,558 INFO L225 Difference]: With dead ends: 3853 [2022-11-22 01:30:39,558 INFO L226 Difference]: Without dead ends: 3853 [2022-11-22 01:30:39,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:30:39,559 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 144 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:39,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 17 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:30:39,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3853 states. [2022-11-22 01:30:39,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3853 to 2985. [2022-11-22 01:30:39,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2985 states, 2970 states have (on average 4.272053872053872) internal successors, (12688), 2984 states have internal predecessors, (12688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:39,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2985 states to 2985 states and 12688 transitions. [2022-11-22 01:30:39,662 INFO L78 Accepts]: Start accepts. Automaton has 2985 states and 12688 transitions. Word has length 15 [2022-11-22 01:30:39,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:39,663 INFO L495 AbstractCegarLoop]: Abstraction has 2985 states and 12688 transitions. [2022-11-22 01:30:39,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:39,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2985 states and 12688 transitions. [2022-11-22 01:30:39,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 01:30:39,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:39,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:30:39,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-22 01:30:39,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:30:39,881 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:30:39,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:39,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1322800535, now seen corresponding path program 2 times [2022-11-22 01:30:39,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:30:39,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879481308] [2022-11-22 01:30:39,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:30:39,882 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 [2022-11-22 01:30:39,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:30:39,883 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:30:39,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:30:40,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-22 01:30:40,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:30:40,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 01:30:40,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:30:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:30:40,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:30:40,264 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:30:40,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879481308] [2022-11-22 01:30:40,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879481308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:30:40,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:30:40,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:30:40,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118138933] [2022-11-22 01:30:40,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:30:40,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:30:40,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:30:40,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:30:40,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:30:40,266 INFO L87 Difference]: Start difference. First operand 2985 states and 12688 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:41,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:41,307 INFO L93 Difference]: Finished difference Result 4061 states and 17396 transitions. [2022-11-22 01:30:41,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:30:41,308 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 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 [2022-11-22 01:30:41,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:41,325 INFO L225 Difference]: With dead ends: 4061 [2022-11-22 01:30:41,325 INFO L226 Difference]: Without dead ends: 4061 [2022-11-22 01:30:41,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:30:41,326 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 137 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:41,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 22 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:30:41,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4061 states. [2022-11-22 01:30:41,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4061 to 2985. [2022-11-22 01:30:41,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2985 states, 2970 states have (on average 4.272053872053872) internal successors, (12688), 2984 states have internal predecessors, (12688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:41,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2985 states to 2985 states and 12688 transitions. [2022-11-22 01:30:41,427 INFO L78 Accepts]: Start accepts. Automaton has 2985 states and 12688 transitions. Word has length 15 [2022-11-22 01:30:41,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:41,427 INFO L495 AbstractCegarLoop]: Abstraction has 2985 states and 12688 transitions. [2022-11-22 01:30:41,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:41,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2985 states and 12688 transitions. [2022-11-22 01:30:41,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 01:30:41,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:41,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:30:41,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-22 01:30:41,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:30:41,643 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:30:41,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:41,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1294666813, now seen corresponding path program 3 times [2022-11-22 01:30:41,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:30:41,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1638798979] [2022-11-22 01:30:41,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:30:41,644 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 [2022-11-22 01:30:41,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:30:41,645 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:30:41,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-22 01:30:41,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-22 01:30:41,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:30:41,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 01:30:41,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:30:42,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:30:42,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:30:42,016 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:30:42,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1638798979] [2022-11-22 01:30:42,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1638798979] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:30:42,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:30:42,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-22 01:30:42,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059098842] [2022-11-22 01:30:42,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:30:42,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 01:30:42,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:30:42,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 01:30:42,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:30:42,018 INFO L87 Difference]: Start difference. First operand 2985 states and 12688 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:42,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:30:42,967 INFO L93 Difference]: Finished difference Result 5139 states and 22061 transitions. [2022-11-22 01:30:42,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:30:42,970 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 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 [2022-11-22 01:30:42,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:30:42,990 INFO L225 Difference]: With dead ends: 5139 [2022-11-22 01:30:42,990 INFO L226 Difference]: Without dead ends: 5139 [2022-11-22 01:30:42,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:30:42,991 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 132 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:30:42,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 