./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c328ca6a6071aea6db12d1e311bd2e5e22fce6c700c884e61df52925e139f834 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 01:54:27,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:54:27,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:54:27,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:54:27,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:54:27,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:54:27,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:54:27,406 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:54:27,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:54:27,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:54:27,413 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:54:27,416 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:54:27,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:54:27,424 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:54:27,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:54:27,430 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:54:27,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:54:27,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:54:27,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:54:27,439 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:54:27,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:54:27,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:54:27,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:54:27,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:54:27,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:54:27,455 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:54:27,456 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:54:27,457 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:54:27,458 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:54:27,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:54:27,461 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:54:27,462 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:54:27,463 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:54:27,465 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:54:27,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:54:27,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:54:27,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:54:27,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:54:27,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:54:27,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:54:27,471 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:54:27,472 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 01:54:27,513 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:54:27,513 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:54:27,514 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:54:27,514 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:54:27,515 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:54:27,515 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:54:27,516 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:54:27,516 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:54:27,516 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:54:27,516 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:54:27,517 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:54:27,518 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:54:27,518 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:54:27,518 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:54:27,518 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:54:27,519 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:54:27,519 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:54:27,519 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:54:27,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 01:54:27,521 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 01:54:27,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:54:27,521 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:54:27,521 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 01:54:27,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:54:27,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:54:27,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:54:27,523 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 01:54:27,523 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 01:54:27,523 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 01:54:27,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:54:27,524 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 01:54:27,524 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:54:27,524 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:54:27,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:54:27,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:54:27,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:54:27,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:54:27,526 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:54:27,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:54:27,526 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:54:27,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:54:27,527 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:54:27,527 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_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c328ca6a6071aea6db12d1e311bd2e5e22fce6c700c884e61df52925e139f834 [2022-11-22 01:54:27,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:54:27,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:54:27,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:54:27,893 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:54:27,893 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:54:27,894 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c [2022-11-22 01:54:30,968 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:54:31,271 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:54:31,272 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c [2022-11-22 01:54:31,283 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/data/076fcb21b/cb71cfa3c3844205b32358cc9db3c3de/FLAG796292f11 [2022-11-22 01:54:31,565 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/data/076fcb21b/cb71cfa3c3844205b32358cc9db3c3de [2022-11-22 01:54:31,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:54:31,570 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:54:31,571 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:54:31,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:54:31,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:54:31,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:54:31" (1/1) ... [2022-11-22 01:54:31,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@646c5a9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:31, skipping insertion in model container [2022-11-22 01:54:31,581 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:54:31" (1/1) ... [2022-11-22 01:54:31,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:54:31,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:54:31,864 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c[2835,2848] [2022-11-22 01:54:31,879 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:54:31,900 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-22 01:54:31,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6657ad69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:31, skipping insertion in model container [2022-11-22 01:54:31,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:54:31,902 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-22 01:54:31,903 INFO L158 Benchmark]: Toolchain (without parser) took 333.25ms. Allocated memory is still 159.4MB. Free memory was 125.7MB in the beginning and 115.6MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-22 01:54:31,904 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 159.4MB. Free memory is still 102.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 01:54:31,904 INFO L158 Benchmark]: CACSL2BoogieTranslator took 330.81ms. Allocated memory is still 159.4MB. Free memory was 125.7MB in the beginning and 115.6MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-22 01:54:31,905 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 159.4MB. Free memory is still 102.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 330.81ms. Allocated memory is still 159.4MB. Free memory was 125.7MB in the beginning and 115.6MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 115]: 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_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c328ca6a6071aea6db12d1e311bd2e5e22fce6c700c884e61df52925e139f834 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 01:54:34,232 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:54:34,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:54:34,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:54:34,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:54:34,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:54:34,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:54:34,274 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:54:34,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:54:34,277 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:54:34,277 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:54:34,279 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:54:34,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:54:34,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:54:34,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:54:34,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:54:34,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:54:34,293 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:54:34,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:54:34,301 