./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:18:30,584 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:18:30,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:18:30,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:18:30,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:18:30,618 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:18:30,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:18:30,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:18:30,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:18:30,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:18:30,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:18:30,629 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:18:30,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:18:30,631 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:18:30,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:18:30,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:18:30,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:18:30,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:18:30,640 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:18:30,642 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:18:30,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:18:30,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:18:30,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:18:30,649 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:18:30,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:18:30,655 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:18:30,656 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:18:30,657 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:18:30,658 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:18:30,659 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:18:30,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:18:30,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:18:30,666 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:18:30,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:18:30,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:18:30,672 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:18:30,674 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:18:30,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:18:30,675 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:18:30,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:18:30,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:18:30,679 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 07:18:30,717 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:18:30,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:18:30,718 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:18:30,718 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:18:30,719 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:18:30,719 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:18:30,720 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:18:30,720 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:18:30,720 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:18:30,721 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:18:30,721 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:18:30,721 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:18:30,721 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:18:30,722 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:18:30,722 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:18:30,722 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:18:30,723 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:18:30,723 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:18:30,724 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:18:30,724 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:18:30,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:18:30,725 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:18:30,725 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:18:30,725 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:18:30,726 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:18:30,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:18:30,726 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:18:30,726 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:18:30,727 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:18:30,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:18:30,727 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:18:30,728 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:18:30,728 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:18:30,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:18:30,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:18:30,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:18:30,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:18:30,729 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:18:30,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:18:30,730 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:18:30,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:18:30,731 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:18:30,731 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_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a [2022-11-19 07:18:31,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:18:31,088 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:18:31,091 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:18:31,093 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:18:31,094 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:18:31,096 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2022-11-19 07:18:31,203 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/data/0d89bea6f/c175af32a4e8405f920a9786b86f1d1d/FLAGfceade20f [2022-11-19 07:18:31,880 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:18:31,881 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2022-11-19 07:18:31,893 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/data/0d89bea6f/c175af32a4e8405f920a9786b86f1d1d/FLAGfceade20f [2022-11-19 07:18:32,224 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/data/0d89bea6f/c175af32a4e8405f920a9786b86f1d1d [2022-11-19 07:18:32,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:18:32,229 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:18:32,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:18:32,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:18:32,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:18:32,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:18:32" (1/1) ... [2022-11-19 07:18:32,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ec80b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:32, skipping insertion in model container [2022-11-19 07:18:32,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:18:32" (1/1) ... [2022-11-19 07:18:32,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:18:32,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:18:32,614 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2022-11-19 07:18:32,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:18:32,644 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-19 07:18:32,645 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@720d44f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:32, skipping insertion in model container [2022-11-19 07:18:32,645 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:18:32,646 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-19 07:18:32,649 INFO L158 Benchmark]: Toolchain (without parser) took 418.31ms. Allocated memory is still 104.9MB. Free memory was 75.0MB in the beginning and 79.9MB in the end (delta: -4.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 07:18:32,651 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 104.9MB. Free memory is still 59.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:18:32,653 INFO L158 Benchmark]: CACSL2BoogieTranslator took 413.29ms. Allocated memory is still 104.9MB. Free memory was 74.8MB in the beginning and 79.9MB in the end (delta: -5.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 07:18:32,655 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 104.9MB. Free memory is still 59.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 413.29ms. Allocated memory is still 104.9MB. Free memory was 74.8MB in the beginning and 79.9MB in the end (delta: -5.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 157]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:18:35,271 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:18:35,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:18:35,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:18:35,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:18:35,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:18:35,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:18:35,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:18:35,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:18:35,316 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:18:35,317 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:18:35,319 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:18:35,320 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:18:35,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:18:35,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:18:35,324 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:18:35,325 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:18:35,327 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:18:35,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:18:35,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:18:35,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:18:35,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:18:35,337 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:18:35,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:18:35,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:18:35,343 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:18:35,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:18:35,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:18:35,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:18:35,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:18:35,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:18:35,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:18:35,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:18:35,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:18:35,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:18:35,352 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:18:35,353 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:18:35,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:18:35,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:18:35,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:18:35,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:18:35,357 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-19 07:18:35,414 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:18:35,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:18:35,421 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:18:35,422 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:18:35,424 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:18:35,427 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:18:35,427 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:18:35,428 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:18:35,428 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:18:35,428 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:18:35,430 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:18:35,430 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:18:35,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:18:35,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:18:35,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:18:35,433 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:18:35,433 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:18:35,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:18:35,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:18:35,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:18:35,435 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:18:35,435 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:18:35,435 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:18:35,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:18:35,436 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:18:35,436 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 07:18:35,437 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 07:18:35,437 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:18:35,437 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:18:35,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:18:35,438 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 07:18:35,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:18:35,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:18:35,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:18:35,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:18:35,441 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 07:18:35,441 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 07:18:35,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:18:35,442 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 07:18:35,442 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_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df820220e47314ad1ae7e5e69c959ff16aa366a463fd9290864972c0f85d142a [2022-11-19 07:18:35,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:18:35,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:18:35,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:18:35,972 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:18:35,975 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:18:35,977 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2022-11-19 07:18:36,067 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/data/054734a56/210af15aac6f4b0eaa96136d2af86328/FLAG2625522f0 [2022-11-19 07:18:36,688 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:18:36,688 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c [2022-11-19 07:18:36,700 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/data/054734a56/210af15aac6f4b0eaa96136d2af86328/FLAG2625522f0 [2022-11-19 07:18:37,019 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/data/054734a56/210af15aac6f4b0eaa96136d2af86328 [2022-11-19 07:18:37,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:18:37,026 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:18:37,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:18:37,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:18:37,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:18:37,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:18:37" (1/1) ... [2022-11-19 07:18:37,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@663f20d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:37, skipping insertion in model container [2022-11-19 07:18:37,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:18:37" (1/1) ... [2022-11-19 07:18:37,051 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:18:37,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:18:37,392 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2022-11-19 07:18:37,440 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:18:37,481 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-19 07:18:37,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:18:37,508 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2022-11-19 07:18:37,514 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:18:37,524 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:18:37,588 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/sv-benchmarks/c/weaver/popl20-more-buffer-mult2.wvr.c[4099,4112] [2022-11-19 07:18:37,594 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:18:37,613 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:18:37,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:37 WrapperNode [2022-11-19 07:18:37,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:18:37,615 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:18:37,615 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:18:37,616 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:18:37,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:37" (1/1) ... [2022-11-19 07:18:37,648 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:37" (1/1) ... [2022-11-19 07:18:37,707 INFO L138 Inliner]: procedures = 29, calls = 76, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 293 [2022-11-19 07:18:37,708 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:18:37,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:18:37,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:18:37,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:18:37,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:37" (1/1) ... [2022-11-19 07:18:37,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:37" (1/1) ... [2022-11-19 07:18:37,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:37" (1/1) ... [2022-11-19 07:18:37,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:37" (1/1) ... [2022-11-19 07:18:37,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:37" (1/1) ... [2022-11-19 07:18:37,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:37" (1/1) ... [2022-11-19 07:18:37,777 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:37" (1/1) ... [2022-11-19 07:18:37,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:37" (1/1) ... [2022-11-19 07:18:37,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:18:37,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:18:37,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:18:37,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:18:37,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:37" (1/1) ... [2022-11-19 07:18:37,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:18:37,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:18:37,824 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:18:37,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:18:37,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:18:37,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 07:18:37,894 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:18:37,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-19 07:18:37,894 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-19 07:18:37,894 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-19 07:18:37,894 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-19 07:18:37,894 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-19 07:18:37,894 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-19 07:18:37,895 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-19 07:18:37,895 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-19 07:18:37,895 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-19 07:18:37,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-19 07:18:37,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-19 07:18:37,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:18:37,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:18:37,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:18:37,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:18:37,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-19 07:18:37,898 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-19 07:18:38,096 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:18:38,098 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:18:39,002 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:18:39,351 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:18:39,354 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-19 07:18:39,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:18:39 BoogieIcfgContainer [2022-11-19 07:18:39,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:18:39,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:18:39,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:18:39,366 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:18:39,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:18:37" (1/3) ... [2022-11-19 07:18:39,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f42a7bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:18:39, skipping insertion in model container [2022-11-19 07:18:39,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:18:37" (2/3) ... [2022-11-19 07:18:39,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f42a7bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:18:39, skipping insertion in model container [2022-11-19 07:18:39,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:18:39" (3/3) ... [2022-11-19 07:18:39,373 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-mult2.wvr.c [2022-11-19 07:18:39,395 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:18:39,395 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-11-19 07:18:39,395 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-19 07:18:39,555 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-19 07:18:39,619 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-19 07:18:39,635 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 248 places, 253 transitions, 538 flow [2022-11-19 07:18:39,638 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 248 places, 253 transitions, 538 flow [2022-11-19 07:18:39,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 253 transitions, 538 flow [2022-11-19 07:18:39,830 INFO L130 PetriNetUnfolder]: 18/249 cut-off events. [2022-11-19 07:18:39,834 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-19 07:18:39,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 249 events. 18/249 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 219 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 197. Up to 2 conditions per place. [2022-11-19 07:18:39,851 INFO L119 LiptonReduction]: Number of co-enabled transitions 3160 [2022-11-19 07:19:19,448 WARN L233 SmtUtils]: Spent 9.34s on a formula simplification. DAG size of input: 140 DAG size of output: 139 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-19 07:19:27,635 WARN L233 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 146 DAG size of output: 145 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-19 07:19:29,548 INFO L134 LiptonReduction]: Checked pairs total: 5749 [2022-11-19 07:19:29,548 INFO L136 LiptonReduction]: Total number of compositions: 251 [2022-11-19 07:19:29,556 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 76 places, 69 transitions, 170 flow [2022-11-19 07:19:29,934 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 5221 states, 4815 states have (on average 4.821391484942887) internal successors, (23215), 5220 states have internal predecessors, (23215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:29,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:19:29,970 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;@5beb6524, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:19:29,970 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-11-19 07:19:29,992 INFO L276 IsEmpty]: Start isEmpty. Operand has 5221 states, 4815 states have (on average 4.821391484942887) internal successors, (23215), 5220 states have internal predecessors, (23215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:29,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:19:29,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:29,999 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:19:30,000 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:19:30,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:30,009 INFO L85 PathProgramCache]: Analyzing trace with hash 38575, now seen corresponding path program 1 times [2022-11-19 07:19:30,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:19:30,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1979082138] [2022-11-19 07:19:30,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:30,026 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:30,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:19:30,035 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:19:30,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-19 07:19:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:30,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:19:30,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:30,610 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-19 07:19:30,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-19 07:19:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:30,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:19:30,677 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:19:30,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1979082138] [2022-11-19 07:19:30,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1979082138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:19:30,679 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:19:30,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:19:30,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977086099] [2022-11-19 07:19:30,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:19:30,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:19:30,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:19:30,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:19:30,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:19:30,777 INFO L87 Difference]: Start difference. First operand has 5221 states, 4815 states have (on average 4.821391484942887) internal successors, (23215), 5220 states have internal predecessors, (23215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:31,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:31,333 INFO L93 Difference]: Finished difference Result 5218 states and 23212 transitions. [2022-11-19 07:19:31,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:19:31,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 07:19:31,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:31,507 INFO L225 Difference]: With dead ends: 5218 [2022-11-19 07:19:31,507 INFO L226 Difference]: Without dead ends: 5218 [2022-11-19 07:19:31,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:19:31,512 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 59 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:31,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 6 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:19:31,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5218 states. [2022-11-19 07:19:32,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5218 to 5218. [2022-11-19 07:19:32,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5218 states, 4815 states have (on average 4.820768431983385) internal successors, (23212), 5217 states have internal predecessors, (23212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:32,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5218 states to 5218 states and 23212 transitions. [2022-11-19 07:19:32,261 INFO L78 Accepts]: Start accepts. Automaton has 5218 states and 23212 transitions. Word has length 2 [2022-11-19 07:19:32,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:32,266 INFO L495 AbstractCegarLoop]: Abstraction has 5218 states and 23212 transitions. [2022-11-19 07:19:32,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:32,267 INFO L276 IsEmpty]: Start isEmpty. Operand 5218 states and 23212 transitions. [2022-11-19 07:19:32,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-19 07:19:32,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:32,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-19 07:19:32,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-19 07:19:32,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:32,486 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:19:32,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:32,487 INFO L85 PathProgramCache]: Analyzing trace with hash 38576, now seen corresponding path program 1 times [2022-11-19 07:19:32,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:19:32,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744498512] [2022-11-19 07:19:32,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:32,488 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:32,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:19:32,494 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:19:32,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-19 07:19:32,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:32,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:19:32,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:32,988 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:19:32,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:19:33,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:33,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:19:33,050 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:19:33,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744498512] [2022-11-19 07:19:33,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744498512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:19:33,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:19:33,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:19:33,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954266110] [2022-11-19 07:19:33,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:19:33,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:19:33,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:19:33,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:19:33,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:19:33,054 INFO L87 Difference]: Start difference. First operand 5218 states and 23212 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:34,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:34,185 INFO L93 Difference]: Finished difference Result 10433 states and 46421 transitions. [2022-11-19 07:19:34,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:19:34,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-19 07:19:34,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:34,406 INFO L225 Difference]: With dead ends: 10433 [2022-11-19 07:19:34,406 INFO L226 Difference]: Without dead ends: 10433 [2022-11-19 07:19:34,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:19:34,408 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:34,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 12 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:19:34,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10433 states. [2022-11-19 07:19:34,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10433 to 5220. [2022-11-19 07:19:34,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5220 states, 4817 states have (on average 4.820012455885406) internal successors, (23218), 5219 states have internal predecessors, (23218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:35,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5220 states to 5220 states and 23218 transitions. [2022-11-19 07:19:35,003 INFO L78 Accepts]: Start accepts. Automaton has 5220 states and 23218 transitions. Word has length 2 [2022-11-19 07:19:35,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:35,005 INFO L495 AbstractCegarLoop]: Abstraction has 5220 states and 23218 transitions. [2022-11-19 07:19:35,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:35,006 INFO L276 IsEmpty]: Start isEmpty. Operand 5220 states and 23218 transitions. [2022-11-19 07:19:35,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:19:35,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:35,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:19:35,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-19 07:19:35,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:35,221 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:19:35,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:35,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1201494, now seen corresponding path program 1 times [2022-11-19 07:19:35,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:19:35,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [494927270] [2022-11-19 07:19:35,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:35,222 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:35,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:19:35,226 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:19:35,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-19 07:19:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:35,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:19:35,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:35,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:35,822 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-11-19 07:19:35,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2022-11-19 07:19:36,498 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-19 07:19:36,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2022-11-19 07:19:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:36,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:19:36,643 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:19:36,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [494927270] [2022-11-19 07:19:36,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [494927270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:19:36,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:19:36,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:19:36,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924004774] [2022-11-19 07:19:36,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:19:36,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:19:36,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:19:36,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:19:36,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:19:36,646 INFO L87 Difference]: Start difference. First operand 5220 states and 23218 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:37,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:37,001 INFO L93 Difference]: Finished difference Result 5221 states and 23221 transitions. [2022-11-19 07:19:37,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:19:37,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 07:19:37,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:37,053 INFO L225 Difference]: With dead ends: 5221 [2022-11-19 07:19:37,054 INFO L226 Difference]: Without dead ends: 5221 [2022-11-19 07:19:37,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:19:37,056 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:37,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2022-11-19 07:19:37,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5221 states. [2022-11-19 07:19:37,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5221 to 5221. [2022-11-19 07:19:37,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5221 states, 4818 states have (on average 4.819634703196347) internal successors, (23221), 5220 states have internal predecessors, (23221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:37,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5221 states to 5221 states and 23221 transitions. [2022-11-19 07:19:37,487 INFO L78 Accepts]: Start accepts. Automaton has 5221 states and 23221 transitions. Word has length 3 [2022-11-19 07:19:37,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:37,488 INFO L495 AbstractCegarLoop]: Abstraction has 5221 states and 23221 transitions. [2022-11-19 07:19:37,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:37,489 INFO L276 IsEmpty]: Start isEmpty. Operand 5221 states and 23221 transitions. [2022-11-19 07:19:37,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:19:37,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:37,490 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:19:37,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:37,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:37,710 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:19:37,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:37,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1201496, now seen corresponding path program 1 times [2022-11-19 07:19:37,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:19:37,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1189987817] [2022-11-19 07:19:37,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:37,713 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:37,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:19:37,714 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:19:37,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-19 07:19:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:37,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:19:37,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:37,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:37,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:37,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:37,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:37,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:37,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:37,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:38,138 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-19 07:19:38,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 38 [2022-11-19 07:19:38,204 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-11-19 07:19:38,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-11-19 07:19:38,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:38,282 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 [2022-11-19 07:19:38,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:38,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:19:38,321 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:19:38,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1189987817] [2022-11-19 07:19:38,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1189987817] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:19:38,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:19:38,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:19:38,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245215679] [2022-11-19 07:19:38,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:19:38,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:19:38,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:19:38,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:19:38,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:19:38,323 INFO L87 Difference]: Start difference. First operand 5221 states and 23221 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) [2022-11-19 07:19:38,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:38,658 INFO L93 Difference]: Finished difference Result 4320 states and 18718 transitions. [2022-11-19 07:19:38,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:19:38,659 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 [2022-11-19 07:19:38,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:38,691 INFO L225 Difference]: With dead ends: 4320 [2022-11-19 07:19:38,692 INFO L226 Difference]: Without dead ends: 4320 [2022-11-19 07:19:38,692 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 [2022-11-19 07:19:38,693 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 57 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:38,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 6 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-11-19 07:19:38,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4320 states. [2022-11-19 07:19:38,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4320 to 4320. [2022-11-19 07:19:38,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4320 states, 3999 states have (on average 4.680670167541885) internal successors, (18718), 4319 states have internal predecessors, (18718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:38,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4320 states to 4320 states and 18718 transitions. [2022-11-19 07:19:38,876 INFO L78 Accepts]: Start accepts. Automaton has 4320 states and 18718 transitions. Word has length 3 [2022-11-19 07:19:38,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:38,877 INFO L495 AbstractCegarLoop]: Abstraction has 4320 states and 18718 transitions. [2022-11-19 07:19:38,877 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) [2022-11-19 07:19:38,877 INFO L276 IsEmpty]: Start isEmpty. Operand 4320 states and 18718 transitions. [2022-11-19 07:19:38,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:19:38,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:38,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:19:38,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:39,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:39,091 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:19:39,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:39,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1199929, now seen corresponding path program 1 times [2022-11-19 07:19:39,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:19:39,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276570557] [2022-11-19 07:19:39,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:39,093 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:39,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:19:39,094 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:19:39,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-19 07:19:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:39,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:19:39,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:39,546 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:19:39,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:19:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:39,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:19:39,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:39,935 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:19:39,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276570557] [2022-11-19 07:19:39,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276570557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:19:39,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1433260210] [2022-11-19 