16 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:30:43,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5139 states. [2022-11-22 01:30:43,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5139 to 2901. [2022-11-22 01:30:43,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2901 states, 2886 states have (on average 4.262993762993763) internal successors, (12303), 2900 states have internal predecessors, (12303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:43,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2901 states to 2901 states and 12303 transitions. [2022-11-22 01:30:43,115 INFO L78 Accepts]: Start accepts. Automaton has 2901 states and 12303 transitions. Word has length 15 [2022-11-22 01:30:43,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:30:43,115 INFO L495 AbstractCegarLoop]: Abstraction has 2901 states and 12303 transitions. [2022-11-22 01:30:43,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:30:43,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2901 states and 12303 transitions. [2022-11-22 01:30:43,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 01:30:43,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:30:43,118 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:30:43,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-22 01:30:43,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:30:43,331 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:30:43,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:30:43,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1402691954, now seen corresponding path program 3 times [2022-11-22 01:30:43,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:30:43,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63809685] [2022-11-22 01:30:43,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:30:43,332 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 [2022-11-22 01:30:43,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:30:43,333 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:30:43,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-22 01:30:43,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:30:43,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:30:43,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:30:43,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:30:43,982 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:30:43,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:30:44,118 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 15 treesize of output 11 [2022-11-22 01:30:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:30:44,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:30:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:30:45,050 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:30:45,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63809685] [2022-11-22 01:30:45,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [63809685] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:30:45,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [450422148] [2022-11-22 01:30:45,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:30:45,051 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:30:45,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:30:45,053 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:30:45,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-22 01:30:45,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:30:45,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:30:45,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:30:45,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:30:46,261 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:30:46,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:30:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:30:46,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [450422148] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:30:46,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730549566] [2022-11-22 01:30:46,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:30:46,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:30:46,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:30:46,610 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:30:46,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-22 01:30:47,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-22 01:30:47,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:30:47,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:30:47,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:30:47,749 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:30:47,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:30:47,961 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:30:47,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:30:48,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:30:48,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:30:48,163 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:30:48,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-22 01:30:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:30:48,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:30:51,573 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:30:51,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730549566] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:30:51,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:30:51,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 6, 6] total 30 [2022-11-22 01:30:51,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345179578] [2022-11-22 01:30:51,574 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:30:51,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-22 01:30:51,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:30:51,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-22 01:30:51,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2022-11-22 01:30:51,576 INFO L87 Difference]: Start difference. First operand 2901 states and 12303 transitions. Second operand has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:31:10,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:31:10,237 INFO L93 Difference]: Finished difference Result 4277 states and 17140 transitions. [2022-11-22 01:31:10,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-22 01:31:10,240 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 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 [2022-11-22 01:31:10,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:31:10,254 INFO L225 Difference]: With dead ends: 4277 [2022-11-22 01:31:10,254 INFO L226 Difference]: Without dead ends: 4277 [2022-11-22 01:31:10,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=836, Invalid=3454, Unknown=0, NotChecked=0, Total=4290 [2022-11-22 01:31:10,256 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1879 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 2015 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1879 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 2098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:31:10,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1879 Valid, 285 Invalid, 2098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2015 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2022-11-22 01:31:10,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4277 states. [2022-11-22 01:31:10,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4277 to 3225. [2022-11-22 01:31:10,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3225 states, 3210 states have (on average 4.308411214953271) internal successors, (13830), 3224 states have internal predecessors, (13830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:31:10,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 13830 transitions. [2022-11-22 01:31:10,342 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 13830 transitions. Word has length 16 [2022-11-22 01:31:10,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:31:10,342 INFO L495 AbstractCegarLoop]: Abstraction has 3225 states and 13830 transitions. [2022-11-22 01:31:10,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:31:10,343 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 13830 transitions. [2022-11-22 01:31:10,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-22 01:31:10,345 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:31:10,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:31:10,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-22 01:31:10,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-11-22 