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:54:34,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:54:34,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:54:34,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:54:34,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:54:34,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:54:34,314 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:54:34,314 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:54:34,315 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:54:34,315 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:54:34,316 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:54:34,316 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:54:34,317 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:54:34,318 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:54:34,319 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:54:34,331 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:54:34,331 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:54:34,332 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:54:34,332 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:54:34,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:54:34,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:54:34,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:54:34,337 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-22 01:54:34,378 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:54:34,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:54:34,383 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:54:34,383 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:54:34,384 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:54:34,384 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:54:34,385 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:54:34,385 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:54:34,385 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:54:34,385 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:54:34,386 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:54:34,387 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:54:34,387 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 01:54:34,388 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 01:54:34,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:54:34,388 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:54:34,388 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 01:54:34,389 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:54:34,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:54:34,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:54:34,389 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 01:54:34,390 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 01:54:34,390 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 01:54:34,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:54:34,390 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 01:54:34,391 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-22 01:54:34,391 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-22 01:54:34,391 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:54:34,391 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:54:34,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:54:34,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-22 01:54:34,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:54:34,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:54:34,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:54:34,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:54:34,393 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-22 01:54:34,393 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-22 01:54:34,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:54:34,394 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-22 01:54:34,394 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_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c328ca6a6071aea6db12d1e311bd2e5e22fce6c700c884e61df52925e139f834 [2022-11-22 01:54:34,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:54:34,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:54:34,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:54:34,730 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:54:34,731 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:54:34,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c [2022-11-22 01:54:37,864 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:54:38,058 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:54:38,059 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c [2022-11-22 01:54:38,066 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/data/944e0a1dc/92076e2beb344ae28ad4d878f8c714b6/FLAGf9615b3be [2022-11-22 01:54:38,087 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/data/944e0a1dc/92076e2beb344ae28ad4d878f8c714b6 [2022-11-22 01:54:38,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:54:38,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:54:38,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:54:38,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:54:38,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:54:38,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:54:38" (1/1) ... [2022-11-22 01:54:38,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e3370b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:38, skipping insertion in model container [2022-11-22 01:54:38,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:54:38" (1/1) ... [2022-11-22 01:54:38,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:54:38,128 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:54:38,376 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c[2835,2848] [2022-11-22 01:54:38,404 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:54:38,424 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-22 01:54:38,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:54:38,470 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c[2835,2848] [2022-11-22 01:54:38,479 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:54:38,492 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:54:38,536 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/sv-benchmarks/c/weaver/popl20-more-array-sum.wvr.c[2835,2848] [2022-11-22 01:54:38,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:54:38,572 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:54:38,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:38 WrapperNode [2022-11-22 01:54:38,573 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:54:38,574 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:54:38,574 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:54:38,574 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:54:38,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:38" (1/1) ... [2022-11-22 01:54:38,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:38" (1/1) ... [2022-11-22 01:54:38,665 INFO L138 Inliner]: procedures = 27, calls = 58, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 270 [2022-11-22 01:54:38,667 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:54:38,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:54:38,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:54:38,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:54:38,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:38" (1/1) ... [2022-11-22 01:54:38,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:38" (1/1) ... [2022-11-22 01:54:38,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:38" (1/1) ... [2022-11-22 01:54:38,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:38" (1/1) ... [2022-11-22 01:54:38,707 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:38" (1/1) ... [2022-11-22 01:54:38,716 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:38" (1/1) ... [2022-11-22 01:54:38,723 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:38" (1/1) ... [2022-11-22 01:54:38,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:38" (1/1) ... [2022-11-22 01:54:38,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:54:38,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:54:38,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:54:38,739 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:54:38,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:38" (1/1) ... [2022-11-22 01:54:38,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:54:38,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:54:38,774 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:54:38,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:54:38,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:54:38,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-22 01:54:38,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:54:38,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-22 01:54:38,824 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-22 01:54:38,824 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-22 01:54:38,825 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-22 01:54:38,825 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-22 01:54:38,825 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-22 01:54:38,825 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-22 01:54:38,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-22 01:54:38,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-22 01:54:38,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 01:54:38,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:54:38,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:54:38,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:54:38,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-22 01:54:38,828 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-22 01:54:38,955 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:54:38,957 