07:19:39,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:39,936 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:19:39,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:19:39,940 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:19:39,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-19 07:19:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:40,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 07:19:40,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:40,387 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:19:40,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:19:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:40,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:19:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:40,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1433260210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:19:40,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195908350] [2022-11-19 07:19:40,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:40,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:19:40,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:19:40,554 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:19:40,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:19:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:40,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:19:40,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:40,946 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:19:40,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:19:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:41,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:19:41,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:41,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195908350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:19:41,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:19:41,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-19 07:19:41,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601991553] [2022-11-19 07:19:41,186 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:19:41,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:19:41,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:19:41,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:19:41,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:19:41,188 INFO L87 Difference]: Start difference. First operand 4320 states and 18718 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:44,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:44,021 INFO L93 Difference]: Finished difference Result 17262 states and 74842 transitions. [2022-11-19 07:19:44,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:19:44,023 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-19 07:19:44,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:44,167 INFO L225 Difference]: With dead ends: 17262 [2022-11-19 07:19:44,168 INFO L226 Difference]: Without dead ends: 17262 [2022-11-19 07:19:44,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:19:44,169 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 687 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:44,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 30 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-19 07:19:44,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17262 states. [2022-11-19 07:19:44,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17262 to 4326. [2022-11-19 07:19:44,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4326 states, 4005 states have (on average 4.677403245942572) internal successors, (18733), 4325 states have internal predecessors, (18733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:44,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4326 states to 4326 states and 18733 transitions. [2022-11-19 07:19:44,592 INFO L78 Accepts]: Start accepts. Automaton has 4326 states and 18733 transitions. Word has length 3 [2022-11-19 07:19:44,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:44,592 INFO L495 AbstractCegarLoop]: Abstraction has 4326 states and 18733 transitions. [2022-11-19 07:19:44,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:44,593 INFO L276 IsEmpty]: Start isEmpty. Operand 4326 states and 18733 transitions. [2022-11-19 07:19:44,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 07:19:44,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:44,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 07:19:44,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:44,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:45,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:45,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:45,198 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:19:45,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:45,198 INFO L85 PathProgramCache]: Analyzing trace with hash 37246868, now seen corresponding path program 1 times [2022-11-19 07:19:45,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:19:45,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281121234] [2022-11-19 07:19:45,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:45,199 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:45,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:19:45,200 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:19:45,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-19 07:19:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:45,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:19:45,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:45,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:45,614 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-11-19 07:19:45,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2022-11-19 07:19:46,095 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-19 07:19:46,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2022-11-19 07:19:46,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:19:46,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:19:46,216 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:19:46,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281121234] [2022-11-19 07:19:46,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281121234] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:19:46,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:19:46,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:19:46,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769781774] [2022-11-19 07:19:46,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:19:46,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:19:46,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:19:46,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:19:46,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:19:46,218 INFO L87 Difference]: Start difference. First operand 4326 states and 18733 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:46,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:46,450 INFO L93 Difference]: Finished difference Result 4330 states and 18742 transitions. [2022-11-19 07:19:46,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:19:46,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 07:19:46,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:46,476 INFO L225 Difference]: With dead ends: 4330 [2022-11-19 07:19:46,476 INFO L226 Difference]: Without dead ends: 4330 [2022-11-19 07:19:46,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:19:46,477 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:46,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2022-11-19 07:19:46,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4330 states. [2022-11-19 07:19:46,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4330 to 4330. [2022-11-19 07:19:46,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4330 states, 4009 states have (on average 4.674981292092792) internal successors, (18742), 4329 states have internal predecessors, (18742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:46,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4330 states to 4330 states and 18742 transitions. [2022-11-19 07:19:46,637 INFO L78 Accepts]: Start accepts. Automaton has 4330 states and 18742 transitions. Word has length 4 [2022-11-19 07:19:46,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:46,638 INFO L495 AbstractCegarLoop]: Abstraction has 4330 states and 18742 transitions. [2022-11-19 07:19:46,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:46,638 INFO L276 IsEmpty]: Start isEmpty. Operand 4330 states and 18742 transitions. [2022-11-19 07:19:46,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 07:19:46,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:46,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 07:19:46,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:46,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:46,840 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:19:46,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:46,841 INFO L85 PathProgramCache]: Analyzing trace with hash 37203437, now seen corresponding path program 1 times [2022-11-19 07:19:46,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:19:46,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1518093763] [2022-11-19 07:19:46,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:46,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:46,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:19:46,843 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:19:46,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:19:46,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:46,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:19:46,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:47,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:47,138 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-11-19 07:19:47,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2022-11-19 07:19:48,540 INFO L321 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2022-11-19 07:19:48,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2022-11-19 07:19:48,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:19:48,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:19:48,788 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:19:48,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1518093763] [2022-11-19 07:19:48,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1518093763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:19:48,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:19:48,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:19:48,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648974819] [2022-11-19 07:19:48,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:19:48,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:19:48,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:19:48,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:19:48,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:19:48,790 INFO L87 Difference]: Start difference. First operand 4330 states and 18742 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:49,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:49,035 INFO L93 Difference]: Finished difference Result 4330 states and 18741 transitions. [2022-11-19 07:19:49,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:19:49,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 07:19:49,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:49,068 INFO L225 Difference]: With dead ends: 4330 [2022-11-19 07:19:49,068 INFO L226 Difference]: Without dead ends: 4330 [2022-11-19 07:19:49,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:19:49,070 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:49,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2022-11-19 07:19:49,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4330 states. [2022-11-19 07:19:49,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4330 to 4330. [2022-11-19 07:19:49,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4330 states, 4009 states have (on average 4.674731853330007) internal successors, (18741), 4329 states have internal predecessors, (18741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:49,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4330 states to 4330 states and 18741 transitions. [2022-11-19 07:19:49,282 INFO L78 Accepts]: Start accepts. Automaton has 4330 states and 18741 transitions. Word has length 4 [2022-11-19 07:19:49,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:49,282 INFO L495 AbstractCegarLoop]: Abstraction has 4330 states and 18741 transitions. [2022-11-19 07:19:49,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:49,283 INFO L276 IsEmpty]: Start isEmpty. Operand 4330 states and 18741 transitions. [2022-11-19 07:19:49,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:19:49,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:49,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 07:19:49,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:19:49,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:49,497 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:19:49,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:49,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1154666291, now seen corresponding path program 1 times [2022-11-19 07:19:49,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:19:49,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1547733251] [2022-11-19 07:19:49,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:49,498 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:49,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:19:49,500 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:19:49,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:19:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:49,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:19:49,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:49,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:49,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:49,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:49,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:49,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:49,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:49,917 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-11-19 07:19:49,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 41 [2022-11-19 07:19:49,970 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-19 07:19:49,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2022-11-19 07:19:50,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:50,048 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 [2022-11-19 07:19:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:50,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:19:50,118 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:19:50,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1547733251] [2022-11-19 07:19:50,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1547733251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:19:50,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:19:50,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:19:50,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601667785] [2022-11-19 07:19:50,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:19:50,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:19:50,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:19:50,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:19:50,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:19:50,121 INFO L87 Difference]: Start difference. First operand 4330 states and 18741 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) [2022-11-19 07:19:50,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:50,440 INFO L93 Difference]: Finished difference Result 4145 states and 18011 transitions. [2022-11-19 07:19:50,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:19:50,441 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 [2022-11-19 07:19:50,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:50,462 INFO L225 Difference]: With dead ends: 4145 [2022-11-19 07:19:50,462 INFO L226 Difference]: Without dead ends: 4145 [2022-11-19 07:19:50,462 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 [2022-11-19 07:19:50,463 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:50,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 6 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-11-19 07:19:50,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4145 states. [2022-11-19 07:19:50,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4145 to 4145. [2022-11-19 07:19:50,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4145 states, 3854 states have (on average 4.673326414115205) internal successors, (18011), 4144 states have internal predecessors, (18011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:50,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4145 states to 4145 states and 18011 transitions. [2022-11-19 07:19:50,666 INFO L78 Accepts]: Start accepts. Automaton has 4145 states and 18011 transitions. Word has length 5 [2022-11-19 07:19:50,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:50,667 INFO L495 AbstractCegarLoop]: Abstraction has 4145 states and 18011 transitions. [2022-11-19 07:19:50,667 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) [2022-11-19 07:19:50,667 INFO L276 IsEmpty]: Start isEmpty. Operand 4145 states and 18011 transitions. [2022-11-19 07:19:50,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:19:50,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:50,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 07:19:50,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:19:50,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:50,881 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:19:50,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:50,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1154666293, now seen corresponding path program 1 times [2022-11-19 07:19:50,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:19:50,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2032196992] [2022-11-19 07:19:50,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:50,882 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 [2022-11-19 07:19:50,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:19:50,884 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:19:50,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-19 07:19:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:51,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:19:51,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:51,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:51,215 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-19 07:19:51,216 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 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-19 07:19:52,446 INFO L321 Elim1Store]: treesize reduction 58, result has 27.5 percent of original size [2022-11-19 07:19:52,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 44 [2022-11-19 07:19:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:52,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:19:52,715 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:19:52,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2032196992] [2022-11-19 07:19:52,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2032196992] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:19:52,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:19:52,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:19:52,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454369603] [2022-11-19 07:19:52,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:19:52,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:19:52,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:19:52,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:19:52,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:19:52,716 INFO L87 Difference]: Start difference. First operand 4145 states and 18011 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:52,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:52,952 INFO L93 Difference]: Finished difference Result 4148 states and 18019 transitions. [2022-11-19 07:19:52,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:19:52,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 07:19:52,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:52,976 INFO L225 Difference]: With dead ends: 4148 [2022-11-19 07:19:52,976 INFO L226 Difference]: Without dead ends: 4148 [2022-11-19 07:19:52,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:19:52,978 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:52,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-11-19 07:19:52,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4148 states. [2022-11-19 07:19:53,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4148 to 4148. [2022-11-19 07:19:53,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4148 states, 3857 states have (on average 4.671765620948924) internal successors, (18019), 4147 states have internal predecessors, (18019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4148 states to 4148 states and 18019 transitions. [2022-11-19 07:19:53,132 INFO L78 Accepts]: Start accepts. Automaton has 4148 states and 18019 transitions. Word has length 5 [2022-11-19 07:19:53,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:53,134 INFO L495 AbstractCegarLoop]: Abstraction has 4148 states and 18019 transitions. [2022-11-19 07:19:53,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:53,134 INFO L276 IsEmpty]: Start isEmpty. Operand 4148 states and 18019 transitions. [2022-11-19 07:19:53,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:19:53,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:53,135 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 07:19:53,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:53,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:53,349 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:19:53,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:53,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1153307101, now seen corresponding path program 1 times [2022-11-19 07:19:53,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:19:53,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [804878801] [2022-11-19 07:19:53,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:53,350 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:53,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:19:53,352 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:19:53,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-19 07:19:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:53,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:19:53,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:53,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:53,780 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-11-19 07:19:53,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2022-11-19 07:19:55,124 INFO L321 Elim1Store]: treesize reduction 48, result has 31.4 percent of original size [2022-11-19 07:19:55,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2022-11-19 07:19:55,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:19:55,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:19:55,477 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:19:55,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [804878801] [2022-11-19 07:19:55,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [804878801] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:19:55,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:19:55,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:19:55,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293503454] [2022-11-19 07:19:55,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:19:55,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:19:55,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:19:55,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:19:55,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:19:55,479 INFO L87 Difference]: Start difference. First operand 4148 states and 18019 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:55,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:55,706 INFO L93 Difference]: Finished difference Result 4147 states and 18015 transitions. [2022-11-19 07:19:55,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:19:55,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 07:19:55,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:55,730 INFO L225 Difference]: With dead ends: 4147 [2022-11-19 07:19:55,730 INFO L226 Difference]: Without dead ends: 4147 [2022-11-19 07:19:55,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:19:55,731 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:55,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-11-19 07:19:55,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4147 states. [2022-11-19 07:19:55,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4147 to 4143. [2022-11-19 07:19:55,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4143 states, 3853 states have (on average 4.67324162989878) internal successors, (18006), 4142 states have internal predecessors, (18006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:55,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4143 states to 4143 states and 18006 transitions. [2022-11-19 07:19:55,884 INFO L78 Accepts]: Start accepts. Automaton has 4143 states and 18006 transitions. Word has length 5 [2022-11-19 07:19:55,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:55,884 INFO L495 AbstractCegarLoop]: Abstraction has 4143 states and 18006 transitions. [2022-11-19 07:19:55,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:55,885 INFO L276 IsEmpty]: Start isEmpty. Operand 4143 states and 18006 transitions. [2022-11-19 07:19:55,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:19:55,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:55,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:19:55,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:56,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:56,101 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:19:56,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:56,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1434532339, now seen corresponding path program 1 times [2022-11-19 07:19:56,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:19:56,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1689069021] [2022-11-19 07:19:56,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:56,102 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:56,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:19:56,103 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:19:56,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-19 07:19:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:56,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:19:56,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:56,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:19:56,447 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-19 07:19:56,448 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 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-19 07:19:57,497 INFO L321 Elim1Store]: treesize reduction 58, result has 27.5 percent of original size [2022-11-19 07:19:57,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 44 [2022-11-19 07:19:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:19:57,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:19:57,905 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:19:57,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1689069021] [2022-11-19 07:19:57,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1689069021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:19:57,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:19:57,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:19:57,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588022209] [2022-11-19 07:19:57,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:19:57,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:19:57,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:19:57,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:19:57,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:19:57,907 INFO L87 Difference]: Start difference. First operand 4143 states and 18006 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:58,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:58,082 INFO L93 Difference]: Finished difference Result 4150 states and 18023 transitions. [2022-11-19 07:19:58,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:19:58,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:19:58,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:58,098 INFO L225 Difference]: With dead ends: 4150 [2022-11-19 07:19:58,098 INFO L226 Difference]: Without dead ends: 4150 [2022-11-19 07:19:58,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:19:58,099 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:58,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-11-19 07:19:58,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2022-11-19 07:19:58,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 4147. [2022-11-19 07:19:58,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4147 states, 3857 states have (on average 4.670728545501685) internal successors, (18015), 4146 states have internal predecessors, (18015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:58,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4147 states to 4147 states and 18015 transitions. [2022-11-19 07:19:58,290 INFO L78 Accepts]: Start accepts. Automaton has 4147 states and 18015 transitions. Word has length 6 [2022-11-19 07:19:58,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:58,290 INFO L495 AbstractCegarLoop]: Abstraction has 4147 states and 18015 transitions. [2022-11-19 07:19:58,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:58,290 INFO L276 IsEmpty]: Start isEmpty. Operand 4147 states and 18015 transitions. [2022-11-19 07:19:58,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:19:58,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:58,292 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:19:58,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:58,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:58,505 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:19:58,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:58,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1434910490, now seen corresponding path program 1 times [2022-11-19 07:19:58,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:19:58,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996845760] [2022-11-19 07:19:58,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:58,507 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:58,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:19:58,508 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:19:58,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-19 07:19:58,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:58,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:19:58,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:58,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:58,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:19:58,676 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:19:58,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996845760] [2022-11-19 07:19:58,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996845760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:19:58,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:19:58,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:19:58,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791229889] [2022-11-19 07:19:58,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:19:58,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:19:58,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:19:58,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:19:58,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:19:58,679 INFO L87 Difference]: Start difference. First operand 4147 states and 18015 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:59,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:59,240 INFO L93 Difference]: Finished difference Result 5571 states and 23251 transitions. [2022-11-19 07:19:59,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:19:59,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:19:59,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:59,265 INFO L225 Difference]: With dead ends: 5571 [2022-11-19 07:19:59,265 INFO L226 Difference]: Without dead ends: 5571 [2022-11-19 07:19:59,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:19:59,266 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:59,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 18 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:19:59,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5571 states. [2022-11-19 07:19:59,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5571 to 5309. [2022-11-19 07:19:59,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5309 states, 5019 states have (on average 4.501494321578003) internal successors, (22593), 5308 states have internal predecessors, (22593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:59,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5309 states to 5309 states and 22593 transitions. [2022-11-19 07:19:59,465 INFO L78 Accepts]: Start accepts. Automaton has 5309 states and 22593 transitions. Word has length 6 [2022-11-19 07:19:59,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:59,465 INFO L495 AbstractCegarLoop]: Abstraction has 5309 states and 22593 transitions. [2022-11-19 07:19:59,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:19:59,466 INFO L276 IsEmpty]: Start isEmpty. Operand 5309 states and 22593 transitions. [2022-11-19 07:19:59,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:19:59,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:59,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:19:59,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:59,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:59,680 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:19:59,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:59,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1392795148, now seen corresponding path program 1 times [2022-11-19 07:19:59,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:19:59,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896680094] [2022-11-19 07:19:59,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:59,681 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:19:59,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:19:59,682 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:19:59,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-19 07:19:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:59,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:19:59,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:59,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:00,006 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-19 07:20:00,007 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 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-19 07:20:00,447 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-19 07:20:00,447 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 [2022-11-19 07:20:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:20:00,570 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:20:00,570 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:20:00,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896680094] [2022-11-19 07:20:00,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896680094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:20:00,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:20:00,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:20:00,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711584654] [2022-11-19 07:20:00,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:20:00,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:20:00,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:20:00,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:20:00,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:20:00,572 INFO L87 Difference]: Start difference. First operand 5309 states and 22593 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:20:00,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:00,767 INFO L93 Difference]: Finished difference Result 5315 states and 22606 transitions. [2022-11-19 07:20:00,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:20:00,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:20:00,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:00,790 INFO L225 Difference]: With dead ends: 5315 [2022-11-19 07:20:00,790 INFO L226 Difference]: Without dead ends: 5315 [2022-11-19 07:20:00,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:20:00,791 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:00,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-11-19 07:20:00,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5315 states. [2022-11-19 07:20:00,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5315 to 5312. [2022-11-19 07:20:00,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5312 states, 5022 states have (on average 4.500398247710075) internal successors, (22601), 5311 states have internal predecessors, (22601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:20:00,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5312 states to 5312 states and 22601 transitions. [2022-11-19 07:20:00,978 INFO L78 Accepts]: Start accepts. Automaton has 5312 states and 22601 transitions. Word has length 6 [2022-11-19 07:20:00,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:00,978 INFO L495 AbstractCegarLoop]: Abstraction has 5312 states and 22601 transitions. [2022-11-19 07:20:00,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:20:00,978 INFO L276 IsEmpty]: Start isEmpty. Operand 5312 states and 22601 transitions. [2022-11-19 07:20:00,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:20:00,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:00,979 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-19 07:20:00,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-11-19 07:20:01,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:20:01,192 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:20:01,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:01,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1391390960, now seen corresponding path program 2 times [2022-11-19 07:20:01,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:20:01,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615535342] [2022-11-19 07:20:01,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:20:01,194 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:20:01,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:20:01,195 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:20:01,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-19 07:20:01,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:20:01,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:20:01,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:20:01,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:01,613 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:20:01,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:20:01,791 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:20:01,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:20:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:20:02,477 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:20:02,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615535342] [2022-11-19 07:20:02,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615535342] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:20:02,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1638787317] [2022-11-19 07:20:02,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:20:02,478 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:20:02,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:20:02,480 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:20:02,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-19 07:20:02,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:20:02,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:20:02,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:20:02,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:03,046 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:20:03,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:20:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:20:03,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:20:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:20:04,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1638787317] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:20:04,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686885261] [2022-11-19 07:20:04,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:20:04,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:20:04,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:20:04,260 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:20:04,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 07:20:04,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:20:04,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:20:04,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:20:04,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:04,685 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:20:04,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:20:04,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:20:04,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:20:04,986 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:20:04,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686885261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:20:04,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:20:04,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-19 