01:31:10,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2022-11-22 01:31:10,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:31:10,946 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:31:10,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:31:10,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1512546082, now seen corresponding path program 1 times [2022-11-22 01:31:10,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:31:10,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [189348775] [2022-11-22 01:31:10,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:31:10,947 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 [2022-11-22 01:31:10,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:31:10,948 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:31:10,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:31:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:31:11,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:31:11,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:31:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:31:11,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:31:11,300 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:31:11,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [189348775] [2022-11-22 01:31:11,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [189348775] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:31:11,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:31:11,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:31:11,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213326917] [2022-11-22 01:31:11,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:31:11,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:31:11,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:31:11,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:31:11,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:31:11,303 INFO L87 Difference]: Start difference. First operand 3225 states and 13830 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:31:12,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:31:12,059 INFO L93 Difference]: Finished difference Result 3661 states and 15252 transitions. [2022-11-22 01:31:12,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:31:12,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-22 01:31:12,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:31:12,073 INFO L225 Difference]: With dead ends: 3661 [2022-11-22 01:31:12,073 INFO L226 Difference]: Without dead ends: 3653 [2022-11-22 01:31:12,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:31:12,074 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 49 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:31:12,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 15 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:31:12,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3653 states. [2022-11-22 01:31:12,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3653 to 3373. [2022-11-22 01:31:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3373 states, 3358 states have (on average 4.322215604526503) internal successors, (14514), 3372 states have internal predecessors, (14514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:31:12,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3373 states to 3373 states and 14514 transitions. [2022-11-22 01:31:12,206 INFO L78 Accepts]: Start accepts. Automaton has 3373 states and 14514 transitions. Word has length 17 [2022-11-22 01:31:12,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:31:12,206 INFO L495 AbstractCegarLoop]: Abstraction has 3373 states and 14514 transitions. [2022-11-22 01:31:12,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:31:12,207 INFO L276 IsEmpty]: Start isEmpty. Operand 3373 states and 14514 transitions. [2022-11-22 01:31:12,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-22 01:31:12,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:31:12,210 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:31:12,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:31:12,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:31:12,423 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:31:12,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:31:12,424 INFO L85 PathProgramCache]: Analyzing trace with hash 250004676, now seen corresponding path program 2 times [2022-11-22 01:31:12,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:31:12,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1077232260] [2022-11-22 01:31:12,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:31:12,425 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 [2022-11-22 01:31:12,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:31:12,426 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:31:12,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:31:12,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:31:12,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:31:12,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:31:12,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:31:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:31:12,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:31:12,833 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:31:12,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1077232260] [2022-11-22 01:31:12,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1077232260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:31:12,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:31:12,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:31:12,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077027275] [2022-11-22 01:31:12,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:31:12,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:31:12,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:31:12,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:31:12,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:31:12,835 INFO L87 Difference]: Start difference. First operand 3373 states and 14514 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:31:13,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:31:13,718 INFO L93 Difference]: Finished difference Result 3301 states and 13889 transitions. [2022-11-22 01:31:13,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:31:13,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-22 01:31:13,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:31:13,736 INFO L225 Difference]: With dead ends: 3301 [2022-11-22 01:31:13,737 INFO L226 Difference]: Without dead ends: 3281 [2022-11-22 01:31:13,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:31:13,738 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 65 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:31:13,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 16 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:31:13,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3281 states. [2022-11-22 01:31:13,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3281 to 3011. [2022-11-22 01:31:13,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3011 states, 2997 states have (on average 4.286286286286287) internal successors, (12846), 3010 states have internal predecessors, (12846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:31:13,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 12846 transitions. [2022-11-22 01:31:13,844 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 12846 transitions. Word has length 17 [2022-11-22 01:31:13,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:31:13,845 INFO L495 AbstractCegarLoop]: Abstraction has 3011 states and 12846 transitions. [2022-11-22 01:31:13,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:31:13,845 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 12846 transitions. [2022-11-22 01:31:13,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 01:31:13,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:31:13,848 INFO L195 NwaCegarLoop]: trace histogram [12, 3, 1, 1, 1] [2022-11-22 01:31:13,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:31:14,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:31:14,065 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:31:14,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:31:14,065 INFO L85 PathProgramCache]: Analyzing trace with hash 2141225693, now seen corresponding path program 1 times [2022-11-22 01:31:14,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:31:14,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [138121272] [2022-11-22 