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:54:39,841 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:54:40,252 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:54:40,253 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-22 01:54:40,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:54:40 BoogieIcfgContainer [2022-11-22 01:54:40,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:54:40,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:54:40,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:54:40,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:54:40,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:54:38" (1/3) ... [2022-11-22 01:54:40,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@137a3913 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:54:40, skipping insertion in model container [2022-11-22 01:54:40,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:54:38" (2/3) ... [2022-11-22 01:54:40,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@137a3913 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:54:40, skipping insertion in model container [2022-11-22 01:54:40,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:54:40" (3/3) ... [2022-11-22 01:54:40,270 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum.wvr.c [2022-11-22 01:54:40,294 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:54:40,294 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-11-22 01:54:40,294 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-22 01:54:40,436 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-22 01:54:40,477 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-22 01:54:40,493 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 218 places, 224 transitions, 472 flow [2022-11-22 01:54:40,495 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 218 places, 224 transitions, 472 flow [2022-11-22 01:54:40,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 218 places, 224 transitions, 472 flow [2022-11-22 01:54:40,591 INFO L130 PetriNetUnfolder]: 16/221 cut-off events. [2022-11-22 01:54:40,591 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-22 01:54:40,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 221 events. 16/221 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 238 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 169. Up to 2 conditions per place. [2022-11-22 01:54:40,601 INFO L119 LiptonReduction]: Number of co-enabled transitions 2970 [2022-11-22 01:55:23,662 INFO L134 LiptonReduction]: Checked pairs total: 4649 [2022-11-22 01:55:23,662 INFO L136 LiptonReduction]: Total number of compositions: 228 [2022-11-22 01:55:23,670 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 66 places, 61 transitions, 146 flow [2022-11-22 01:55:23,846 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2345 states, 1843 states have (on average 4.500813890396094) internal successors, (8295), 2344 states have internal predecessors, (8295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:23,863 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:55:23,870 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;@3f3762ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:55:23,870 INFO L358 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2022-11-22 01:55:23,880 INFO L276 IsEmpty]: Start isEmpty. Operand has 2345 states, 1843 states have (on average 4.500813890396094) internal successors, (8295), 2344 states have internal predecessors, (8295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:23,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:55:23,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:55:23,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:55:23,887 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:55:23,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:55:23,892 INFO L85 PathProgramCache]: Analyzing trace with hash 38976, now seen corresponding path program 1 times [2022-11-22 01:55:23,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:55:23,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820380757] [2022-11-22 01:55:23,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:23,909 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:55:23,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:55:23,919 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:55:23,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-22 01:55:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:24,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:55:24,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:24,324 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:55:24,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:55:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:55:24,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:55:24,363 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:55:24,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820380757] [2022-11-22 01:55:24,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820380757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:55:24,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:55:24,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:55:24,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985519021] [2022-11-22 01:55:24,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:55:24,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:55:24,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:55:24,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:55:24,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:55:24,417 INFO L87 Difference]: Start difference. First operand has 2345 states, 1843 states have (on average 4.500813890396094) internal successors, (8295), 2344 states have internal predecessors, (8295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:24,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:55:24,875 INFO L93 Difference]: Finished difference Result 2342 states and 8292 transitions. [2022-11-22 01:55:24,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:55:24,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-22 01:55:24,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:55:24,939 INFO L225 Difference]: With dead ends: 2342 [2022-11-22 01:55:24,940 INFO L226 Difference]: Without dead ends: 2342 [2022-11-22 01:55:24,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:55:24,944 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:55:24,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 3 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:55:24,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2022-11-22 01:55:25,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 2342. [2022-11-22 01:55:25,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2342 states, 1843 states have (on average 4.499186109603906) internal successors, (8292), 2341 states have internal predecessors, (8292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:25,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 8292 transitions. [2022-11-22 01:55:25,220 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 8292 transitions. Word has length 2 [2022-11-22 01:55:25,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:55:25,226 INFO L495 AbstractCegarLoop]: Abstraction has 2342 states and 8292 transitions. [2022-11-22 01:55:25,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:25,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 8292 transitions. [2022-11-22 01:55:25,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:55:25,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:55:25,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:55:25,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:55:25,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:55:25,428 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:55:25,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:55:25,429 INFO L85 PathProgramCache]: Analyzing trace with hash 38977, now seen corresponding path program 1 times [2022-11-22 01:55:25,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:55:25,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [613433027] [2022-11-22 01:55:25,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:25,430 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:55:25,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:55:25,448 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:55:25,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-22 01:55:25,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:25,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:55:25,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:25,756 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:55:25,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:55:25,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:55:25,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:55:25,812 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:55:25,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [613433027] [2022-11-22 01:55:25,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [613433027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:55:25,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:55:25,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:55:25,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969155745] [2022-11-22 01:55:25,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:55:25,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:55:25,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:55:25,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:55:25,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:55:25,815 INFO L87 Difference]: Start difference. First operand 2342 states and 8292 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:26,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:55:26,599 INFO L93 Difference]: Finished