07:20:04,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276899953] [2022-11-19 07:20:04,987 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:20:04,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 07:20:04,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:20:04,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 07:20:04,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:20:04,988 INFO L87 Difference]: Start difference. First operand 5312 states and 22601 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:20:08,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:09,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:11,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:12,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:14,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:16,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:18,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:20,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:22,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:23,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:25,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:28,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:29,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:30,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:20:41,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:41,379 INFO L93 Difference]: Finished difference Result 52946 states and 225663 transitions. [2022-11-19 07:20:41,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 07:20:41,380 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:20:41,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:41,715 INFO L225 Difference]: With dead ends: 52946 [2022-11-19 07:20:41,716 INFO L226 Difference]: Without dead ends: 52946 [2022-11-19 07:20:41,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2022-11-19 07:20:41,717 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2100 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 1799 mSolverCounterSat, 79 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2100 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1799 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:41,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2100 Valid, 228 Invalid, 1881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1799 Invalid, 3 Unknown, 0 Unchecked, 33.2s Time] [2022-11-19 07:20:41,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52946 states. [2022-11-19 07:20:42,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52946 to 5330. [2022-11-19 07:20:42,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5330 states, 5040 states have (on average 4.491468253968254) internal successors, (22637), 5329 states have internal predecessors, (22637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:20:42,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5330 states to 5330 states and 22637 transitions. [2022-11-19 07:20:42,370 INFO L78 Accepts]: Start accepts. Automaton has 5330 states and 22637 transitions. Word has length 6 [2022-11-19 07:20:42,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:42,371 INFO L495 AbstractCegarLoop]: Abstraction has 5330 states and 22637 transitions. [2022-11-19 07:20:42,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:20:42,371 INFO L276 IsEmpty]: Start isEmpty. Operand 5330 states and 22637 transitions. [2022-11-19 07:20:42,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:20:42,372 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:42,372 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:42,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:20:42,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 07:20:42,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:20:42,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:20:42,984 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:20:42,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:42,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1532773993, now seen corresponding path program 1 times [2022-11-19 07:20:42,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:20:42,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [114508481] [2022-11-19 07:20:42,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:42,985 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:20:42,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:20:42,986 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:20:42,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-19 07:20:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:43,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:20:43,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:43,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:43,315 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-19 07:20:43,316 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-19 07:20:43,974 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-19 07:20:43,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-19 07:20:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:20:44,240 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:20:44,240 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:20:44,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [114508481] [2022-11-19 07:20:44,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [114508481] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:20:44,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:20:44,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:20:44,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818927056] [2022-11-19 07:20:44,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:20:44,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:20:44,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:20:44,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:20:44,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:20:44,243 INFO L87 Difference]: Start difference. First operand 5330 states and 22637 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:20:44,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:44,448 INFO L93 Difference]: Finished difference Result 5339 states and 22668 transitions. [2022-11-19 07:20:44,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:20:44,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:20:44,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:44,471 INFO L225 Difference]: With dead ends: 5339 [2022-11-19 07:20:44,471 INFO L226 Difference]: Without dead ends: 5339 [2022-11-19 07:20:44,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:20:44,472 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:44,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-11-19 07:20:44,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5339 states. [2022-11-19 07:20:44,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5339 to 5339. [2022-11-19 07:20:44,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5339 states, 5049 states have (on average 4.4896019013666075) internal successors, (22668), 5338 states have internal predecessors, (22668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:20:44,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5339 states to 5339 states and 22668 transitions. [2022-11-19 07:20:44,708 INFO L78 Accepts]: Start accepts. Automaton has 5339 states and 22668 transitions. Word has length 7 [2022-11-19 07:20:44,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:44,709 INFO L495 AbstractCegarLoop]: Abstraction has 5339 states and 22668 transitions. [2022-11-19 07:20:44,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:20:44,710 INFO L276 IsEmpty]: Start isEmpty. Operand 5339 states and 22668 transitions. [2022-11-19 07:20:44,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:20:44,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:44,713 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:44,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-19 07:20:44,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:20:44,930 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:20:44,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:44,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1532773994, now seen corresponding path program 1 times [2022-11-19 07:20:44,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:20:44,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735575089] [2022-11-19 07:20:44,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:44,931 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:20:44,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:20:44,933 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:20:44,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:20:45,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:45,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:20:45,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:45,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:45,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:45,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:45,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:45,305 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-19 07:20:45,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 47 [2022-11-19 07:20:45,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-19 07:20:45,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:45,395 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 [2022-11-19 07:20:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:20:45,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:20:45,484 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:20:45,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [735575089] [2022-11-19 07:20:45,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [735575089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:20:45,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:20:45,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:20:45,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501584355] [2022-11-19 07:20:45,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:20:45,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:20:45,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:20:45,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:20:45,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:20:45,487 INFO L87 Difference]: Start difference. First operand 5339 states and 22668 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) [2022-11-19 07:20:45,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:45,802 INFO L93 Difference]: Finished difference Result 5256 states and 22410 transitions. [2022-11-19 07:20:45,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:20:45,803 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 [2022-11-19 07:20:45,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:45,833 INFO L225 Difference]: With dead ends: 5256 [2022-11-19 07:20:45,833 INFO L226 Difference]: Without dead ends: 5256 [2022-11-19 07:20:45,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:20:45,834 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:45,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 6 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 1 Unchecked, 0.3s Time] [2022-11-19 07:20:45,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5256 states. [2022-11-19 07:20:45,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5256 to 5256. [2022-11-19 07:20:45,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5256 states, 4984 states have (on average 4.496388443017657) internal successors, (22410), 5255 states have internal predecessors, (22410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:20:46,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5256 states to 5256 states and 22410 transitions. [2022-11-19 07:20:46,009 INFO L78 Accepts]: Start accepts. Automaton has 5256 states and 22410 transitions. Word has length 7 [2022-11-19 07:20:46,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:46,009 INFO L495 AbstractCegarLoop]: Abstraction has 5256 states and 22410 transitions. [2022-11-19 07:20:46,009 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) [2022-11-19 07:20:46,009 INFO L276 IsEmpty]: Start isEmpty. Operand 5256 states and 22410 transitions. [2022-11-19 07:20:46,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:20:46,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:46,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:46,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:20:46,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:20:46,215 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:20:46,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:46,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1532558330, now seen corresponding path program 1 times [2022-11-19 07:20:46,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:20:46,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1963086993] [2022-11-19 07:20:46,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:46,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:20:46,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:20:46,218 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:20:46,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-19 07:20:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:46,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:20:46,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:46,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:46,549 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-19 07:20:46,550 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 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-19 07:20:46,965 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-19 07:20:46,967 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 [2022-11-19 07:20:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:20:47,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:20:47,191 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:20:47,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1963086993] [2022-11-19 07:20:47,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1963086993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:20:47,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:20:47,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:20:47,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730393927] [2022-11-19 07:20:47,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:20:47,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:20:47,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:20:47,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:20:47,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:20:47,193 INFO L87 Difference]: Start difference. First operand 5256 states and 22410 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:20:47,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:47,420 INFO L93 Difference]: Finished difference Result 5257 states and 22411 transitions. [2022-11-19 07:20:47,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:20:47,420 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:20:47,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:47,447 INFO L225 Difference]: With dead ends: 5257 [2022-11-19 07:20:47,447 INFO L226 Difference]: Without dead ends: 5257 [2022-11-19 07:20:47,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:20:47,448 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:47,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-11-19 07:20:47,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5257 states. [2022-11-19 07:20:47,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5257 to 5257. [2022-11-19 07:20:47,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5257 states, 4985 states have (on average 4.495687061183551) internal successors, (22411), 5256 states have internal predecessors, (22411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:20:47,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 22411 transitions. [2022-11-19 07:20:47,590 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 22411 transitions. Word has length 7 [2022-11-19 07:20:47,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:47,590 INFO L495 AbstractCegarLoop]: Abstraction has 5257 states and 22411 transitions. [2022-11-19 07:20:47,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:20:47,591 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 22411 transitions. [2022-11-19 07:20:47,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:20:47,592 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:47,592 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:47,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-19 07:20:47,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:20:47,807 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:20:47,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:47,807 INFO L85 PathProgramCache]: Analyzing trace with hash 226592252, now seen corresponding path program 1 times [2022-11-19 07:20:47,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:20:47,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418579278] [2022-11-19 07:20:47,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:47,808 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 [2022-11-19 07:20:47,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:20:47,809 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:20:47,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-19 07:20:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:48,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:20:48,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:48,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:48,223 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-19 07:20:48,223 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 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-19 07:20:48,658 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-19 07:20:48,659 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 [2022-11-19 07:20:48,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:20:48,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:20:48,800 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:20:48,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418579278] [2022-11-19 07:20:48,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418579278] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:20:48,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:20:48,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:20:48,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241333274] [2022-11-19 07:20:48,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:20:48,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:20:48,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:20:48,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:20:48,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:20:48,803 INFO L87 Difference]: Start difference. First operand 5257 states and 22411 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:20:49,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:49,008 INFO L93 Difference]: Finished difference Result 5257 states and 22414 transitions. [2022-11-19 07:20:49,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:20:49,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:20:49,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:49,035 INFO L225 Difference]: With dead ends: 5257 [2022-11-19 07:20:49,035 INFO L226 Difference]: Without dead ends: 5257 [2022-11-19 07:20:49,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:20:49,037 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:49,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-11-19 07:20:49,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5257 states. [2022-11-19 07:20:49,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5257 to 5254. [2022-11-19 07:20:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5254 states, 4982 states have (on average 4.497390606182256) internal successors, (22406), 5253 states have internal predecessors, (22406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:20:49,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5254 states to 5254 states and 22406 transitions. [2022-11-19 07:20:49,195 INFO L78 Accepts]: Start accepts. Automaton has 5254 states and 22406 transitions. Word has length 7 [2022-11-19 07:20:49,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:49,196 INFO L495 AbstractCegarLoop]: Abstraction has 5254 states and 22406 transitions. [2022-11-19 07:20:49,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:20:49,196 INFO L276 IsEmpty]: Start isEmpty. Operand 5254 states and 22406 transitions. [2022-11-19 07:20:49,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:20:49,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:49,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:49,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-19 07:20:49,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:20:49,412 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:20:49,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:49,412 INFO L85 PathProgramCache]: Analyzing trace with hash 226970403, now seen corresponding path program 1 times [2022-11-19 07:20:49,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:20:49,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491545163] [2022-11-19 07:20:49,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:49,413 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:20:49,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:20:49,414 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:20:49,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-19 07:20:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:49,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:20:49,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:49,774 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-19 07:20:49,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-19 07:20:49,803 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:20:49,803 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 [2022-11-19 07:20:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:20:49,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:20:49,825 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:20:49,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491545163] [2022-11-19 07:20:49,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491545163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:20:49,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:20:49,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:20:49,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998612546] [2022-11-19 07:20:49,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:20:49,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:20:49,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:20:49,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:20:49,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:20:49,827 INFO L87 Difference]: Start difference. First operand 5254 states and 22406 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) [2022-11-19 07:20:50,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:50,100 INFO L93 Difference]: Finished difference Result 4028 states and 16940 transitions. [2022-11-19 07:20:50,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:20:50,101 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 [2022-11-19 07:20:50,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:50,115 INFO L225 Difference]: With dead ends: 4028 [2022-11-19 07:20:50,115 INFO L226 Difference]: Without dead ends: 4028 [2022-11-19 07:20:50,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:20:50,116 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 94 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:50,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 6 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:20:50,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4028 states. [2022-11-19 07:20:50,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4028 to 4028. [2022-11-19 07:20:50,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4028 states, 3892 states have (on average 4.35251798561151) internal successors, (16940), 4027 states have internal predecessors, (16940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:20:50,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 16940 transitions. [2022-11-19 07:20:50,203 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 16940 transitions. Word has length 7 [2022-11-19 07:20:50,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:50,203 INFO L495 AbstractCegarLoop]: Abstraction has 4028 states and 16940 transitions. [2022-11-19 07:20:50,203 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) [2022-11-19 07:20:50,204 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 16940 transitions. [2022-11-19 07:20:50,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:20:50,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:50,204 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:50,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-19 07:20:50,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:20:50,407 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:20:50,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:50,408 INFO L85 PathProgramCache]: Analyzing trace with hash 226970404, now seen corresponding path program 1 times [2022-11-19 07:20:50,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:20:50,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2060375736] [2022-11-19 07:20:50,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:50,409 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:20:50,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:20:50,410 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:20:50,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:20:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:50,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:20:50,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:50,855 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:20:50,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:20:51,151 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-19 07:20:51,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-19 07:20:51,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:51,359 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 [2022-11-19 07:20:51,378 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:20:51,378 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 [2022-11-19 07:20:51,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:20:51,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:20:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:20:55,548 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:20:55,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2060375736] [2022-11-19 07:20:55,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2060375736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:20:55,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1901326953] [2022-11-19 07:20:55,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:55,549 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:20:55,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:20:55,550 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:20:55,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-19 07:20:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:55,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:20:55,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:56,274 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:20:56,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:20:56,611 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-19 07:20:56,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-19 07:20:56,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:20:56,918 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 [2022-11-19 07:20:56,934 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:20:56,934 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 [2022-11-19 07:20:56,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:20:56,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:21:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:21:09,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1901326953] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:21:09,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798806302] [2022-11-19 07:21:09,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:21:09,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:21:09,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:21:09,915 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:21:09,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-19 07:21:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:21:10,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:21:10,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:21:10,469 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:21:10,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:21:10,839 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-19 07:21:10,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-19 07:21:11,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:11,044 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 [2022-11-19 07:21:11,065 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:21:11,066 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 [2022-11-19 07:21:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:21:11,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:21:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:21:23,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798806302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:21:23,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:21:23,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 11 [2022-11-19 07:21:23,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532259814] [2022-11-19 07:21:23,856 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:21:23,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:21:23,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:21:23,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:21:23,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=102, Unknown=7, NotChecked=0, Total=156 [2022-11-19 07:21:23,857 INFO L87 Difference]: Start difference. First operand 4028 states and 16940 transitions. Second operand has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:21:34,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:21:34,031 INFO L93 Difference]: Finished difference Result 4040 states and 16968 transitions. [2022-11-19 07:21:34,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:21:34,032 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:21:34,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:21:34,055 INFO L225 Difference]: With dead ends: 4040 [2022-11-19 07:21:34,055 INFO L226 Difference]: Without dead ends: 4040 [2022-11-19 07:21:34,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 38.3s TimeCoverageRelationStatistics Valid=56, Invalid=116, Unknown=10, NotChecked=0, Total=182 [2022-11-19 07:21:34,056 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:21:34,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 54 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 140 Unchecked, 0.4s Time] [2022-11-19 07:21:34,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4040 states. [2022-11-19 07:21:34,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4040 to 4034. [2022-11-19 07:21:34,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4034 states, 3898 states have (on average 4.349409953822473) internal successors, (16954), 4033 states have internal predecessors, (16954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:21:34,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4034 states to 4034 states and 16954 transitions. [2022-11-19 07:21:34,194 INFO L78 Accepts]: Start accepts. Automaton has 4034 states and 16954 transitions. Word has length 7 [2022-11-19 07:21:34,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:21:34,194 INFO L495 AbstractCegarLoop]: Abstraction has 4034 states and 16954 transitions. [2022-11-19 07:21:34,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:21:34,195 INFO L276 IsEmpty]: Start isEmpty. Operand 4034 states and 16954 transitions. [2022-11-19 07:21:34,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:21:34,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:21:34,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:21:34,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-19 07:21:34,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-19 07:21:34,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:21:34,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:21:34,806 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:21:34,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:21:34,807 INFO L85 PathProgramCache]: Analyzing trace with hash -98895449, now seen corresponding path program 1 times [2022-11-19 07:21:34,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:21:34,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1568608417] [2022-11-19 07:21:34,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:21:34,807 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:21:34,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:21:34,808 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:21:34,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-19 07:21:35,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:21:35,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:21:35,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:21:35,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:35,251 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-19 07:21:35,252 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-19 07:21:35,391 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:21:35,391 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 [2022-11-19 07:21:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:21:35,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:21:35,474 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:21:35,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1568608417] [2022-11-19 07:21:35,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1568608417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:21:35,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:21:35,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:21:35,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748314161] [2022-11-19 07:21:35,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:21:35,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:21:35,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:21:35,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:21:35,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:21:35,475 INFO L87 Difference]: Start difference. First operand 4034 states and 16954 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:21:35,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:21:35,670 INFO L93 Difference]: Finished difference Result 4034 states and 16960 transitions. [2022-11-19 07:21:35,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:21:35,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 07:21:35,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:21:35,685 INFO L225 Difference]: With dead ends: 4034 [2022-11-19 07:21:35,685 INFO L226 Difference]: Without dead ends: 4034 [2022-11-19 07:21:35,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:21:35,686 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:21:35,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-11-19 07:21:35,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4034 states. [2022-11-19 07:21:35,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4034 to 4028. [2022-11-19 07:21:35,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4028 states, 3892 states have (on average 4.3520041109969165) internal successors, (16938), 4027 states have internal predecessors, (16938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:21:35,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 16938 transitions. [2022-11-19 07:21:35,777 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 16938 transitions. Word has length 8 [2022-11-19 07:21:35,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:21:35,777 INFO L495 AbstractCegarLoop]: Abstraction has 4028 states and 16938 transitions. [2022-11-19 07:21:35,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:21:35,778 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 16938 transitions. [2022-11-19 07:21:35,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:21:35,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:21:35,779 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:21:35,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-19 07:21:35,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:21:35,981 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:21:35,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:21:35,981 INFO L85 PathProgramCache]: Analyzing trace with hash -99111112, now seen corresponding path program 1 times [2022-11-19 07:21:35,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:21:35,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [908103816] [2022-11-19 07:21:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:21:35,982 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:21:35,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:21:35,984 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:21:35,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:21:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:21:36,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:21:36,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:21:36,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:36,401 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-19 07:21:36,401 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 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-19 07:21:37,641 INFO L321 Elim1Store]: treesize reduction 58, result has 27.5 percent of original size [2022-11-19 07:21:37,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 44 [2022-11-19 07:21:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:21:38,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:21:38,306 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:21:38,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [908103816] [2022-11-19 07:21:38,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [908103816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:21:38,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:21:38,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:21:38,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118557958] [2022-11-19 07:21:38,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:21:38,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:21:38,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:21:38,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:21:38,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:21:38,309 INFO L87 Difference]: Start difference. First operand 4028 states and 16938 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:21:38,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:21:38,547 INFO L93 Difference]: Finished difference Result 4028 states and 16937 transitions. [2022-11-19 07:21:38,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:21:38,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 07:21:38,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:21:38,564 INFO L225 Difference]: With dead ends: 4028 [2022-11-19 07:21:38,564 INFO L226 Difference]: Without dead ends: 4028 [2022-11-19 07:21:38,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:21:38,565 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:21:38,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-11-19 07:21:38,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4028 states. [2022-11-19 07:21:38,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4028 to 4024. [2022-11-19 07:21:38,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4024 states, 3888 states have (on average 4.354681069958848) internal successors, (16931), 4023 states have internal predecessors, (16931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:21:38,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4024 states to 4024 states and 16931 transitions. [2022-11-19 07:21:38,676 INFO L78 Accepts]: Start accepts. Automaton has 4024 states and 16931 transitions. Word has length 8 [2022-11-19 07:21:38,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:21:38,677 INFO L495 AbstractCegarLoop]: Abstraction has 4024 states and 16931 transitions. [2022-11-19 07:21:38,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:21:38,677 INFO L276 IsEmpty]: Start isEmpty. Operand 4024 states and 16931 transitions. [2022-11-19 07:21:38,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:21:38,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:21:38,677 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:21:38,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:21:38,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:21:38,878 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:21:38,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:21:38,878 INFO L85 PathProgramCache]: Analyzing trace with hash 271346820, now seen corresponding path program 1 times [2022-11-19 07:21:38,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:21:38,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158178061] [2022-11-19 07:21:38,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:21:38,879 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:21:38,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:21:38,880 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:21:38,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-19 07:21:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:21:39,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:21:39,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:21:39,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-19 