01:31:14,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:31:14,066 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 [2022-11-22 01:31:14,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:31:14,067 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:31:14,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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)] Waiting until timeout for monitored process [2022-11-22 01:31:14,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:31:14,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-22 01:31:14,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:31:14,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 01:31:15,145 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:31:15,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:31:20,566 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:31:20,566 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:31:20,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [138121272] [2022-11-22 01:31:20,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [138121272] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:31:20,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2129209300] [2022-11-22 01:31:20,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:31:20,567 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:31:20,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:31:20,568 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:31:20,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (61)] Waiting until timeout for monitored process [2022-11-22 01:31:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:31:21,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 01:31:21,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:31:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 01:31:22,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:31:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 01:31:24,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2129209300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:31:24,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225393071] [2022-11-22 01:31:24,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:31:24,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:31:24,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:31:24,714 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:31:24,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-22 01:31:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:31:25,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 01:31:25,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:31:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 01:31:26,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:31:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 01:31:27,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225393071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:31:27,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:31:27,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 9, 9, 9, 9] total 56 [2022-11-22 01:31:27,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715929200] [2022-11-22 01:31:27,855 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:31:27,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-22 01:31:27,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:31:27,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-22 01:31:27,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=2871, Unknown=0, NotChecked=0, Total=3192 [2022-11-22 01:31:27,857 INFO L87 Difference]: Start difference. First operand 3011 states and 12846 transitions. Second operand has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:31:53,156 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 [] [2022-11-22 01:31:57,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:32:40,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:32:40,169 INFO L93 Difference]: Finished difference Result 35273 states and 159092 transitions. [2022-11-22 01:32:40,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-22 01:32:40,171 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-22 01:32:40,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:32:40,549 INFO L225 Difference]: With dead ends: 35273 [2022-11-22 01:32:40,549 INFO L226 Difference]: Without dead ends: 35273 [2022-11-22 01:32:40,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=1106, Invalid=7450, Unknown=0, NotChecked=0, Total=8556 [2022-11-22 01:32:40,552 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 4240 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 7472 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4240 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 7736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 7472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:32:40,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4240 Valid, 843 Invalid, 7736 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [264 Valid, 7472 Invalid, 0 Unknown, 0 Unchecked, 56.3s Time] [2022-11-22 01:32:40,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35273 states. [2022-11-22 01:32:41,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35273 to 3019. [2022-11-22 01:32:41,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 3005 states have (on average 4.27820299500832) internal successors, (12856), 3018 states have internal predecessors, (12856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:32:41,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 12856 transitions. [2022-11-22 01:32:41,342 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 12856 transitions. Word has length 18 [2022-11-22 01:32:41,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:32:41,342 INFO L495 AbstractCegarLoop]: Abstraction has 3019 states and 12856 transitions. [2022-11-22 01:32:41,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:32:41,343 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 12856 transitions. [2022-11-22 01:32:41,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 01:32:41,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:32:41,382 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-22 01:32:41,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (61)] Forceful destruction successful, exit code 0 [2022-11-22 01:32:41,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-22 01:32:41,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-11-22 01:32:41,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:32:41,984 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:32:41,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:32:41,985 INFO L85 PathProgramCache]: Analyzing trace with hash 908756758, now seen corresponding path program 4 times [2022-11-22 01:32:41,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:32:41,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442731901] [2022-11-22 01:32:41,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:32:41,986 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 [2022-11-22 01:32:41,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:32:41,987 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:32:41,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:32:42,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:32:42,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:32:42,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:32:42,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:32:42,611 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:32:42,612 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:32:42,798 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 12 [2022-11-22 01:32:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:32:43,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:32:44,183 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:32:44,184 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:32:44,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442731901] [2022-11-22 01:32:44,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442731901] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:32:44,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1134242408] [2022-11-22 01:32:44,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:32:44,184 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:32:44,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:32:44,186 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:32:44,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (64)] Waiting until timeout for monitored process [2022-11-22 