07:21:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:21:39,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:21:39,071 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:21:39,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158178061] [2022-11-19 07:21:39,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158178061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:21:39,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:21:39,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:21:39,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194140958] [2022-11-19 07:21:39,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:21:39,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:21:39,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:21:39,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:21:39,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:21:39,073 INFO L87 Difference]: Start difference. First operand 4024 states and 16931 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:21:39,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:21:39,408 INFO L93 Difference]: Finished difference Result 2817 states and 11727 transitions. [2022-11-19 07:21:39,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:21:39,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 [2022-11-19 07:21:39,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:21:39,419 INFO L225 Difference]: With dead ends: 2817 [2022-11-19 07:21:39,419 INFO L226 Difference]: Without dead ends: 2817 [2022-11-19 07:21:39,420 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 [2022-11-19 07:21:39,420 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 87 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:21:39,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 6 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:21:39,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2022-11-19 07:21:39,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2817. [2022-11-19 07:21:39,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2817 states, 2745 states have (on average 4.272131147540984) internal successors, (11727), 2816 states have internal predecessors, (11727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:21:39,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 11727 transitions. [2022-11-19 07:21:39,485 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 11727 transitions. Word has length 8 [2022-11-19 07:21:39,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:21:39,485 INFO L495 AbstractCegarLoop]: Abstraction has 2817 states and 11727 transitions. [2022-11-19 07:21:39,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:21:39,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 11727 transitions. [2022-11-19 07:21:39,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:21:39,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:21:39,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:21:39,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:21:39,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:21:39,686 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:21:39,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:21:39,687 INFO L85 PathProgramCache]: Analyzing trace with hash 271346821, now seen corresponding path program 1 times [2022-11-19 07:21:39,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:21:39,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [677567660] [2022-11-19 07:21:39,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:21:39,687 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:21:39,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:21:39,688 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:21:39,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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)] Waiting until timeout for monitored process [2022-11-19 07:21:39,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:21:39,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:21:39,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:21:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:21:39,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:21:39,924 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:21:39,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [677567660] [2022-11-19 07:21:39,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [677567660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:21:39,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:21:39,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:21:39,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425853335] [2022-11-19 07:21:39,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:21:39,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:21:39,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:21:39,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:21:39,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:21:39,926 INFO L87 Difference]: Start difference. First operand 2817 states and 11727 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:21:40,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:21:40,580 INFO L93 Difference]: Finished difference Result 4251 states and 16830 transitions. [2022-11-19 07:21:40,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:21:40,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 [2022-11-19 07:21:40,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:21:40,596 INFO L225 Difference]: With dead ends: 4251 [2022-11-19 07:21:40,596 INFO L226 Difference]: Without dead ends: 4251 [2022-11-19 07:21:40,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:21:40,597 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 73 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:21:40,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 18 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:21:40,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2022-11-19 07:21:40,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 4054. [2022-11-19 07:21:40,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4054 states, 3982 states have (on average 4.12230035158212) internal successors, (16415), 4053 states have internal predecessors, (16415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:21:40,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4054 states to 4054 states and 16415 transitions. [2022-11-19 07:21:40,775 INFO L78 Accepts]: Start accepts. Automaton has 4054 states and 16415 transitions. Word has length 8 [2022-11-19 07:21:40,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:21:40,775 INFO L495 AbstractCegarLoop]: Abstraction has 4054 states and 16415 transitions. [2022-11-19 07:21:40,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:21:40,775 INFO L276 IsEmpty]: Start isEmpty. Operand 4054 states and 16415 transitions. [2022-11-19 07:21:40,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:21:40,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:21:40,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:21:40,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:21:40,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:21:40,976 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:21:40,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:21:40,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1565581004, now seen corresponding path program 1 times [2022-11-19 07:21:40,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:21:40,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077349478] [2022-11-19 07:21:40,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:21:40,978 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:21:40,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:21:40,979 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:21:40,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-19 07:21:41,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:21:41,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 07:21:41,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:21:41,506 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:21:41,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:21:41,676 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-19 07:21:41,677 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 22 [2022-11-19 07:21:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:21:42,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:21:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:21:47,054 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:21:47,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077349478] [2022-11-19 07:21:47,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077349478] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:21:47,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [792913941] [2022-11-19 07:21:47,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:21:47,055 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:21:47,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:21:47,056 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:21:47,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-19 07:21:47,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:21:47,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:21:47,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:21:47,818 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:21:47,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:21:48,152 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-19 07:21:48,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-19 07:21:48,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:21:48,471 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 [2022-11-19 07:21:48,486 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:21:48,487 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 [2022-11-19 07:21:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:21:48,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:21:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:21:56,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [792913941] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:21:56,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813165350] [2022-11-19 07:21:56,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:21:56,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:21:56,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:21:56,264 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:21:56,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-19 07:21:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:21:56,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:21:56,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:21:56,719 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:21:56,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:21:57,018 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-19 07:21:57,019 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 22 [2022-11-19 07:21:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:21:57,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:21:59,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:21:59,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813165350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:21:59,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:21:59,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 3, 3, 5, 5] total 18 [2022-11-19 07:21:59,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551638088] [2022-11-19 07:21:59,003 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:21:59,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 07:21:59,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:21:59,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 07:21:59,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=306, Unknown=1, NotChecked=0, Total=380 [2022-11-19 07:21:59,004 INFO L87 Difference]: Start difference. First operand 4054 states and 16415 transitions. Second operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:21:59,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:21:59,869 INFO L93 Difference]: Finished difference Result 4090 states and 16495 transitions. [2022-11-19 07:21:59,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:21:59,869 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 07:21:59,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:21:59,883 INFO L225 Difference]: With dead ends: 4090 [2022-11-19 07:21:59,883 INFO L226 Difference]: Without dead ends: 4090 [2022-11-19 07:21:59,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=107, Invalid=444, Unknown=1, NotChecked=0, Total=552 [2022-11-19 07:21:59,885 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 325 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:21:59,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 71 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 325 Unchecked, 0.4s Time] [2022-11-19 07:21:59,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4090 states. [2022-11-19 07:21:59,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4090 to 4068. [2022-11-19 07:21:59,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4068 states, 3996 states have (on average 4.115615615615615) internal successors, (16446), 4067 states have internal predecessors, (16446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:21:59,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4068 states to 4068 states and 16446 transitions. [2022-11-19 07:21:59,998 INFO L78 Accepts]: Start accepts. Automaton has 4068 states and 16446 transitions. Word has length 8 [2022-11-19 07:21:59,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:21:59,998 INFO L495 AbstractCegarLoop]: Abstraction has 4068 states and 16446 transitions. [2022-11-19 07:21:59,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:21:59,998 INFO L276 IsEmpty]: Start isEmpty. Operand 4068 states and 16446 transitions. [2022-11-19 07:21:59,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:21:59,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:21:59,999 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:22:00,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-19 07:22:00,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-19 07:22:00,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-19 07:22:00,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:22:00,600 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:22:00,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:00,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1553630336, now seen corresponding path program 1 times [2022-11-19 07:22:00,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:22:00,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844485909] [2022-11-19 07:22:00,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:00,601 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:22:00,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:22:00,602 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:22:00,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-19 07:22:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:00,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:22:00,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:22:00,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:22:01,010 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-19 07:22:01,010 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-19 07:22:01,132 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:22:01,132 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 [2022-11-19 07:22:01,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:22:01,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:22:01,206 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:22:01,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844485909] [2022-11-19 07:22:01,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844485909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:01,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:22:01,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:22:01,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344244057] [2022-11-19 07:22:01,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:01,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:22:01,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:22:01,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:22:01,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:22:01,208 INFO L87 Difference]: Start difference. First operand 4068 states and 16446 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:01,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:01,403 INFO L93 Difference]: Finished difference Result 4069 states and 16454 transitions. [2022-11-19 07:22:01,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:22:01,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 07:22:01,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:01,422 INFO L225 Difference]: With dead ends: 4069 [2022-11-19 07:22:01,422 INFO L226 Difference]: Without dead ends: 4069 [2022-11-19 07:22:01,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:22:01,423 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:01,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2022-11-19 07:22:01,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4069 states. [2022-11-19 07:22:01,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4069 to 4069. [2022-11-19 07:22:01,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4069 states, 3997 states have (on average 4.116587440580435) internal successors, (16454), 4068 states have internal predecessors, (16454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:01,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4069 states to 4069 states and 16454 transitions. [2022-11-19 07:22:01,522 INFO L78 Accepts]: Start accepts. Automaton has 4069 states and 16454 transitions. Word has length 8 [2022-11-19 07:22:01,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:01,522 INFO L495 AbstractCegarLoop]: Abstraction has 4069 states and 16454 transitions. [2022-11-19 07:22:01,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:01,522 INFO L276 IsEmpty]: Start isEmpty. Operand 4069 states and 16454 transitions. [2022-11-19 07:22:01,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:22:01,523 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:01,523 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:22:01,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-19 07:22:01,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:22:01,723 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:22:01,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:01,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1553631930, now seen corresponding path program 1 times [2022-11-19 07:22:01,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:22:01,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672269105] [2022-11-19 07:22:01,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:01,724 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:22:01,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:22:01,725 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:22:01,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-19 07:22:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:01,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:22:01,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:22:02,262 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:22:02,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:22:02,611 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-19 07:22:02,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-19 07:22:02,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:22:02,801 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 [2022-11-19 07:22:02,834 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:22:02,835 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 [2022-11-19 07:22:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:22:02,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:22:10,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:22:10,401 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:22:10,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672269105] [2022-11-19 07:22:10,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672269105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:22:10,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1283158816] [2022-11-19 07:22:10,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:10,402 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:22:10,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:22:10,404 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:22:10,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-19 07:22:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:10,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:22:10,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:22:11,097 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:22:11,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:22:11,450 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-19 07:22:11,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-19 07:22:11,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:22:11,720 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 [2022-11-19 07:22:11,735 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:22:11,735 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 [2022-11-19 07:22:11,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:22:11,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:22:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:22:21,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1283158816] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:22:21,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859976261] [2022-11-19 07:22:21,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:21,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:22:21,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:22:21,088 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:22:21,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-19 07:22:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:21,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:22:21,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:22:21,639 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:22:21,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:22:22,015 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-19 07:22:22,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-19 07:22:22,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:22:22,168 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 [2022-11-19 07:22:22,193 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:22:22,194 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 [2022-11-19 07:22:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:22:22,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:22:33,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:22:33,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859976261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:22:33,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:22:33,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 10 [2022-11-19 07:22:33,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426849304] [2022-11-19 07:22:33,802 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:22:33,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 07:22:33,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:22:33,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 07:22:33,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=86, Unknown=4, NotChecked=0, Total=132 [2022-11-19 07:22:33,804 INFO L87 Difference]: Start difference. First operand 4069 states and 16454 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:34,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:34,360 INFO L93 Difference]: Finished difference Result 4082 states and 16486 transitions. [2022-11-19 07:22:34,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:22:34,361 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 07:22:34,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:34,376 INFO L225 Difference]: With dead ends: 4082 [2022-11-19 07:22:34,376 INFO L226 Difference]: Without dead ends: 4082 [2022-11-19 07:22:34,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=42, Invalid=86, Unknown=4, NotChecked=0, Total=132 [2022-11-19 07:22:34,377 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:34,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 49 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 119 Invalid, 0 Unknown, 175 Unchecked, 0.5s Time] [2022-11-19 07:22:34,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2022-11-19 07:22:34,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 4072. [2022-11-19 07:22:34,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4072 states, 4000 states have (on average 4.1155) internal successors, (16462), 4071 states have internal predecessors, (16462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:34,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4072 states to 4072 states and 16462 transitions. [2022-11-19 07:22:34,487 INFO L78 Accepts]: Start accepts. Automaton has 4072 states and 16462 transitions. Word has length 8 [2022-11-19 07:22:34,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:34,487 INFO L495 AbstractCegarLoop]: Abstraction has 4072 states and 16462 transitions. [2022-11-19 07:22:34,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:34,487 INFO L276 IsEmpty]: Start isEmpty. Operand 4072 states and 16462 transitions. [2022-11-19 07:22:34,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:22:34,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:34,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:22:34,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-19 07:22:34,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-19 07:22:34,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:22:35,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:22:35,089 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:22:35,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:35,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1553846092, now seen corresponding path program 1 times [2022-11-19 07:22:35,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:22:35,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117763994] [2022-11-19 07:22:35,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:35,090 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:22:35,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:22:35,091 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:22:35,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-19 07:22:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:35,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:22:35,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:22:35,513 INFO L321 Elim1Store]: treesize reduction 178, result has 20.2 percent of original size [2022-11-19 07:22:35,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 78 [2022-11-19 07:22:35,969 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-19 07:22:35,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 68 [2022-11-19 07:22:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:22:36,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:22:36,601 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:22:36,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117763994] [2022-11-19 07:22:36,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117763994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:36,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:22:36,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:22:36,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189479130] [2022-11-19 07:22:36,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:36,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:22:36,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:22:36,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:22:36,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:22:36,603 INFO L87 Difference]: Start difference. First operand 4072 states and 16462 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:36,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:36,846 INFO L93 Difference]: Finished difference Result 4072 states and 16460 transitions. [2022-11-19 07:22:36,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:22:36,847 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 [2022-11-19 07:22:36,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:36,861 INFO L225 Difference]: With dead ends: 4072 [2022-11-19 07:22:36,861 INFO L226 Difference]: Without dead ends: 4072 [2022-11-19 07:22:36,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:22:36,862 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:36,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2022-11-19 07:22:36,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4072 states. [2022-11-19 07:22:36,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4072 to 4072. [2022-11-19 07:22:36,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4072 states, 4000 states have (on average 4.115) internal successors, (16460), 4071 states have internal predecessors, (16460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:36,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4072 states to 4072 states and 16460 transitions. [2022-11-19 07:22:36,973 INFO L78 Accepts]: Start accepts. Automaton has 4072 states and 16460 transitions. Word has length 8 [2022-11-19 07:22:36,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:36,973 INFO L495 AbstractCegarLoop]: Abstraction has 4072 states and 16460 transitions. [2022-11-19 07:22:36,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:36,974 INFO L276 IsEmpty]: Start isEmpty. Operand 4072 states and 16460 transitions. [2022-11-19 07:22:36,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:22:36,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:36,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:22:36,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:22:37,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:22:37,177 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:22:37,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:37,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1553845999, now seen corresponding path program 1 times [2022-11-19 07:22:37,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:22:37,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [843354655] [2022-11-19 07:22:37,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:37,178 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:22:37,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:22:37,181 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:22:37,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-19 07:22:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:37,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:22:37,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:22:37,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:22:37,630 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-19 07:22:37,631 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 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-19 07:22:38,997 INFO L321 Elim1Store]: treesize reduction 58, result has 27.5 percent of original size [2022-11-19 07:22:38,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 44 [2022-11-19 07:22:39,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:22:39,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:22:39,731 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:22:39,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [843354655] [2022-11-19 07:22:39,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [843354655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:39,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:22:39,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:22:39,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922809076] [2022-11-19 07:22:39,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:39,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:22:39,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:22:39,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:22:39,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:22:39,732 INFO L87 Difference]: Start difference. First operand 4072 states and 16460 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:39,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:39,958 INFO L93 Difference]: Finished difference Result 4073 states and 16461 transitions. [2022-11-19 07:22:39,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:22:39,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 07:22:39,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:39,973 INFO L225 Difference]: With dead ends: 4073 [2022-11-19 07:22:39,974 INFO L226 Difference]: Without dead ends: 4073 [2022-11-19 07:22:39,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:22:39,975 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:39,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2022-11-19 07:22:39,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4073 states. [2022-11-19 07:22:40,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4073 to 4073. [2022-11-19 07:22:40,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4073 states, 4001 states have (on average 4.11422144463884) internal successors, (16461), 4072 states have internal predecessors, (16461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:40,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4073 states to 4073 states and 16461 transitions. [2022-11-19 07:22:40,069 INFO L78 Accepts]: Start accepts. Automaton has 4073 states and 16461 transitions. Word has length 8 [2022-11-19 07:22:40,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:40,069 INFO L495 AbstractCegarLoop]: Abstraction has 4073 states and 16461 transitions. [2022-11-19 07:22:40,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:40,069 INFO L276 IsEmpty]: Start isEmpty. Operand 4073 states and 16461 transitions. [2022-11-19 07:22:40,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:22:40,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:40,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:22:40,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-19 07:22:40,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:22:40,270 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:22:40,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:40,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1229201671, now seen corresponding path program 1 times [2022-11-19 07:22:40,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:22:40,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21942874] [2022-11-19 07:22:40,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:40,271 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:22:40,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:22:40,273 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:22:40,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-19 07:22:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:40,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:22:40,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:22:40,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-19 07:22:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:22:40,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:22:41,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:22:41,971 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:22:41,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21942874] [2022-11-19 07:22:41,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21942874] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:22:41,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [356263382] [2022-11-19 07:22:41,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:41,971 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:22:41,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:22:41,972 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:22:41,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-19 07:22:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:42,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:22:42,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:22:42,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-19 07:22:42,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:22:42,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:22:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:22:43,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [356263382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:22:43,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074325171] [2022-11-19 07:22:43,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:43,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:22:43,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:22:43,442 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:22:43,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-19 07:22:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:43,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:22:43,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:22:43,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-19 07:22:43,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:22:43,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:22:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:22:44,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074325171] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:22:44,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:22:44,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-11-19 07:22:44,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656886714] [2022-11-19 07:22:44,337 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:22:44,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 07:22:44,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:22:44,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 07:22:44,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:22:44,339 INFO L87 Difference]: Start difference. First operand 4073 states and 16461 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:47,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:47,257 INFO L93 Difference]: Finished difference Result 4131 states and 16634 transitions. [2022-11-19 07:22:47,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:22:47,258 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:22:47,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:47,272 INFO L225 Difference]: With dead ends: 4131 [2022-11-19 07:22:47,272 INFO L226 Difference]: Without dead ends: 4131 [2022-11-19 07:22:47,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:22:47,273 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:47,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 56 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 143 Unchecked, 0.5s Time] [2022-11-19 07:22:47,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2022-11-19 07:22:47,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 4129. [2022-11-19 07:22:47,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4129 states, 4057 states have (on average 4.0995809711609565) internal successors, (16632), 4128 states have internal predecessors, (16632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:47,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4129 states to 4129 states and 16632 transitions. [2022-11-19 07:22:47,416 INFO L78 Accepts]: Start accepts. Automaton has 4129 states and 16632 transitions. Word has length 9 [2022-11-19 07:22:47,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:47,416 INFO L495 AbstractCegarLoop]: Abstraction has 4129 states and 16632 transitions. [2022-11-19 07:22:47,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:47,416 INFO L276 IsEmpty]: Start isEmpty. Operand 4129 states and 16632 transitions. [2022-11-19 07:22:47,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:22:47,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:47,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:22:47,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-19 07:22:47,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-19 07:22:47,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-11-19 07:22:48,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:22:48,018 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:22:48,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:48,020 INFO L85 PathProgramCache]: Analyzing trace with hash -178178409, now seen corresponding path program 1 times [2022-11-19 07:22:48,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:22:48,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1917126168] [2022-11-19 07:22:48,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:48,021 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:22:48,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:22:48,022 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:22:48,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-19 07:22:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:48,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:22:48,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:22:48,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:22:48,473 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-19 07:22:48,474 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-19 07:22:49,370 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-19 07:22:49,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-19 07:22:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:22:49,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:22:49,841 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:22:49,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1917126168] [2022-11-19 07:22:49,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1917126168] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:49,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:22:49,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:22:49,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685365871] [2022-11-19 07:22:49,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:49,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:22:49,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:22:49,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:22:49,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:22:49,843 INFO L87 Difference]: Start difference. First operand 4129 states and 16632 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:50,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:50,066 INFO L93 Difference]: Finished difference Result 4129 states and 16630 transitions. [2022-11-19 07:22:50,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:22:50,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:22:50,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:50,081 INFO L225 Difference]: With dead ends: 4129 [2022-11-19 07:22:50,081 INFO L226 Difference]: Without dead ends: 4129 [2022-11-19 07:22:50,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:22:50,082 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:50,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2022-11-19 07:22:50,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4129 states. [2022-11-19 07:22:50,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4129 to 4129. [2022-11-19 07:22:50,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4129 states, 4057 states have (on average 4.099087996056199) internal successors, (16630), 4128 states have internal predecessors, (16630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:50,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4129 states to 4129 states and 16630 transitions. [2022-11-19 07:22:50,174 INFO L78 Accepts]: Start accepts. Automaton has 4129 states and 16630 transitions. Word has length 9 [2022-11-19 07:22:50,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:50,174 INFO L495 AbstractCegarLoop]: Abstraction has 4129 states and 16630 transitions. [2022-11-19 07:22:50,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:50,174 INFO L276 IsEmpty]: Start isEmpty. Operand 4129 states and 16630 transitions. [2022-11-19 07:22:50,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:22:50,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:50,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:22:50,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-19 07:22:50,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:22:50,378 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:22:50,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:50,379 INFO L85 PathProgramCache]: Analyzing trace with hash -178188050, now seen corresponding path program 1 times [2022-11-19 07:22:50,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:22:50,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808116707] [2022-11-19 07:22:50,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:50,379 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:22:50,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:22:50,380 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:22:50,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:22:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:50,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:22:50,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:22:50,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:22:50,845 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-19 07:22:50,846 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-19 07:22:51,728 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-19 07:22:51,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-19 07:22:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:22:54,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:22:54,223 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:22:54,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808116707] [2022-11-19 07:22:54,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808116707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:54,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:22:54,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:22:54,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906889698] [2022-11-19 07:22:54,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:54,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:22:54,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:22:54,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:22:54,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=5, Unknown=1, NotChecked=0, Total=12 [2022-11-19 07:22:54,226 INFO L87 Difference]: Start difference. First operand 4129 states and 16630 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:54,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:54,467 INFO L93 Difference]: Finished difference Result 4129 states and 16628 transitions. [2022-11-19 07:22:54,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:22:54,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:22:54,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:54,482 INFO L225 Difference]: With dead ends: 4129 [2022-11-19 07:22:54,483 INFO L226 Difference]: Without dead ends: 4129 [2022-11-19 07:22:54,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6, Invalid=5, Unknown=1, NotChecked=0, Total=12 [2022-11-19 07:22:54,483 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:54,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 18 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 77 Unchecked, 0.2s Time] [2022-11-19 07:22:54,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4129 states. [2022-11-19 07:22:54,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4129 to 4129. [2022-11-19 07:22:54,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4129 states, 4057 states have (on average 4.098595020951442) internal successors, (16628), 4128 states have internal predecessors, (16628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:54,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4129 states to 4129 states and 16628 transitions. [2022-11-19 07:22:54,574 INFO L78 Accepts]: Start accepts. Automaton has 4129 states and 16628 transitions. Word has length 9 [2022-11-19 07:22:54,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:54,574 INFO L495 AbstractCegarLoop]: Abstraction has 4129 states and 16628 transitions. [2022-11-19 07:22:54,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:54,574 INFO L276 IsEmpty]: Start isEmpty. Operand 4129 states and 16628 transitions. [2022-11-19 07:22:54,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:22:54,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:54,575 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:22:54,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:22:54,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:22:54,776 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:22:54,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:54,776 INFO L85 PathProgramCache]: Analyzing trace with hash -177946554, now seen corresponding path program 1 times [2022-11-19 07:22:54,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:22:54,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [611209315] [2022-11-19 07:22:54,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:54,776 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:22:54,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:22:54,777 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:22:54,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-19 07:22:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:55,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:22:55,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:22:55,178 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-11-19 07:22:55,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 55 [2022-11-19 07:22:55,242 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:22:55,243 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 [2022-11-19 07:22:55,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:22:55,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:22:55,279 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:22:55,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [611209315] [2022-11-19 07:22:55,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [611209315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:55,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:22:55,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:22:55,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456475342] [2022-11-19 07:22:55,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:55,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:22:55,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:22:55,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:22:55,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:22:55,281 INFO L87 Difference]: Start difference. First operand 4129 states and 16628 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:55,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:55,589 INFO L93 Difference]: Finished difference Result 3954 states and 15938 transitions. [2022-11-19 07:22:55,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:22:55,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:22:55,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:55,602 INFO L225 Difference]: With dead ends: 3954 [2022-11-19 07:22:55,603 INFO L226 Difference]: Without dead ends: 3954 [2022-11-19 07:22:55,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:22:55,603 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 6 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 [2022-11-19 07:22:55,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 6 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:22:55,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3954 states. [2022-11-19 07:22:55,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3954 to 3954. [2022-11-19 07:22:55,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3954 states, 3892 states have (on average 4.095066803699897) internal successors, (15938), 3953 states have internal predecessors, (15938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:55,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3954 states to 3954 states and 15938 transitions. [2022-11-19 07:22:55,730 INFO L78 Accepts]: Start accepts. Automaton has 3954 states and 15938 transitions. Word has length 9 [2022-11-19 07:22:55,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:55,731 INFO L495 AbstractCegarLoop]: Abstraction has 3954 states and 15938 transitions. [2022-11-19 07:22:55,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:55,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3954 states and 15938 transitions. [2022-11-19 07:22:55,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:22:55,732 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:55,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:22:55,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:22:55,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:22:55,948 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:22:55,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:55,948 INFO L85 PathProgramCache]: Analyzing trace with hash -177946552, now seen corresponding path program 1 times [2022-11-19 07:22:55,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:22:55,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585868361] [2022-11-19 07:22:55,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:55,949 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:22:55,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:22:55,950 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:22:55,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-19 07:22:56,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:56,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:22:56,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:22:56,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:22:56,560 INFO L321 Elim1Store]: treesize reduction 120, result has 27.7 percent of original size [2022-11-19 07:22:56,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 56 [2022-11-19 07:22:56,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:22:56,611 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 838 treesize of output 822 [2022-11-19 07:22:56,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:22:56,802 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 [2022-11-19 07:22:56,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:22:56,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:22:56,986 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:22:56,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585868361] [2022-11-19 07:22:56,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585868361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:56,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:22:56,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:22:56,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198171746] [2022-11-19 07:22:56,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:56,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:22:56,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:22:56,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:22:56,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:22:56,989 INFO L87 Difference]: Start difference. First operand 3954 states and 15938 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:57,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:57,371 INFO L93 Difference]: Finished difference Result 3779 states and 15248 transitions. [2022-11-19 07:22:57,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:22:57,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:22:57,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:57,385 INFO L225 Difference]: With dead ends: 3779 [2022-11-19 07:22:57,385 INFO L226 Difference]: Without dead ends: 3779 [2022-11-19 07:22:57,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:22:57,386 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 82 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:57,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 6 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 1 Unchecked, 0.4s Time] [2022-11-19 07:22:57,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3779 states. [2022-11-19 07:22:57,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3779 to 3779. [2022-11-19 07:22:57,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3779 states, 3727 states have (on average 4.091226187281996) internal successors, (15248), 3778 states have internal predecessors, (15248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:57,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3779 states to 3779 states and 15248 transitions. [2022-11-19 07:22:57,468 INFO L78 Accepts]: Start accepts. Automaton has 3779 states and 15248 transitions. Word has length 9 [2022-11-19 07:22:57,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:57,469 INFO L495 AbstractCegarLoop]: Abstraction has 3779 states and 15248 transitions. [2022-11-19 07:22:57,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:57,469 INFO L276 IsEmpty]: Start isEmpty. Operand 3779 states and 15248 transitions. [2022-11-19 07:22:57,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:22:57,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:57,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:22:57,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-19 07:22:57,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:22:57,670 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:22:57,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:57,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1288149136, now seen corresponding path program 1 times [2022-11-19 07:22:57,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:22:57,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1914089986] [2022-11-19 07:22:57,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:57,671 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:22:57,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:22:57,672 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:22:57,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-19 07:22:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:57,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:22:57,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:22:58,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:22:58,217 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-19 07:22:58,218 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-19 07:22:59,269 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-19 07:22:59,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-19 07:22:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:22:59,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:22:59,787 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:22:59,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1914089986] [2022-11-19 07:22:59,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1914089986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:59,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:22:59,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:22:59,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905411585] [2022-11-19 07:22:59,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:59,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:22:59,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:22:59,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:22:59,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:22:59,789 INFO L87 Difference]: Start difference. First operand 3779 states and 15248 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:22:59,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:59,960 INFO L93 Difference]: Finished difference Result 3782 states and 15264 transitions. [2022-11-19 07:22:59,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:22:59,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:22:59,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:59,976 INFO L225 Difference]: With dead ends: 3782 [2022-11-19 07:22:59,976 INFO L226 Difference]: Without dead ends: 3782 [2022-11-19 07:22:59,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:22:59,977 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:59,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-11-19 07:22:59,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3782 states. [2022-11-19 07:23:00,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3782 to 3782. [2022-11-19 07:23:00,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3782 states, 3730 states have (on average 4.092225201072386) internal successors, (15264), 3781 states have internal predecessors, (15264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:23:00,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3782 states to 3782 states and 15264 transitions. [2022-11-19 07:23:00,064 INFO L78 Accepts]: Start accepts. Automaton has 3782 states and 15264 transitions. Word has length 9 [2022-11-19 07:23:00,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:00,064 INFO L495 AbstractCegarLoop]: Abstraction has 3782 states and 15264 transitions. [2022-11-19 07:23:00,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:23:00,064 INFO L276 IsEmpty]: Start isEmpty. Operand 3782 states and 15264 transitions. [2022-11-19 07:23:00,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:23:00,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:00,065 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:23:00,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-11-19 07:23:00,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:23:00,266 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:23:00,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:00,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1288150730, now seen corresponding path program 1 times [2022-11-19 07:23:00,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:23:00,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [464240215] [2022-11-19 07:23:00,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:00,267 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:23:00,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:23:00,268 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:23:00,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-19 07:23:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:00,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 07:23:00,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:23:00,947 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:23:00,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:23:01,152 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-19 07:23:01,153 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 16 treesize of output 22 [2022-11-19 07:23:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:23:01,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:23:06,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:23:06,027 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:23:06,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [464240215] [2022-11-19 07:23:06,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [464240215] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:23:06,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [44833406] [2022-11-19 07:23:06,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:06,028 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:23:06,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:23:06,029 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:23:06,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-19 07:23:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:06,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:23:06,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:23:06,936 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:23:06,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:23:07,353 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-19 07:23:07,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-19 07:23:07,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:23:07,702 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 [2022-11-19 07:23:07,729 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:23:07,729 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 [2022-11-19 07:23:07,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:23:07,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:23:16,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:23:16,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [44833406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:23:16,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876335749] [2022-11-19 07:23:16,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:16,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:23:16,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:23:16,444 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:23:16,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-19 07:23:16,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:16,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:23:16,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:23:16,995 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:23:16,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:23:17,340 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-19 07:23:17,341 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 22 [2022-11-19 07:23:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:23:17,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:23:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:23:20,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876335749] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:23:20,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:23:20,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 3, 3, 5, 5] total 18 [2022-11-19 07:23:20,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916166182] [2022-11-19 07:23:20,784 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:23:20,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 07:23:20,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:23:20,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 07:23:20,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=306, Unknown=1, NotChecked=0, Total=380 [2022-11-19 07:23:20,786 INFO L87 Difference]: Start difference. First operand 3782 states and 15264 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:23:21,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:21,651 INFO L93 Difference]: Finished difference Result 3825 states and 15364 transitions. [2022-11-19 07:23:21,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:23:21,651 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:23:21,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:21,665 INFO L225 Difference]: With dead ends: 3825 [2022-11-19 07:23:21,665 INFO L226 Difference]: Without dead ends: 3825 [2022-11-19 07:23:21,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=107, Invalid=444, Unknown=1, NotChecked=0, Total=552 [2022-11-19 07:23:21,666 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:21,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 54 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 209 Unchecked, 0.3s Time] [2022-11-19 07:23:21,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3825 states. [2022-11-19 07:23:21,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3825 to 3789. [2022-11-19 07:23:21,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3737 states have (on average 4.089376505218089) internal successors, (15282), 3788 states have internal predecessors, (15282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:23:21,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15282 transitions. [2022-11-19 07:23:21,751 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15282 transitions. Word has length 9 [2022-11-19 07:23:21,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:21,751 INFO L495 AbstractCegarLoop]: Abstraction has 3789 states and 15282 transitions. [2022-11-19 07:23:21,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:23:21,751 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15282 transitions. [2022-11-19 07:23:21,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:23:21,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:21,752 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:23:21,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-19 07:23:21,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-11-19 07:23:22,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:23:22,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:23:22,354 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:23:22,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:22,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1288364892, now seen corresponding path program 1 times [2022-11-19 07:23:22,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:23:22,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1120572567] [2022-11-19 07:23:22,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:22,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:23:22,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:23:22,356 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:23:22,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:23:22,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:22,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:23:22,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:23:22,897 INFO L321 Elim1Store]: treesize reduction 178, result has 20.2 percent of original size [2022-11-19 07:23:22,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 78 [2022-11-19 07:23:23,630 INFO L321 Elim1Store]: treesize reduction 54, result has 32.5 percent of original size [2022-11-19 07:23:23,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 52 [2022-11-19 07:23:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:23:24,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:23:24,289 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:23:24,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1120572567] [2022-11-19 07:23:24,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1120572567] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:23:24,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:23:24,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:23:24,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496771068] [2022-11-19 07:23:24,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:23:24,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:23:24,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:23:24,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:23:24,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:23:24,292 INFO L87 Difference]: Start difference. First operand 3789 states and 15282 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:23:24,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:24,505 INFO L93 Difference]: Finished difference Result 3787 states and 15275 transitions. [2022-11-19 07:23:24,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:23:24,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:23:24,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:24,519 INFO L225 Difference]: With dead ends: 3787 [2022-11-19 07:23:24,519 INFO L226 Difference]: Without dead ends: 3787 [2022-11-19 07:23:24,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:23:24,520 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:24,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 71 Unchecked, 0.2s Time] [2022-11-19 07:23:24,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3787 states. [2022-11-19 07:23:24,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3787 to 3787. [2022-11-19 07:23:24,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3787 states, 3735 states have (on average 4.089692101740295) internal successors, (15275), 3786 states have internal predecessors, (15275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:23:24,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3787 states to 3787 states and 15275 transitions. [2022-11-19 07:23:24,602 INFO L78 Accepts]: Start accepts. Automaton has 3787 states and 15275 transitions. Word has length 9 [2022-11-19 07:23:24,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:24,603 INFO L495 AbstractCegarLoop]: Abstraction has 3787 states and 15275 transitions. [2022-11-19 07:23:24,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:23:24,603 INFO L276 IsEmpty]: Start isEmpty. Operand 3787 states and 15275 transitions. [2022-11-19 07:23:24,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:23:24,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:24,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:23:24,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:23:24,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:23:24,818 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:23:24,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:24,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1288364799, now seen corresponding path program 1 times [2022-11-19 07:23:24,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:23:24,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136779823] [2022-11-19 07:23:24,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:24,819 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:23:24,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:23:24,820 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:23:24,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-19 07:23:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:25,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:23:25,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:23:25,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:23:25,467 INFO L321 Elim1Store]: treesize reduction 161, result has 20.3 percent of original size [2022-11-19 07:23:25,468 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 7 case distinctions, treesize of input 49 treesize of output 74 [2022-11-19 07:23:27,102 INFO L321 Elim1Store]: treesize reduction 58, result has 27.5 percent of original size [2022-11-19 07:23:27,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 44 [2022-11-19 07:23:27,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:23:27,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:23:27,876 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:23:27,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136779823] [2022-11-19 07:23:27,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136779823] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:23:27,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:23:27,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:23:27,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63353276] [2022-11-19 07:23:27,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:23:27,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:23:27,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:23:27,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:23:27,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:23:27,878 INFO L87 Difference]: Start difference. First operand 3787 states and 15275 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:23:28,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:28,081 INFO L93 Difference]: Finished difference Result 3790 states and 15277 transitions. [2022-11-19 07:23:28,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:23:28,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:23:28,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:28,094 INFO L225 Difference]: With dead ends: 3790 [2022-11-19 07:23:28,094 INFO L226 Difference]: Without dead ends: 3790 [2022-11-19 07:23:28,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:23:28,095 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:28,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-11-19 07:23:28,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-11-19 07:23:28,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 3790. [2022-11-19 07:23:28,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3790 states, 3738 states have (on average 4.086944890315677) internal successors, (15277), 3789 states have internal predecessors, (15277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:23:28,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3790 states to 3790 states and 15277 transitions. [2022-11-19 07:23:28,176 INFO L78 Accepts]: Start accepts. Automaton has 3790 states and 15277 transitions. Word has length 9 [2022-11-19 07:23:28,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:28,176 INFO L495 AbstractCegarLoop]: Abstraction has 3790 states and 15277 transitions. [2022-11-19 07:23:28,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:23:28,176 INFO L276 IsEmpty]: Start isEmpty. Operand 3790 states and 15277 transitions. [2022-11-19 07:23:28,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:23:28,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:28,177 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:23:28,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Ended with exit code 0 [2022-11-19 07:23:28,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:23:28,380 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:23:28,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:28,380 INFO L85 PathProgramCache]: Analyzing trace with hash -917907221, now seen corresponding path program 1 times [2022-11-19 07:23:28,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:23:28,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1416125369] [2022-11-19 07:23:28,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:28,381 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:23:28,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:23:28,382 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:23:28,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:23:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:28,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:23:28,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:23:29,035 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:23:29,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:23:29,452 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-19 07:23:29,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-19 07:23:29,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:23:29,721 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 [2022-11-19 07:23:29,739 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:23:29,740 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 [2022-11-19 07:23:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:23:29,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:23:37,881 WARN L233 SmtUtils]: Spent 5.31s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:23:37,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:23:37,882 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:23:37,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1416125369] [2022-11-19 07:23:37,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1416125369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:23:37,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [682572364] [2022-11-19 07:23:37,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:37,883 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:23:37,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:23:37,884 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:23:37,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-19 07:23:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:38,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:23:38,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:23:38,847 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:23:38,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:23:39,276 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-19 07:23:39,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-19 07:23:39,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:23:39,576 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 [2022-11-19 07:23:39,596 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:23:39,596 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 [2022-11-19 07:23:39,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:23:39,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:23:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:23:43,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [682572364] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:23:43,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26450337] [2022-11-19 07:23:43,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:43,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:23:43,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:23:43,417 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:23:43,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-19 07:23:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:43,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:23:43,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:23:44,052 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:23:44,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:23:44,450 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-19 07:23:44,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-19 07:23:44,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:23:44,679 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 [2022-11-19 07:23:44,705 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:23:44,705 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 [2022-11-19 07:23:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:23:44,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:23:47,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:23:47,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26450337] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:23:47,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:23:47,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 8 [2022-11-19 07:23:47,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739834819] [2022-11-19 07:23:47,576 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:23:47,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:23:47,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:23:47,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:23:47,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:23:47,578 INFO L87 Difference]: Start difference. First operand 3790 states and 15277 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2022-11-19 07:23:48,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:48,092 INFO L93 Difference]: Finished difference Result 3810 states and 15340 transitions. [2022-11-19 07:23:48,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:23:48,093 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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 [2022-11-19 07:23:48,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:48,107 INFO L225 Difference]: With dead ends: 3810 [2022-11-19 07:23:48,107 INFO L226 Difference]: Without dead ends: 3810 [2022-11-19 07:23:48,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:23:48,108 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:48,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 44 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 81 Unchecked, 0.5s Time] [2022-11-19 07:23:48,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2022-11-19 07:23:48,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 3810. [2022-11-19 07:23:48,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3810 states, 3758 states have (on average 4.081958488557744) internal successors, (15340), 3809 states have internal predecessors, (15340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:23:48,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3810 states to 3810 states and 15340 transitions. [2022-11-19 07:23:48,193 INFO L78 Accepts]: Start accepts. Automaton has 3810 states and 15340 transitions. Word