01:32:44,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:32:44,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:32:44,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 01:32:44,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:32:45,458 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:32:45,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:32:45,951 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:32:45,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1134242408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:32:45,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071473239] [2022-11-22 01:32:45,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:32:45,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:32:45,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:32:45,953 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:32:45,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-22 01:32:46,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:32:46,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:32:46,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:32:46,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:32:46,704 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:32:46,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:32:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:32:47,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071473239] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:32:47,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:32:47,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 37 [2022-11-22 01:32:47,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822481443] [2022-11-22 01:32:47,323 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:32:47,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-22 01:32:47,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:32:47,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-22 01:32:47,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=1098, Unknown=0, NotChecked=0, Total=1406 [2022-11-22 01:32:47,325 INFO L87 Difference]: Start difference. First operand 3019 states and 12856 transitions. Second operand has 38 states, 38 states have (on average 1.394736842105263) internal successors, (53), 37 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:33:00,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:33:00,718 INFO L93 Difference]: Finished difference Result 4637 states and 18964 transitions. [2022-11-22 01:33:00,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-22 01:33:00,720 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.394736842105263) internal successors, (53), 37 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-22 01:33:00,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:33:00,736 INFO L225 Difference]: With dead ends: 4637 [2022-11-22 01:33:00,736 INFO L226 Difference]: Without dead ends: 4637 [2022-11-22 01:33:00,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=803, Invalid=2979, Unknown=0, NotChecked=0, Total=3782 [2022-11-22 01:33:00,737 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1153 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 3137 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 3232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 3137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:33:00,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1153 Valid, 417 Invalid, 3232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 3137 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2022-11-22 01:33:00,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4637 states. [2022-11-22 01:33:00,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4637 to 4029. [2022-11-22 01:33:00,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4029 states, 4015 states have (on average 4.257534246575342) internal successors, (17094), 4028 states have internal predecessors, (17094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:33:00,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4029 states to 4029 states and 17094 transitions. [2022-11-22 01:33:00,907 INFO L78 Accepts]: Start accepts. Automaton has 4029 states and 17094 transitions. Word has length 18 [2022-11-22 01:33:00,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:33:00,907 INFO L495 AbstractCegarLoop]: Abstraction has 4029 states and 17094 transitions. [2022-11-22 01:33:00,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.394736842105263) internal successors, (53), 37 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:33:00,907 INFO L276 IsEmpty]: Start isEmpty. Operand 4029 states and 17094 transitions. [2022-11-22 01:33:00,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-22 01:33:00,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:33:00,911 INFO L195 NwaCegarLoop]: trace histogram [13, 4, 1, 1, 1] [2022-11-22 01:33:00,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (64)] Forceful destruction successful, exit code 0 [2022-11-22 01:33:01,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:33:01,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-11-22 01:33:01,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:33:01,514 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:33:01,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:33:01,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1865665464, now seen corresponding path program 2 times [2022-11-22 01:33:01,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:33:01,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722926951] [2022-11-22 01:33:01,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:33:01,515 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 [2022-11-22 01:33:01,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:33:01,517 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:33:01,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (66)] Waiting until timeout for monitored process [2022-11-22 01:33:01,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:33:01,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:33:01,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-22 01:33:01,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:33:02,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 01:33:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 48 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 01:33:02,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:33:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:33:08,956 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:33:08,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722926951] [2022-11-22 01:33:08,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722926951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:33:08,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1000109344] [2022-11-22 01:33:08,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:33:08,956 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:33:08,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:33:08,958 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:33:08,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (67)] Waiting until timeout for monitored process [2022-11-22 01:33:09,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:33:09,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:33:09,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 01:33:09,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:33:09,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 01:33:10,787 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 01:33:10,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:33:14,194 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 01:33:14,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1000109344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:33:14,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513746868] [2022-11-22 01:33:14,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:33:14,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:33:14,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:33:14,204 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:33:14,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-11-22 01:33:14,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:33:14,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:33:14,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 01:33:14,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:33:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 01:33:16,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:33:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 