has length 9 [2022-11-19 07:23:48,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:48,193 INFO L495 AbstractCegarLoop]: Abstraction has 3810 states and 15340 transitions. [2022-11-19 07:23:48,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 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) [2022-11-19 07:23:48,193 INFO L276 IsEmpty]: Start isEmpty. Operand 3810 states and 15340 transitions. [2022-11-19 07:23:48,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:23:48,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:48,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:23:48,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:23:48,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-19 07:23:48,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (55)] Forceful destruction successful, exit code 0 [2022-11-19 07:23:48,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:23:48,798 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:23:48,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:48,798 INFO L85 PathProgramCache]: Analyzing trace with hash -924587859, now seen corresponding path program 1 times [2022-11-19 07:23:48,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:23:48,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1009082860] [2022-11-19 07:23:48,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:48,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:23:48,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:23:48,800 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:23:48,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-19 07:23:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:49,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:23:49,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:23:49,315 INFO L321 Elim1Store]: treesize reduction 178, result has 20.2 percent of original size [2022-11-19 07:23:49,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 78 [2022-11-19 07:23:50,066 INFO L321 Elim1Store]: treesize reduction 54, result has 32.5 percent of original size [2022-11-19 07:23:50,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 52 [2022-11-19 07:23:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:23:50,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:23:50,692 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:23:50,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1009082860] [2022-11-19 07:23:50,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1009082860] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:23:50,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:23:50,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:23:50,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471694221] [2022-11-19 07:23:50,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:23:50,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:23:50,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:23:50,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:23:50,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:23:50,693 INFO L87 Difference]: Start difference. First operand 3810 states and 15340 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:23:50,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:50,888 INFO L93 Difference]: Finished difference Result 3810 states and 15339 transitions. [2022-11-19 07:23:50,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:23:50,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:23:50,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:50,902 INFO L225 Difference]: With dead ends: 3810 [2022-11-19 07:23:50,903 INFO L226 Difference]: Without dead ends: 3810 [2022-11-19 07:23:50,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:23:50,903 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:50,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 99 Unchecked, 0.2s Time] [2022-11-19 07:23:50,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2022-11-19 07:23:50,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 3809. [2022-11-19 07:23:50,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3809 states, 3757 states have (on average 4.082512643066276) internal successors, (15338), 3808 states have internal predecessors, (15338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:23:50,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3809 states to 3809 states and 15338 transitions. [2022-11-19 07:23:50,990 INFO L78 Accepts]: Start accepts. Automaton has 3809 states and 15338 transitions. Word has length 9 [2022-11-19 07:23:50,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:50,990 INFO L495 AbstractCegarLoop]: Abstraction has 3809 states and 15338 transitions. [2022-11-19 07:23:50,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:23:50,991 INFO L276 IsEmpty]: Start isEmpty. Operand 3809 states and 15338 transitions. [2022-11-19 07:23:50,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:23:50,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:50,991 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2022-11-19 07:23:51,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:23:51,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:23:51,192 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:23:51,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:51,192 INFO L85 PathProgramCache]: Analyzing trace with hash 246279684, now seen corresponding path program 2 times [2022-11-19 07:23:51,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:23:51,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [530920236] [2022-11-19 07:23:51,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:23:51,193 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:23:51,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:23:51,194 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:23:51,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-11-19 07:23:51,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 07:23:51,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:23:51,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:23:51,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:23:51,821 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:23:51,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:23:52,235 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-11-19 07:23:52,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-11-19 07:23:52,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:23:52,474 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 [2022-11-19 07:23:52,500 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:23:52,501 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 [2022-11-19 07:23:52,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:23:52,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:23:52,581 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:23:52,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [530920236] [2022-11-19 07:23:52,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [530920236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:23:52,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:23:52,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:23:52,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801640859] [2022-11-19 07:23:52,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:23:52,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:23:52,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:23:52,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:23:52,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:23:52,583 INFO L87 Difference]: Start difference. First operand 3809 states and 15338 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) [2022-11-19 07:23:53,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:53,009 INFO L93 Difference]: Finished difference Result 2887 states and 11378 transitions. [2022-11-19 07:23:53,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:23:53,009 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 9 [2022-11-19 07:23:53,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:53,019 INFO L225 Difference]: With dead ends: 2887 [2022-11-19 07:23:53,019 INFO L226 Difference]: Without dead ends: 2887 [2022-11-19 07:23:53,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:23:53,019 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 38 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:53,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 12 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:23:53,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2022-11-19 07:23:53,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 2832. [2022-11-19 07:23:53,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2832 states, 2813 states have (on average 3.994312122289371) internal successors, (11236), 2831 states have internal predecessors, (11236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:23:53,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 11236 transitions. [2022-11-19 07:23:53,082 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 11236 transitions. Word has length 9 [2022-11-19 07:23:53,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:53,082 INFO L495 AbstractCegarLoop]: Abstraction has 2832 states and 11236 transitions. [2022-11-19 07:23:53,082 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) [2022-11-19 07:23:53,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 11236 transitions. [2022-11-19 07:23:53,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:23:53,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:53,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:23:53,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Forceful destruction successful, exit code 0 [2022-11-19 07:23:53,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:23:53,284 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:23:53,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:53,284 INFO L85 PathProgramCache]: Analyzing trace with hash -549450619, now seen corresponding path program 1 times [2022-11-19 07:23:53,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:23:53,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [227990575] [2022-11-19 07:23:53,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:53,285 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:23:53,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:23:53,286 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:23:53,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-19 07:23:53,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:53,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:23:53,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:23:53,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:23:53,807 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-19 07:23:53,807 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-19 07:23:53,923 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:23:53,923 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 [2022-11-19 07:23:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:23:54,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:23:54,045 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:23:54,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [227990575] [2022-11-19 07:23:54,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [227990575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:23:54,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:23:54,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:23:54,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302278147] [2022-11-19 07:23:54,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:23:54,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:23:54,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:23:54,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:23:54,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:23:54,046 INFO L87 Difference]: Start difference. First operand 2832 states and 11236 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:23:54,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:54,209 INFO L93 Difference]: Finished difference Result 2828 states and 11218 transitions. [2022-11-19 07:23:54,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:23:54,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 07:23:54,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:54,218 INFO L225 Difference]: With dead ends: 2828 [2022-11-19 07:23:54,218 INFO L226 Difference]: Without dead ends: 2828 [2022-11-19 07:23:54,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:23:54,219 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:54,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-19 07:23:54,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2828 states. [2022-11-19 07:23:54,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2828 to 2824. [2022-11-19 07:23:54,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2824 states, 2805 states have (on average 3.9928698752228162) internal successors, (11200), 2823 states have internal predecessors, (11200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:23:54,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 11200 transitions. [2022-11-19 07:23:54,270 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 11200 transitions. Word has length 10 [2022-11-19 07:23:54,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:54,270 INFO L495 AbstractCegarLoop]: Abstraction has 2824 states and 11200 transitions. [2022-11-19 07:23:54,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:23:54,270 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 11200 transitions. [2022-11-19 07:23:54,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:23:54,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:54,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:23:54,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-19 07:23:54,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:23:54,475 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:23:54,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:54,476 INFO L85 PathProgramCache]: Analyzing trace with hash -549449131, now seen corresponding path program 1 times [2022-11-19 07:23:54,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:23:54,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1590851175] [2022-11-19 07:23:54,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:54,476 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:23:54,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:23:54,477 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:23:54,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:23:54,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:54,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:23:54,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:23:54,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:23:54,968 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-19 07:23:54,969 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-19 07:23:55,102 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:23:55,103 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 [2022-11-19 07:23:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:23:55,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:23:55,253 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:23:55,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1590851175] [2022-11-19 07:23:55,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1590851175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:23:55,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:23:55,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:23:55,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771657580] [2022-11-19 07:23:55,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:23:55,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:23:55,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:23:55,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:23:55,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:23:55,254 INFO L87 Difference]: Start difference. First operand 2824 states and 11200 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:23:55,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:23:55,417 INFO L93 Difference]: Finished difference Result 2830 states and 11222 transitions. [2022-11-19 07:23:55,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:23:55,417 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 07:23:55,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:23:55,426 INFO L225 Difference]: With dead ends: 2830 [2022-11-19 07:23:55,427 INFO L226 Difference]: Without dead ends: 2830 [2022-11-19 07:23:55,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:23:55,427 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:23:55,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-11-19 07:23:55,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2830 states. [2022-11-19 07:23:55,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2830 to 2830. [2022-11-19 07:23:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2830 states, 2811 states have (on average 3.992173603699751) internal successors, (11222), 2829 states have internal predecessors, (11222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:23:55,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2830 states to 2830 states and 11222 transitions. [2022-11-19 07:23:55,494 INFO L78 Accepts]: Start accepts. Automaton has 2830 states and 11222 transitions. Word has length 10 [2022-11-19 07:23:55,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:23:55,494 INFO L495 AbstractCegarLoop]: Abstraction has 2830 states and 11222 transitions. [2022-11-19 07:23:55,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:23:55,495 INFO L276 IsEmpty]: Start isEmpty. Operand 2830 states and 11222 transitions. [2022-11-19 07:23:55,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:23:55,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:23:55,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:23:55,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:23:55,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:23:55,697 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:23:55,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:23:55,697 INFO L85 PathProgramCache]: Analyzing trace with hash -549448138, now seen corresponding path program 1 times [2022-11-19 07:23:55,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:23:55,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706491634] [2022-11-19 07:23:55,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:55,698 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:23:55,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:23:55,699 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:23:55,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-19 07:23:55,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:55,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:23:55,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:23:55,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-19 07:23:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:23:56,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:23:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:23:57,429 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:23:57,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706491634] [2022-11-19 07:23:57,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706491634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:23:57,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1185858299] [2022-11-19 07:23:57,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:57,429 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:23:57,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:23:57,431 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:23:57,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-19 07:23:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:57,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:23:57,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:23:57,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-19 07:23:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:23:58,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:23:58,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:23:58,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1185858299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:23:58,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273546252] [2022-11-19 07:23:58,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:23:58,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:23:58,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:23:58,969 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:23:58,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-19 07:23:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:23:59,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:23:59,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:23:59,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-19 07:23:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:23:59,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:23:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:23:59,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273546252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:23:59,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:23:59,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-11-19 07:23:59,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699223539] [2022-11-19 07:23:59,949 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:23:59,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 07:23:59,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:23:59,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 07:23:59,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:23:59,950 INFO L87 Difference]: Start difference. First operand 2830 states and 11222 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:02,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:02,540 INFO L93 Difference]: Finished difference Result 2854 states and 11316 transitions. [2022-11-19 07:24:02,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:24:02,541 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 11 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 10 [2022-11-19 07:24:02,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:02,550 INFO L225 Difference]: With dead ends: 2854 [2022-11-19 07:24:02,550 INFO L226 Difference]: Without dead ends: 2854 [2022-11-19 07:24:02,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:24:02,551 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:02,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 56 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 138 Unchecked, 0.4s Time] [2022-11-19 07:24:02,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2854 states. [2022-11-19 07:24:02,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2854 to 2820. [2022-11-19 07:24:02,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2820 states, 2801 states have (on average 3.99928596929668) internal successors, (11202), 2819 states have internal predecessors, (11202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:02,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2820 states to 2820 states and 11202 transitions. [2022-11-19 07:24:02,611 INFO L78 Accepts]: Start accepts. Automaton has 2820 states and 11202 transitions. Word has length 10 [2022-11-19 07:24:02,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:02,612 INFO L495 AbstractCegarLoop]: Abstraction has 2820 states and 11202 transitions. [2022-11-19 07:24:02,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:02,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2820 states and 11202 transitions. [2022-11-19 07:24:02,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:24:02,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:02,612 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:02,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (62)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:02,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:03,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:03,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:03,213 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:24:03,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:03,214 INFO L85 PathProgramCache]: Analyzing trace with hash -549458772, now seen corresponding path program 1 times [2022-11-19 07:24:03,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:24:03,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1399261962] [2022-11-19 07:24:03,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:03,214 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:03,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:24:03,215 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:24:03,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-19 07:24:03,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:03,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:24:03,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:03,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:24:03,742 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-19 07:24:03,742 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-19 07:24:03,865 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:24:03,865 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 [2022-11-19 07:24:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:24:03,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:03,978 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:24:03,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1399261962] [2022-11-19 07:24:03,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1399261962] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:03,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:03,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:24:03,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25951854] [2022-11-19 07:24:03,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:03,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:24:03,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:24:03,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:24:03,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:24:03,980 INFO L87 Difference]: Start difference. First operand 2820 states and 11202 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:04,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:04,130 INFO L93 Difference]: Finished difference Result 2821 states and 11205 transitions. [2022-11-19 07:24:04,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:24:04,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 07:24:04,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:04,138 INFO L225 Difference]: With dead ends: 2821 [2022-11-19 07:24:04,138 INFO L226 Difference]: Without dead ends: 2821 [2022-11-19 07:24:04,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:24:04,139 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:04,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-11-19 07:24:04,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2821 states. [2022-11-19 07:24:04,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2821 to 2821. [2022-11-19 07:24:04,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2821 states, 2802 states have (on average 3.998929336188437) internal successors, (11205), 2820 states have internal predecessors, (11205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:04,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2821 states to 2821 states and 11205 transitions. [2022-11-19 07:24:04,189 INFO L78 Accepts]: Start accepts. Automaton has 2821 states and 11205 transitions. Word has length 10 [2022-11-19 07:24:04,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:04,189 INFO L495 AbstractCegarLoop]: Abstraction has 2821 states and 11205 transitions. [2022-11-19 07:24:04,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:04,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2821 states and 11205 transitions. [2022-11-19 07:24:04,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:24:04,189 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:04,190 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:04,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:04,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:04,390 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:24:04,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:04,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1284605251, now seen corresponding path program 1 times [2022-11-19 07:24:04,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:24:04,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [791819125] [2022-11-19 07:24:04,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:04,391 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:04,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:24:04,392 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:24:04,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-19 07:24:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:04,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:24:04,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:04,905 INFO L321 Elim1Store]: treesize reduction 178, result has 20.2 percent of original size [2022-11-19 07:24:04,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 7 case distinctions, treesize of input 49 treesize of output 78 [2022-11-19 07:24:05,316 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-19 07:24:05,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 68 [2022-11-19 07:24:05,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:24:05,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:05,858 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:24:05,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [791819125] [2022-11-19 07:24:05,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [791819125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:05,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:05,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:24:05,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433131164] [2022-11-19 07:24:05,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:05,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:24:05,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:24:05,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:24:05,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:05,859 INFO L87 Difference]: Start difference. First operand 2821 states and 11205 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) [2022-11-19 07:24:06,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:06,058 INFO L93 Difference]: Finished difference Result 2821 states and 11205 transitions. [2022-11-19 07:24:06,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:24:06,059 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 10 [2022-11-19 07:24:06,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:06,070 INFO L225 Difference]: With dead ends: 2821 [2022-11-19 07:24:06,070 INFO L226 Difference]: Without dead ends: 2821 [2022-11-19 07:24:06,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:06,071 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:06,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-11-19 07:24:06,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2821 states. [2022-11-19 07:24:06,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2821 to 2819. [2022-11-19 07:24:06,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2801 states have (on average 3.99964298464834) internal successors, (11203), 2818 states have internal predecessors, (11203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:06,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 11203 transitions. [2022-11-19 07:24:06,126 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 11203 transitions. Word has length 10 [2022-11-19 07:24:06,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:06,126 INFO L495 AbstractCegarLoop]: Abstraction has 2819 states and 11203 transitions. [2022-11-19 07:24:06,126 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) [2022-11-19 07:24:06,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 11203 transitions. [2022-11-19 07:24:06,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:24:06,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:06,127 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:06,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:06,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:06,331 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:24:06,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:06,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1609662958, now seen corresponding path program 1 times [2022-11-19 07:24:06,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:24:06,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733596473] [2022-11-19 07:24:06,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:06,332 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:06,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:24:06,333 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:24:06,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:24:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:06,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:24:06,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:06,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:24:06,826 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-19 07:24:06,826 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-19 07:24:06,964 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:24:06,965 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 [2022-11-19 07:24:07,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:24:07,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:07,085 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:24:07,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733596473] [2022-11-19 07:24:07,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733596473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:07,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:07,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:24:07,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761368318] [2022-11-19 07:24:07,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:07,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:24:07,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:24:07,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:24:07,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:24:07,087 INFO L87 Difference]: Start difference. First operand 2819 states and 11203 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:07,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:07,243 INFO L93 Difference]: Finished difference Result 2820 states and 11205 transitions. [2022-11-19 07:24:07,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:24:07,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 07:24:07,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:07,252 INFO L225 Difference]: With dead ends: 2820 [2022-11-19 07:24:07,252 INFO L226 Difference]: Without dead ends: 2820 [2022-11-19 07:24:07,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:24:07,253 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:07,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-19 07:24:07,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2820 states. [2022-11-19 07:24:07,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2820 to 2820. [2022-11-19 07:24:07,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2820 states, 2802 states have (on average 3.998929336188437) internal successors, (11205), 2819 states have internal predecessors, (11205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:07,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2820 states to 2820 states and 11205 transitions. [2022-11-19 07:24:07,309 INFO L78 Accepts]: Start accepts. Automaton has 2820 states and 11205 transitions. Word has length 10 [2022-11-19 07:24:07,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:07,309 INFO L495 AbstractCegarLoop]: Abstraction has 2820 states and 11205 transitions. [2022-11-19 07:24:07,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:07,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2820 states and 11205 transitions. [2022-11-19 07:24:07,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:24:07,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:07,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:07,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 07:24:07,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:07,510 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:24:07,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:07,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1609653224, now seen corresponding path program 1 times [2022-11-19 07:24:07,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:24:07,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404829710] [2022-11-19 07:24:07,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:07,513 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:07,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:24:07,514 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:24:07,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-19 07:24:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:07,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:24:07,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:08,018 INFO L321 Elim1Store]: treesize reduction 168, result has 21.1 percent of original size [2022-11-19 07:24:08,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 67 [2022-11-19 07:24:08,469 INFO L321 Elim1Store]: treesize reduction 38, result has 33.3 percent of original size [2022-11-19 07:24:08,469 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 25 treesize of output 40 [2022-11-19 07:24:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:24:08,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:08,767 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:24:08,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404829710] [2022-11-19 07:24:08,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404829710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:08,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:08,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:24:08,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467848068] [2022-11-19 07:24:08,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:08,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:24:08,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:24:08,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:24:08,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:08,769 INFO L87 Difference]: Start difference. First operand 2820 states and 11205 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) [2022-11-19 07:24:08,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:08,933 INFO L93 Difference]: Finished difference Result 2823 states and 11216 transitions. [2022-11-19 07:24:08,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:24:08,934 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 10 [2022-11-19 07:24:08,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:08,943 INFO L225 Difference]: With dead ends: 2823 [2022-11-19 07:24:08,944 INFO L226 Difference]: Without dead ends: 2823 [2022-11-19 07:24:08,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:08,944 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:08,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2022-11-19 07:24:08,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2022-11-19 07:24:08,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2822. [2022-11-19 07:24:09,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2822 states, 2804 states have (on average 3.9989300998573465) internal successors, (11213), 2821 states have internal predecessors, (11213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:09,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2822 states to 2822 states and 11213 transitions. [2022-11-19 07:24:09,015 INFO L78 Accepts]: Start accepts. Automaton has 2822 states and 11213 transitions. Word has length 10 [2022-11-19 07:24:09,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:09,015 INFO L495 AbstractCegarLoop]: Abstraction has 2822 states and 11213 transitions. [2022-11-19 07:24:09,015 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) [2022-11-19 07:24:09,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2822 states and 11213 transitions. [2022-11-19 07:24:09,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:24:09,016 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:09,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:09,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:09,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:09,232 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:24:09,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:09,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1609653317, now seen corresponding path program 1 times [2022-11-19 07:24:09,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:24:09,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865217529] [2022-11-19 07:24:09,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:09,233 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:09,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:24:09,234 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:24:09,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-19 07:24:09,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:09,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:24:09,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:09,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:24:09,723 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-19 07:24:09,724 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-19 07:24:09,856 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:24:09,857 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 [2022-11-19 07:24:09,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:24:09,954 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:09,955 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:24:09,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1865217529] [2022-11-19 07:24:09,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1865217529] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:09,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:09,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:24:09,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706750778] [2022-11-19 07:24:09,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:09,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:24:09,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:24:09,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:24:09,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:24:09,956 INFO L87 Difference]: Start difference. First operand 2822 states and 11213 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:10,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:10,114 INFO L93 Difference]: Finished difference Result 2826 states and 11219 transitions. [2022-11-19 07:24:10,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:24:10,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-19 07:24:10,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:10,123 INFO L225 Difference]: With dead ends: 2826 [2022-11-19 07:24:10,123 INFO L226 Difference]: Without dead ends: 2826 [2022-11-19 07:24:10,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:24:10,123 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:10,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-11-19 07:24:10,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2022-11-19 07:24:10,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2826. [2022-11-19 07:24:10,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2826 states, 2808 states have (on average 3.9953703703703702) internal successors, (11219), 2825 states have internal predecessors, (11219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:10,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2826 states to 2826 states and 11219 transitions. [2022-11-19 07:24:10,175 INFO L78 Accepts]: Start accepts. Automaton has 2826 states and 11219 transitions. Word has length 10 [2022-11-19 07:24:10,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:10,175 INFO L495 AbstractCegarLoop]: Abstraction has 2826 states and 11219 transitions. [2022-11-19 07:24:10,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:10,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2826 states and 11219 transitions. [2022-11-19 07:24:10,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:24:10,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:10,176 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:10,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:10,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:10,377 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:24:10,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:10,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1608514904, now seen corresponding path program 2 times [2022-11-19 07:24:10,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:24:10,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1009971966] [2022-11-19 07:24:10,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:24:10,378 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:10,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:24:10,379 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:24:10,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-19 07:24:10,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 07:24:10,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:24:10,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:24:10,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:10,857 INFO L321 Elim1Store]: treesize reduction 168, result has 21.1 percent of original size [2022-11-19 07:24:10,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 67 [2022-11-19 07:24:11,302 INFO L321 Elim1Store]: treesize reduction 38, result has 33.3 percent of original size [2022-11-19 07:24:11,302 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 25 treesize of output 40 [2022-11-19 07:24:11,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:24:11,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:11,617 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:24:11,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1009971966] [2022-11-19 07:24:11,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1009971966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:11,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:11,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:24:11,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725467040] [2022-11-19 07:24:11,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:11,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:24:11,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:24:11,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:24:11,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:11,620 INFO L87 Difference]: Start difference. First operand 2826 states and 11219 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) [2022-11-19 07:24:11,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:11,790 INFO L93 Difference]: Finished difference Result 2831 states and 11238 transitions. [2022-11-19 07:24:11,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:24:11,790 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 10 [2022-11-19 07:24:11,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:11,798 INFO L225 Difference]: With dead ends: 2831 [2022-11-19 07:24:11,799 INFO L226 Difference]: Without dead ends: 2831 [2022-11-19 07:24:11,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:11,799 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:11,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2022-11-19 07:24:11,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2022-11-19 07:24:11,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 2827. [2022-11-19 07:24:11,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2827 states, 2809 states have (on average 3.99501601993592) internal successors, (11222), 2826 states have internal predecessors, (11222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:11,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2827 states to 2827 states and 11222 transitions. [2022-11-19 07:24:11,861 INFO L78 Accepts]: Start accepts. Automaton has 2827 states and 11222 transitions. Word has length 10 [2022-11-19 07:24:11,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:11,861 INFO L495 AbstractCegarLoop]: Abstraction has 2827 states and 11222 transitions. [2022-11-19 07:24:11,861 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) [2022-11-19 07:24:11,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2827 states and 11222 transitions. [2022-11-19 07:24:11,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:24:11,862 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:11,862 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:11,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:12,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:12,062 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:24:12,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:12,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1402553384, now seen corresponding path program 3 times [2022-11-19 07:24:12,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:24:12,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [846874627] [2022-11-19 07:24:12,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:24:12,063 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:12,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:24:12,064 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:24:12,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-19 07:24:12,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 07:24:12,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:24:12,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:24:12,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:12,531 INFO L321 Elim1Store]: treesize reduction 168, result has 21.1 percent of original size [2022-11-19 07:24:12,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 67 [2022-11-19 07:24:12,984 INFO L321 Elim1Store]: treesize reduction 38, result has 33.3 percent of original size [2022-11-19 07:24:12,985 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 25 treesize of output 40 [2022-11-19 07:24:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:24:13,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:13,286 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:24:13,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [846874627] [2022-11-19 07:24:13,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [846874627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:13,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:13,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:24:13,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838302198] [2022-11-19 07:24:13,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:13,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:24:13,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:24:13,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:24:13,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:13,288 INFO L87 Difference]: Start difference. First operand 2827 states and 11222 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) [2022-11-19 07:24:13,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:13,456 INFO L93 Difference]: Finished difference Result 2828 states and 11225 transitions. [2022-11-19 07:24:13,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:24:13,457 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 10 [2022-11-19 07:24:13,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:13,467 INFO L225 Difference]: With dead ends: 2828 [2022-11-19 07:24:13,467 INFO L226 Difference]: Without dead ends: 2828 [2022-11-19 07:24:13,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:13,468 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:13,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-11-19 07:24:13,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2828 states. [2022-11-19 07:24:13,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2828 to 2822. [2022-11-19 07:24:13,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2822 states, 2804 states have (on average 3.995363766048502) internal successors, (11203), 2821 states have internal predecessors, (11203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:13,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2822 states to 2822 states and 11203 transitions. [2022-11-19 07:24:13,546 INFO L78 Accepts]: Start accepts. Automaton has 2822 states and 11203 transitions. Word has length 10 [2022-11-19 07:24:13,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:13,547 INFO L495 AbstractCegarLoop]: Abstraction has 2822 states and 11203 transitions. [2022-11-19 07:24:13,547 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) [2022-11-19 07:24:13,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2822 states and 11203 transitions. [2022-11-19 07:24:13,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:24:13,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:13,550 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:13,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:13,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:13,765 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:24:13,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:13,765 INFO L85 PathProgramCache]: Analyzing trace with hash -2061526841, now seen corresponding path program 2 times [2022-11-19 07:24:13,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:24:13,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252482387] [2022-11-19 07:24:13,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:24:13,766 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:13,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:24:13,768 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:24:13,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-19 07:24:14,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 07:24:14,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:24:14,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:24:14,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:14,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-19 07:24:14,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:24:14,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:14,214 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:24:14,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252482387] [2022-11-19 07:24:14,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1252482387] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:14,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:14,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:24:14,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067838437] [2022-11-19 07:24:14,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:14,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:24:14,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:24:14,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:24:14,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:24:14,216 INFO L87 Difference]: Start difference. First operand 2822 states and 11203 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:14,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:14,563 INFO L93 Difference]: Finished difference Result 2121 states and 8220 transitions. [2022-11-19 07:24:14,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:24:14,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:24:14,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:14,570 INFO L225 Difference]: With dead ends: 2121 [2022-11-19 07:24:14,570 INFO L226 Difference]: Without dead ends: 2121 [2022-11-19 07:24:14,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:14,571 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 66 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:14,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 6 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:24:14,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2022-11-19 07:24:14,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 2089. [2022-11-19 07:24:14,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2082 states have (on average 3.8972142170989432) internal successors, (8114), 2088 states have internal predecessors, (8114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:14,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 8114 transitions. [2022-11-19 07:24:14,617 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 8114 transitions. Word has length 11 [2022-11-19 07:24:14,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:14,617 INFO L495 AbstractCegarLoop]: Abstraction has 2089 states and 8114 transitions. [2022-11-19 07:24:14,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:14,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 8114 transitions. [2022-11-19 07:24:14,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:24:14,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:14,618 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:14,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:14,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:14,819 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:24:14,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:14,819 INFO L85 PathProgramCache]: Analyzing trace with hash 146899953, now seen corresponding path program 1 times [2022-11-19 07:24:14,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:24:14,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290363983] [2022-11-19 07:24:14,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:14,820 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:14,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:24:14,821 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:24:14,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-19 07:24:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:15,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:24:15,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:15,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:24:15,349 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-19 07:24:15,350 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-19 07:24:15,483 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:24:15,483 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 [2022-11-19 07:24:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:24:15,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:15,619 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:24:15,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290363983] [2022-11-19 07:24:15,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290363983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:15,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:15,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:24:15,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831927734] [2022-11-19 07:24:15,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:15,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:24:15,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:24:15,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:24:15,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:24:15,621 INFO L87 Difference]: Start difference. First operand 2089 states and 8114 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:15,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:15,762 INFO L93 Difference]: Finished difference Result 2087 states and 8110 transitions. [2022-11-19 07:24:15,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:24:15,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:24:15,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:15,768 INFO L225 Difference]: With dead ends: 2087 [2022-11-19 07:24:15,768 INFO L226 Difference]: Without dead ends: 2087 [2022-11-19 07:24:15,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:24:15,769 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:15,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-11-19 07:24:15,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2087 states. [2022-11-19 07:24:15,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2087 to 2085. [2022-11-19 07:24:15,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2085 states, 2078 states have (on average 3.900866217516843) internal successors, (8106), 2084 states have internal predecessors, (8106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:15,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2085 states to 2085 states and 8106 transitions. [2022-11-19 07:24:15,811 INFO L78 Accepts]: Start accepts. Automaton has 2085 states and 8106 transitions. Word has length 11 [2022-11-19 07:24:15,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:15,811 INFO L495 AbstractCegarLoop]: Abstraction has 2085 states and 8106 transitions. [2022-11-19 07:24:15,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:15,811 INFO L276 IsEmpty]: Start isEmpty. Operand 2085 states and 8106 transitions. [2022-11-19 07:24:15,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:24:15,812 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:15,812 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:15,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-11-19 07:24:16,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:16,015 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:24:16,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:16,016 INFO L85 PathProgramCache]: Analyzing trace with hash 569027996, now seen corresponding path program 1 times [2022-11-19 07:24:16,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:24:16,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [107846956] [2022-11-19 07:24:16,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:16,016 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:16,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:24:16,017 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:24:16,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-11-19 07:24:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:16,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:24:16,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:16,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:24:16,514 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-19 07:24:16,515 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-19 07:24:17,367 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-19 07:24:17,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-19 07:24:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:18,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:18,681 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:24:18,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [107846956] [2022-11-19 07:24:18,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [107846956] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:18,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:18,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:24:18,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667752955] [2022-11-19 07:24:18,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:18,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:24:18,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:24:18,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:24:18,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:24:18,683 INFO L87 Difference]: Start difference. First operand 2085 states and 8106 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:18,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:18,860 INFO L93 Difference]: Finished difference Result 2085 states and 8105 transitions. [2022-11-19 07:24:18,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:24:18,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:24:18,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:18,867 INFO L225 Difference]: With dead ends: 2085 [2022-11-19 07:24:18,867 INFO L226 Difference]: Without dead ends: 2085 [2022-11-19 07:24:18,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:24:18,868 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:18,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2022-11-19 07:24:18,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2022-11-19 07:24:18,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 2085. [2022-11-19 07:24:18,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2085 states, 2078 states have (on average 3.9003849855630413) internal successors, (8105), 2084 states have internal predecessors, (8105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:18,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2085 states to 2085 states and 8105 transitions. [2022-11-19 07:24:18,914 INFO L78 Accepts]: Start accepts. Automaton has 2085 states and 8105 transitions. Word has length 11 [2022-11-19 07:24:18,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:18,914 INFO L495 AbstractCegarLoop]: Abstraction has 2085 states and 8105 transitions. [2022-11-19 07:24:18,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:18,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2085 states and 8105 transitions. [2022-11-19 07:24:18,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:24:18,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:18,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:18,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:19,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:19,115 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:24:19,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:19,116 INFO L85 PathProgramCache]: Analyzing trace with hash 792084173, now seen corresponding path program 1 times [2022-11-19 07:24:19,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:24:19,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030674911] [2022-11-19 07:24:19,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:19,117 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:19,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:24:19,118 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:24:19,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-19 07:24:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:19,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:24:19,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:19,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:19,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:19,424 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:24:19,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030674911] [2022-11-19 07:24:19,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030674911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:19,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:19,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:24:19,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200198198] [2022-11-19 07:24:19,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:19,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:24:19,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:24:19,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:24:19,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:24:19,426 INFO L87 Difference]: Start difference. First operand 2085 states and 8105 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:19,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:19,673 INFO L93 Difference]: Finished difference Result 1685 states and 6265 transitions. [2022-11-19 07:24:19,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:24:19,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:24:19,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:19,679 INFO L225 Difference]: With dead ends: 1685 [2022-11-19 07:24:19,679 INFO L226 Difference]: Without dead ends: 1685 [2022-11-19 07:24:19,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:24:19,680 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:19,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 6 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:24:19,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2022-11-19 07:24:19,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1685. [2022-11-19 07:24:19,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1685 states, 1679 states have (on average 3.731387730792138) internal successors, (6265), 1684 states have internal predecessors, (6265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:19,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1685 states to 1685 states and 6265 transitions. [2022-11-19 07:24:19,725 INFO L78 Accepts]: Start accepts. Automaton has 1685 states and 6265 transitions. Word has length 11 [2022-11-19 07:24:19,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:19,725 INFO L495 AbstractCegarLoop]: Abstraction has 1685 states and 6265 transitions. [2022-11-19 07:24:19,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:19,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1685 states and 6265 transitions. [2022-11-19 07:24:19,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:24:19,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:19,726 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:19,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:19,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:19,927 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:24:19,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:19,927 INFO L85 PathProgramCache]: Analyzing trace with hash -960943090, now seen corresponding path program 1 times [2022-11-19 07:24:19,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:24:19,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934708099] [2022-11-19 07:24:19,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:19,928 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:19,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:24:19,930 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:24:19,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Waiting until timeout for monitored process [2022-11-19 07:24:20,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:20,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:24:20,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:20,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:24:20,577 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-19 07:24:20,577 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-19 07:24:20,720 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:24:20,720 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 [2022-11-19 07:24:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:24:20,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:20,853 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:24:20,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934708099] [2022-11-19 07:24:20,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [934708099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:20,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:20,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:24:20,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158855022] [2022-11-19 07:24:20,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:20,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:24:20,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:24:20,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:24:20,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:24:20,855 INFO L87 Difference]: Start difference. First operand 1685 states and 6265 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:20,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:20,982 INFO L93 Difference]: Finished difference Result 1685 states and 6266 transitions. [2022-11-19 07:24:20,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:24:20,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:24:20,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:20,988 INFO L225 Difference]: With dead ends: 1685 [2022-11-19 07:24:20,988 INFO L226 Difference]: Without dead ends: 1685 [2022-11-19 07:24:20,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:24:20,989 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:20,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-19 07:24:20,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1685 states. [2022-11-19 07:24:21,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1685 to 1683. [2022-11-19 07:24:21,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1683 states, 1677 states have (on average 3.7310673822301728) internal successors, (6257), 1682 states have internal predecessors, (6257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:21,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1683 states to 1683 states and 6257 transitions. [2022-11-19 07:24:21,024 INFO L78 Accepts]: Start accepts. Automaton has 1683 states and 6257 transitions. Word has length 11 [2022-11-19 07:24:21,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:21,024 INFO L495 AbstractCegarLoop]: Abstraction has 1683 states and 6257 transitions. [2022-11-19 07:24:21,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:21,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1683 states and 6257 transitions. [2022-11-19 07:24:21,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:24:21,025 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:21,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:21,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (75)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:21,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:21,227 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:24:21,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:21,227 INFO L85 PathProgramCache]: Analyzing trace with hash -960941602, now seen corresponding path program 1 times [2022-11-19 07:24:21,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:24:21,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1493509408] [2022-11-19 07:24:21,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:21,228 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:21,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:24:21,229 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:24:21,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-19 07:24:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:21,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:24:21,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:21,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:24:21,801 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-19 07:24:21,801 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-19 07:24:22,749 INFO L321 Elim1Store]: treesize reduction 78, result has 22.0 percent of original size [2022-11-19 07:24:22,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 28 treesize of output 44 [2022-11-19 07:24:23,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:24:23,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:23,323 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:24:23,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1493509408] [2022-11-19 07:24:23,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1493509408] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:23,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:23,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:24:23,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646473062] [2022-11-19 07:24:23,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:23,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:24:23,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:24:23,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:24:23,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:24:23,325 INFO L87 Difference]: Start difference. First operand 1683 states and 6257 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:23,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:23,436 INFO L93 Difference]: Finished difference Result 1689 states and 6275 transitions. [2022-11-19 07:24:23,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:24:23,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:24:23,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:23,442 INFO L225 Difference]: With dead ends: 1689 [2022-11-19 07:24:23,442 INFO L226 Difference]: Without dead ends: 1689 [2022-11-19 07:24:23,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:24:23,442 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:23,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-19 07:24:23,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2022-11-19 07:24:23,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1687. [2022-11-19 07:24:23,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1681 states have (on average 3.7305175490779297) internal successors, (6271), 1686 states have internal predecessors, (6271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:23,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 6271 transitions. [2022-11-19 07:24:23,478 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 6271 transitions. Word has length 11 [2022-11-19 07:24:23,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:23,478 INFO L495 AbstractCegarLoop]: Abstraction has 1687 states and 6271 transitions. [2022-11-19 07:24:23,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:23,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 6271 transitions. [2022-11-19 07:24:23,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:24:23,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:23,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:23,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Ended with exit code 0 [2022-11-19 07:24:23,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:23,680 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:24:23,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:23,680 INFO L85 PathProgramCache]: Analyzing trace with hash -960951336, now seen corresponding path program 1 times [2022-11-19 07:24:23,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:24:23,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316337557] [2022-11-19 07:24:23,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:23,681 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:23,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:24:23,682 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:24:23,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-19 07:24:24,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:24,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:24:24,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:24,237 INFO L321 Elim1Store]: treesize reduction 168, result has 21.1 percent of original size [2022-11-19 07:24:24,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 67 [2022-11-19 07:24:24,697 INFO L321 Elim1Store]: treesize reduction 38, result has 33.3 percent of original size [2022-11-19 07:24:24,698 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 25 treesize of output 40 [2022-11-19 07:24:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:24:25,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:25,015 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:24:25,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316337557] [2022-11-19 07:24:25,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316337557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:25,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:25,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:24:25,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469613250] [2022-11-19 07:24:25,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:25,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:24:25,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:24:25,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:24:25,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:25,017 INFO L87 Difference]: Start difference. First operand 1687 states and 6271 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:25,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:25,124 INFO L93 Difference]: Finished difference Result 1694 states and 6300 transitions. [2022-11-19 07:24:25,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:24:25,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:24:25,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:25,129 INFO L225 Difference]: With dead ends: 1694 [2022-11-19 07:24:25,129 INFO L226 Difference]: Without dead ends: 1694 [2022-11-19 07:24:25,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:25,130 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:25,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 21 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 54 Unchecked, 0.1s Time] [2022-11-19 07:24:25,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2022-11-19 07:24:25,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1690. [2022-11-19 07:24:25,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1684 states have (on average 3.7327790973871733) internal successors, (6286), 1689 states have internal predecessors, (6286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:25,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 6286 transitions. [2022-11-19 07:24:25,158 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 6286 transitions. Word has length 11 [2022-11-19 07:24:25,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:25,158 INFO L495 AbstractCegarLoop]: Abstraction has 1690 states and 6286 transitions. [2022-11-19 07:24:25,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:25,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 6286 transitions. [2022-11-19 07:24:25,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:24:25,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:25,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:25,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:25,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:25,360 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:24:25,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:25,360 INFO L85 PathProgramCache]: Analyzing trace with hash -960951243, now seen corresponding path program 1 times [2022-11-19 07:24:25,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:24:25,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [417353904] [2022-11-19 07:24:25,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:25,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:25,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:24:25,362 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:24:25,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-19 07:24:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:25,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:24:25,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:25,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:24:25,916 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-11-19 07:24:25,916 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 5 case distinctions, treesize of input 36 treesize of output 63 [2022-11-19 07:24:26,058 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:24:26,058 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 [2022-11-19 07:24:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:24:26,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:26,192 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:24:26,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [417353904] [2022-11-19 07:24:26,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [417353904] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:26,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:26,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 07:24:26,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792087333] [2022-11-19 