01:33:19,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513746868] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:33:19,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:33:19,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 11, 11, 11, 11] total 67 [2022-11-22 01:33:19,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360039438] [2022-11-22 01:33:19,166 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:33:19,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-22 01:33:19,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:33:19,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-22 01:33:19,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=4100, Unknown=0, NotChecked=0, Total=4556 [2022-11-22 01:33:19,168 INFO L87 Difference]: Start difference. First operand 4029 states and 17094 transitions. Second operand has 68 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 67 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:34:41,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:34:41,716 INFO L93 Difference]: Finished difference Result 39626 states and 176244 transitions. [2022-11-22 01:34:41,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-22 01:34:41,720 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 67 states have internal predecessors, (75), 0 states have call successors, (0), 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 20 [2022-11-22 01:34:41,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:34:41,911 INFO L225 Difference]: With dead ends: 39626 [2022-11-22 01:34:41,911 INFO L226 Difference]: Without dead ends: 39626 [2022-11-22 01:34:41,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2770 ImplicationChecksByTransitivity, 30.0s TimeCoverageRelationStatistics Valid=1547, Invalid=10443, Unknown=0, NotChecked=0, Total=11990 [2022-11-22 01:34:41,914 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 5310 mSDsluCounter, 1227 mSDsCounter, 0 mSdLazyCounter, 11241 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5310 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 11590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 11241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 66.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:34:41,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5310 Valid, 1260 Invalid, 11590 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [349 Valid, 11241 Invalid, 0 Unknown, 0 Unchecked, 66.5s Time] [2022-11-22 01:34:41,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39626 states. [2022-11-22 01:34:42,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39626 to 4035. [2022-11-22 01:34:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4035 states, 4021 states have (on average 4.2529221586669985) internal successors, (17101), 4034 states have internal predecessors, (17101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:34:42,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4035 states to 4035 states and 17101 transitions. [2022-11-22 01:34:42,324 INFO L78 Accepts]: Start accepts. Automaton has 4035 states and 17101 transitions. Word has length 20 [2022-11-22 01:34:42,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:34:42,324 INFO L495 AbstractCegarLoop]: Abstraction has 4035 states and 17101 transitions. [2022-11-22 01:34:42,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 67 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:34:42,324 INFO L276 IsEmpty]: Start isEmpty. Operand 4035 states and 17101 transitions. [2022-11-22 01:34:42,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-22 01:34:42,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:34:42,326 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-22 01:34:42,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (67)] Forceful destruction successful, exit code 0 [2022-11-22 01:34:42,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-11-22 01:34:42,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-22 01:34:42,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:34:42,928 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-22 01:34:42,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:34:42,929 INFO L85 PathProgramCache]: Analyzing trace with hash 633196529, now seen corresponding path program 5 times [2022-11-22 01:34:42,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:34:42,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1103629325] [2022-11-22 01:34:42,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 01:34:42,929 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 [2022-11-22 01:34:42,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:34:42,930 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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) [2022-11-22 01:34:42,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/mathsat -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 [2022-11-22 01:34:43,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-22 01:34:43,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:34:43,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-22 01:34:43,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:34:43,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 01:34:43,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-22 01:34:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:34:44,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:34:46,225 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:34:46,225 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:34:46,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1103629325] [2022-11-22 01:34:46,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1103629325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:34:46,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [667648633] [2022-11-22 01:34:46,225 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 01:34:46,226 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:34:46,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:34:46,227 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:34:46,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (70)] Waiting until timeout for monitored process [2022-11-22 01:35:06,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-22 01:35:06,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:35:06,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:35:06,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:35:07,020 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:35:07,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:35:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:35:08,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [667648633] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:35:08,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135409680] [2022-11-22 01:35:08,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-22 01:35:08,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:35:08,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:35:08,019 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:35:08,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa2083c0-5efe-45fc-bbac-c5c7b570ffa6/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-11-22 01:35:13,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-22 01:35:13,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:35:13,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 01:35:13,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:35:14,040 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:35:14,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:35:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:35:15,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135409680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:35:15,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:35:15,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 12, 12, 14, 14] total 52 [2022-11-22 01:35:15,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306753601] [2022-11-22 01:35:15,048 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:35:15,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-22 01:35:15,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:35:15,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-22 01:35:15,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=576, Invalid=2076, Unknown=0, NotChecked=0, Total=2652 [2022-11-22 01:35:15,049 INFO L87 Difference]: Start difference. First operand 4035 states and 17101 transitions. Second operand has 52 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 52 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)