07:24:26,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:26,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:24:26,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:24:26,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:24:26,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:24:26,193 INFO L87 Difference]: Start difference. First operand 1690 states and 6286 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:26,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:26,311 INFO L93 Difference]: Finished difference Result 1694 states and 6293 transitions. [2022-11-19 07:24:26,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:24:26,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:24:26,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:26,317 INFO L225 Difference]: With dead ends: 1694 [2022-11-19 07:24:26,317 INFO L226 Difference]: Without dead ends: 1694 [2022-11-19 07:24:26,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:24:26,318 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:26,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 12 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-11-19 07:24:26,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2022-11-19 07:24:26,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1694. [2022-11-19 07:24:26,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1688 states have (on average 3.728080568720379) internal successors, (6293), 1693 states have internal predecessors, (6293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:26,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 6293 transitions. [2022-11-19 07:24:26,350 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 6293 transitions. Word has length 11 [2022-11-19 07:24:26,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:26,350 INFO L495 AbstractCegarLoop]: Abstraction has 1694 states and 6293 transitions. [2022-11-19 07:24:26,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:26,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 6293 transitions. [2022-11-19 07:24:26,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:24:26,352 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:26,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:26,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:26,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:26,567 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:24:26,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:26,568 INFO L85 PathProgramCache]: Analyzing trace with hash -962089656, now seen corresponding path program 2 times [2022-11-19 07:24:26,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:24:26,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656374746] [2022-11-19 07:24:26,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:24:26,568 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:26,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:24:26,569 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:24:26,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-19 07:24:26,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-19 07:24:26,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:24:26,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:24:26,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:27,071 INFO L321 Elim1Store]: treesize reduction 168, result has 21.1 percent of original size [2022-11-19 07:24:27,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 67 [2022-11-19 07:24:27,525 INFO L321 Elim1Store]: treesize reduction 38, result has 33.3 percent of original size [2022-11-19 07:24:27,525 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 25 treesize of output 40 [2022-11-19 07:24:27,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:24:27,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:27,846 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:24:27,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656374746] [2022-11-19 07:24:27,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656374746] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:27,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:27,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:24:27,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918505500] [2022-11-19 07:24:27,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:27,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:24:27,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:24:27,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:24:27,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:27,848 INFO L87 Difference]: Start difference. First operand 1694 states and 6293 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:28,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:28,003 INFO L93 Difference]: Finished difference Result 1919 states and 7439 transitions. [2022-11-19 07:24:28,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:24:28,003 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:24:28,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:28,011 INFO L225 Difference]: With dead ends: 1919 [2022-11-19 07:24:28,012 INFO L226 Difference]: Without dead ends: 1919 [2022-11-19 07:24:28,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:28,012 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:28,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 29 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 90 Unchecked, 0.1s Time] [2022-11-19 07:24:28,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2022-11-19 07:24:28,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1702. [2022-11-19 07:24:28,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1702 states, 1696 states have (on average 3.7275943396226414) internal successors, (6322), 1701 states have internal predecessors, (6322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:28,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1702 states to 1702 states and 6322 transitions. [2022-11-19 07:24:28,057 INFO L78 Accepts]: Start accepts. Automaton has 1702 states and 6322 transitions. Word has length 11 [2022-11-19 07:24:28,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:28,058 INFO L495 AbstractCegarLoop]: Abstraction has 1702 states and 6322 transitions. [2022-11-19 07:24:28,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:28,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1702 states and 6322 transitions. [2022-11-19 07:24:28,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:24:28,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:28,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:28,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:28,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:28,274 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:24:28,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:28,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1168051176, now seen corresponding path program 3 times [2022-11-19 07:24:28,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:24:28,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382980928] [2022-11-19 07:24:28,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:24:28,275 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:28,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:24:28,276 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:24:28,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Waiting until timeout for monitored process [2022-11-19 07:24:28,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-19 07:24:28,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:24:28,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:24:28,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:28,795 INFO L321 Elim1Store]: treesize reduction 168, result has 21.1 percent of original size [2022-11-19 07:24:28,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 67 [2022-11-19 07:24:28,915 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 07:24:28,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-19 07:24:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:24:29,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:29,127 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:24:29,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382980928] [2022-11-19 07:24:29,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382980928] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:29,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:29,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:24:29,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466681592] [2022-11-19 07:24:29,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:29,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:24:29,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:24:29,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:24:29,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:29,128 INFO L87 Difference]: Start difference. First operand 1702 states and 6322 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:29,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:29,371 INFO L93 Difference]: Finished difference Result 1930 states and 7477 transitions. [2022-11-19 07:24:29,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:24:29,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:24:29,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:29,377 INFO L225 Difference]: With dead ends: 1930 [2022-11-19 07:24:29,377 INFO L226 Difference]: Without dead ends: 1930 [2022-11-19 07:24:29,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:29,378 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:29,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 24 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 33 Unchecked, 0.2s Time] [2022-11-19 07:24:29,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2022-11-19 07:24:29,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1697. [2022-11-19 07:24:29,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1691 states have (on average 3.726788882318155) internal successors, (6302), 1696 states have internal predecessors, (6302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:29,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 6302 transitions. [2022-11-19 07:24:29,412 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 6302 transitions. Word has length 11 [2022-11-19 07:24:29,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:29,412 INFO L495 AbstractCegarLoop]: Abstraction has 1697 states and 6302 transitions. [2022-11-19 07:24:29,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:29,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 6302 transitions. [2022-11-19 07:24:29,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 07:24:29,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:29,413 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:24:29,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (80)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:29,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:29,614 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:24:29,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:29,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1640357681, now seen corresponding path program 1 times [2022-11-19 07:24:29,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:24:29,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310165393] [2022-11-19 07:24:29,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:24:29,615 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:29,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:24:29,616 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:24:29,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-19 07:24:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:24:29,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:24:29,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:30,184 INFO L321 Elim1Store]: treesize reduction 168, result has 21.1 percent of original size [2022-11-19 07:24:30,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 67 [2022-11-19 07:24:30,307 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 07:24:30,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-19 07:24:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:24:30,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:24:30,493 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:24:30,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310165393] [2022-11-19 07:24:30,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310165393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:24:30,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:24:30,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:24:30,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720879953] [2022-11-19 07:24:30,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:24:30,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:24:30,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:24:30,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:24:30,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:30,495 INFO L87 Difference]: Start difference. First operand 1697 states and 6302 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:30,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:24:30,717 INFO L93 Difference]: Finished difference Result 1653 states and 6170 transitions. [2022-11-19 07:24:30,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:24:30,718 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-19 07:24:30,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:24:30,722 INFO L225 Difference]: With dead ends: 1653 [2022-11-19 07:24:30,722 INFO L226 Difference]: Without dead ends: 1653 [2022-11-19 07:24:30,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:24:30,723 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:24:30,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 6 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:24:30,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2022-11-19 07:24:30,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1622. [2022-11-19 07:24:30,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 1618 states have (on average 3.7527812113720644) internal successors, (6072), 1621 states have internal predecessors, (6072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:30,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 6072 transitions. [2022-11-19 07:24:30,753 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 6072 transitions. Word has length 11 [2022-11-19 07:24:30,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:24:30,754 INFO L495 AbstractCegarLoop]: Abstraction has 1622 states and 6072 transitions. [2022-11-19 07:24:30,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:24:30,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 6072 transitions. [2022-11-19 07:24:30,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 07:24:30,755 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:24:30,755 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-19 07:24:30,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Forceful destruction successful, exit code 0 [2022-11-19 07:24:30,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:30,955 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:24:30,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:24:30,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1707744336, now seen corresponding path program 3 times [2022-11-19 07:24:30,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:24:30,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1092687310] [2022-11-19 07:24:30,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:24:30,956 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:24:30,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:24:30,957 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:24:30,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-19 07:24:31,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:24:31,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:24:31,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:24:31,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:31,697 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:24:31,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:24:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:32,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:24:37,667 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:37,667 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:24:37,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1092687310] [2022-11-19 07:24:37,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1092687310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:24:37,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1514883889] [2022-11-19 07:24:37,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:24:37,667 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:24:37,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:24:37,668 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:24:37,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (83)] Waiting until timeout for monitored process [2022-11-19 07:24:39,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:24:39,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:24:39,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:24:39,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:39,352 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:24:39,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:24:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:39,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:24:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:45,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1514883889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:24:45,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18011969] [2022-11-19 07:24:45,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:24:45,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:24:45,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:24:45,122 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:24:45,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-11-19 07:24:48,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:24:48,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:24:48,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:24:48,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:24:48,412 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:24:48,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:24:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:48,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:24:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:24:49,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18011969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:24:49,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:24:49,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 32 [2022-11-19 07:24:49,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402292981] [2022-11-19 07:24:49,169 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:24:49,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-19 07:24:49,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:24:49,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-19 07:24:49,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 07:24:49,171 INFO L87 Difference]: Start difference. First operand 1622 states and 6072 transitions. Second operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:25:03,769 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 [] [2022-11-19 07:25:05,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:25:07,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:25:09,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:25:11,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:25:13,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:25:15,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:25:17,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:25:19,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:25:21,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:25:23,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:25:25,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:25:27,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:25:29,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:25:31,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:25:33,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:25:35,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:25:57,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:25:57,212 INFO L93 Difference]: Finished difference Result 11876 states and 46652 transitions. [2022-11-19 07:25:57,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 07:25:57,214 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 07:25:57,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:25:57,247 INFO L225 Difference]: With dead ends: 11876 [2022-11-19 07:25:57,247 INFO L226 Difference]: Without dead ends: 11876 [2022-11-19 07:25:57,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=618, Invalid=1274, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 07:25:57,248 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 3480 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 3986 mSolverCounterSat, 421 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3480 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 4424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 3986 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:25:57,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3480 Valid, 811 Invalid, 4424 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [421 Valid, 3986 Invalid, 17 Unknown, 0 Unchecked, 48.3s Time] [2022-11-19 07:25:57,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11876 states. [2022-11-19 07:25:57,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11876 to 1638. [2022-11-19 07:25:57,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1634 states have (on average 3.7356181150550793) internal successors, (6104), 1637 states have internal predecessors, (6104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:25:57,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 6104 transitions. [2022-11-19 07:25:57,348 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 6104 transitions. Word has length 12 [2022-11-19 07:25:57,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:25:57,348 INFO L495 AbstractCegarLoop]: Abstraction has 1638 states and 6104 transitions. [2022-11-19 07:25:57,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:25:57,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 6104 transitions. [2022-11-19 07:25:57,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 07:25:57,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:25:57,350 INFO L195 NwaCegarLoop]: trace histogram [12, 1, 1, 1] [2022-11-19 07:25:57,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (83)] Forceful destruction successful, exit code 0 [2022-11-19 07:25:57,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-11-19 07:25:57,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-11-19 07:25:57,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:57,958 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:25:57,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:25:57,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1895304387, now seen corresponding path program 1 times [2022-11-19 07:25:57,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:25:57,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616937106] [2022-11-19 07:25:57,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:25:57,959 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:25:57,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:25:57,960 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:25:57,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-19 07:25:58,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:25:58,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:25:58,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:25:58,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-19 07:25:59,292 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:25:59,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:26:05,527 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:26:05,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616937106] [2022-11-19 07:26:05,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616937106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:05,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1400451549] [2022-11-19 07:26:05,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:05,527 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:26:05,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:26:05,528 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:26:05,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (86)] Waiting until timeout for monitored process [2022-11-19 07:26:06,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:06,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:26:06,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:06,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-19 07:26:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:26:07,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:26:08,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1400451549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:08,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33632353] [2022-11-19 07:26:08,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:26:08,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:26:08,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:26:08,739 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:26:08,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-11-19 07:26:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:26:09,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:26:09,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:26:09,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-11-19 07:26:09,399 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:26:09,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:26:10,223 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:26:10,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33632353] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:26:10,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:26:10,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 35 [2022-11-19 07:26:10,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757206216] [2022-11-19 07:26:10,224 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:26:10,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-19 07:26:10,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:26:10,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-19 07:26:10,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=903, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 07:26:10,225 INFO L87 Difference]: Start difference. First operand 1638 states and 6104 transitions. Second operand has 36 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:26:25,764 WARN L233 SmtUtils]: Spent 7.10s on a formula simplification that was a NOOP. DAG size: 146 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:26:28,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:30,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:32,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:34,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:36,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:38,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:40,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:42,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:44,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:47,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:49,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:51,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:26:57,785 WARN L233 SmtUtils]: Spent 5.95s on a formula simplification that was a NOOP. DAG size: 136 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:27:04,638 WARN L233 SmtUtils]: Spent 5.12s on a formula simplification that was a NOOP. DAG size: 125 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:27:19,156 WARN L233 SmtUtils]: Spent 13.73s on a formula simplification. DAG size of input: 146 DAG size of output: 146 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:27:34,075 WARN L233 SmtUtils]: Spent 8.98s on a formula simplification. DAG size of input: 138 DAG size of output: 138 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:27:46,391 WARN L233 SmtUtils]: Spent 7.80s on a formula simplification. DAG size of input: 127 DAG size of output: 127 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:27:57,346 WARN L233 SmtUtils]: Spent 6.86s on a formula simplification. DAG size of input: 116 DAG size of output: 116 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:28:44,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:44,815 INFO L93 Difference]: Finished difference Result 23916 states and 94444 transitions. [2022-11-19 07:28:44,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-19 07:28:44,817 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-19 07:28:44,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:44,917 INFO L225 Difference]: With dead ends: 23916 [2022-11-19 07:28:44,917 INFO L226 Difference]: Without dead ends: 23916 [2022-11-19 07:28:44,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 105.0s TimeCoverageRelationStatistics Valid=1276, Invalid=2264, Unknown=0, NotChecked=0, Total=3540 [2022-11-19 07:28:44,918 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 5835 mSDsluCounter, 1422 mSDsCounter, 0 mSdLazyCounter, 7348 mSolverCounterSat, 300 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5835 SdHoareTripleChecker+Valid, 1499 SdHoareTripleChecker+Invalid, 7660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 7348 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:44,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5835 Valid, 1499 Invalid, 7660 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [300 Valid, 7348 Invalid, 12 Unknown, 0 Unchecked, 56.6s Time] [2022-11-19 07:28:44,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23916 states. [2022-11-19 07:28:45,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23916 to 1666. [2022-11-19 07:28:45,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1662 states have (on average 3.7063778580024067) internal successors, (6160), 1665 states have internal predecessors, (6160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:28:45,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 6160 transitions. [2022-11-19 07:28:45,170 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 6160 transitions. Word has length 15 [2022-11-19 07:28:45,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:45,170 INFO L495 AbstractCegarLoop]: Abstraction has 1666 states and 6160 transitions. [2022-11-19 07:28:45,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:28:45,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 6160 transitions. [2022-11-19 07:28:45,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 07:28:45,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:45,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:28:45,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-11-19 07:28:45,412 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (86)] Ended with exit code 0 [2022-11-19 07:28:45,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Forceful destruction successful, exit code 0 [2022-11-19 07:28:45,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:28:45,785 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:28:45,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:45,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1745109654, now seen corresponding path program 1 times [2022-11-19 07:28:45,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:28:45,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [857984104] [2022-11-19 07:28:45,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:28:45,786 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:28:45,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:28:45,787 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:28:45,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-19 07:28:46,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:28:46,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:28:46,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:28:46,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:28:46,171 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:28:46,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [857984104] [2022-11-19 07:28:46,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [857984104] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:28:46,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:28:46,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:28:46,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529254284] [2022-11-19 07:28:46,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:28:46,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:28:46,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:28:46,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:28:46,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:28:46,175 INFO L87 Difference]: Start difference. First operand 1666 states and 6160 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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) [2022-11-19 07:28:46,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:28:46,410 INFO L93 Difference]: Finished difference Result 1546 states and 5704 transitions. [2022-11-19 07:28:46,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:28:46,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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 [2022-11-19 07:28:46,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:28:46,415 INFO L225 Difference]: With dead ends: 1546 [2022-11-19 07:28:46,415 INFO L226 Difference]: Without dead ends: 1546 [2022-11-19 07:28:46,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:28:46,416 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:28:46,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 6 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:28:46,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2022-11-19 07:28:46,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1546. [2022-11-19 07:28:46,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1543 states have (on average 3.696694750486066) internal successors, (5704), 1545 states have internal predecessors, (5704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:28:46,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 5704 transitions. [2022-11-19 07:28:46,445 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 5704 transitions. Word has length 15 [2022-11-19 07:28:46,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:28:46,445 INFO L495 AbstractCegarLoop]: Abstraction has 1546 states and 5704 transitions. [2022-11-19 07:28:46,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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) [2022-11-19 07:28:46,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 5704 transitions. [2022-11-19 07:28:46,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 07:28:46,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:28:46,448 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1] [2022-11-19 07:28:46,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Ended with exit code 0 [2022-11-19 07:28:46,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:28:46,649 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:28:46,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:28:46,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1078221584, now seen corresponding path program 4 times [2022-11-19 07:28:46,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:28:46,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1902174387] [2022-11-19 07:28:46,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:28:46,650 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:28:46,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:28:46,651 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 07:28:46,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-19 07:28:47,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:28:47,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:28:47,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-19 07:28:47,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:28:47,489 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:28:47,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:28:49,943 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:28:49,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:08,191 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:08,191 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:29:08,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1902174387] [2022-11-19 07:29:08,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1902174387] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:08,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2119173460] [2022-11-19 07:29:08,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:29:08,192 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:29:08,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:29:08,193 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:29:08,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (90)] Waiting until timeout for monitored process [2022-11-19 07:29:09,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:29:09,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:29:09,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-19 07:29:09,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:09,688 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:29:09,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:29:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:13,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:16,131 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:16,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2119173460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:16,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440409428] [2022-11-19 07:29:16,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:29:16,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:29:16,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:29:16,133 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:29:16,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c56067b8-88ff-4645-a7a1-6abb1d1bdc25/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-11-19 07:29:16,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:29:16,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:29:16,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-19 07:29:16,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:29:17,024 INFO L321 Elim1Store]: treesize reduction 138, result has 28.5 percent of original size [2022-11-19 07:29:17,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 62 [2022-11-19 07:29:17,775 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:17,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:29:19,575 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:29:19,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440409428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:29:19,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:29:19,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23, 23, 23, 23] total 62 [2022-11-19 07:29:19,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821376978] [2022-11-19 07:29:19,576 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:29:19,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-19 07:29:19,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:29:19,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-19 07:29:19,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1053, Invalid=2979, Unknown=0, NotChecked=0, Total=4032 [2022-11-19 07:29:19,578 INFO L87 Difference]: Start difference. First operand 1546 states and 5704 transitions. Second operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 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) [2022-11-19 07:30:24,032 WARN L233 SmtUtils]: Spent 27.70s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:30:52,808 WARN L233 SmtUtils]: Spent 24.50s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:30:54,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:30:56,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:30:58,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:00,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:02,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:04,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:06,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:08,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:10,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:12,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:14,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:16,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:18,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:20,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:22,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:25,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:27,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:29,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:31,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:33,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:35,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:31:37,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 07:32:09,030 WARN L233 SmtUtils]: Spent 27.44s on a formula simplification that was a NOOP. DAG size: 232 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:32:34,000 WARN L233 SmtUtils]: Spent 17.82s on a formula simplification that was a NOOP. DAG size: 222 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:32:54,426 WARN L233 SmtUtils]: Spent 15.61s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:33:11,672 WARN L233 SmtUtils]: Spent 13.22s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)