difference Result 4681 states and 16581 transitions. [2022-11-22 01:55:26,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:55:26,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-22 01:55:26,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:55:26,675 INFO L225 Difference]: With dead ends: 4681 [2022-11-22 01:55:26,675 INFO L226 Difference]: Without dead ends: 4681 [2022-11-22 01:55:26,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:55:26,677 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 48 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:55:26,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 6 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:55:26,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4681 states. [2022-11-22 01:55:26,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4681 to 2344. [2022-11-22 01:55:26,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 1845 states have (on average 4.4975609756097565) internal successors, (8298), 2343 states have internal predecessors, (8298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:26,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 8298 transitions. [2022-11-22 01:55:26,956 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 8298 transitions. Word has length 2 [2022-11-22 01:55:26,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:55:26,957 INFO L495 AbstractCegarLoop]: Abstraction has 2344 states and 8298 transitions. [2022-11-22 01:55:26,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:26,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 8298 transitions. [2022-11-22 01:55:26,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 01:55:26,958 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:55:26,958 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 01:55:26,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:55:27,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:55:27,170 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:55:27,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:55:27,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1212203, now seen corresponding path program 1 times [2022-11-22 01:55:27,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:55:27,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2048807894] [2022-11-22 01:55:27,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:27,171 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:55:27,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:55:27,173 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:55:27,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-22 01:55:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:27,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:55:27,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:27,466 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:55:27,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:55:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:55:27,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:55:27,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:55:27,896 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:55:27,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2048807894] [2022-11-22 01:55:27,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2048807894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:55:27,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [209518563] [2022-11-22 01:55:27,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:27,897 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:55:27,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:55:27,901 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:55:27,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-22 01:55:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:28,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:55:28,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:28,327 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:55:28,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:55:28,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:55:28,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:55:28,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:55:28,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [209518563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:55:28,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679091111] [2022-11-22 01:55:28,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:28,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:55:28,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:55:28,501 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:55:28,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:55:28,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:28,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:55:28,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:28,791 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:55:28,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:55:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:55:28,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:55:29,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:55:29,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679091111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:55:29,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:55:29,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 6 [2022-11-22 01:55:29,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976151396] [2022-11-22 01:55:29,038 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:55:29,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 01:55:29,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:55:29,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 01:55:29,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:55:29,040 INFO L87 Difference]: Start difference. First operand 2344 states and 8298 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:32,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:55:32,570 INFO L93 Difference]: Finished difference Result 9361 states and 33165 transitions. [2022-11-22 01:55:32,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:55:32,572 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-22 01:55:32,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:55:32,681 INFO L225 Difference]: With dead ends: 9361 [2022-11-22 01:55:32,681 INFO L226 Difference]: Without dead ends: 9361 [2022-11-22 01:55:32,681 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 [2022-11-22 01:55:32,682 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 525 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:55:32,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 15 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-22 01:55:32,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9361 states. [2022-11-22 01:55:32,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9361 to 2350. [2022-11-22 01:55:33,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2350 states, 1851 states have (on average 4.492706645056726) internal successors, (8316), 2349 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:33,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 8316 transitions. [2022-11-22 01:55:33,031 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 8316 transitions. Word has length 3 [2022-11-22 01:55:33,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:55:33,031 INFO L495 AbstractCegarLoop]: Abstraction has 2350 states and 8316 transitions. [2022-11-22 01:55:33,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:33,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 8316 transitions. [2022-11-22 01:55:33,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 01:55:33,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:55:33,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 01:55:33,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:55:33,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:55:33,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:55:33,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:55:33,662 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:55:33,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:55:33,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1213413, now seen corresponding path program 1 times [2022-11-22 01:55:33,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:55:33,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897912446] [2022-11-22 01:55:33,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:33,663 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:55:33,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:55:33,665 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:55:33,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-22 01:55:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:33,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:55:33,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:55:33,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:55:33,828 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:55:33,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [897912446] [2022-11-22 01:55:33,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [897912446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:55:33,831 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:55:33,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:55:33,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348602069] [2022-11-22 01:55:33,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:55:33,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:55:33,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:55:33,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:55:33,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:55:33,834 INFO L87 Difference]: Start difference. First operand 2350 states and 8316 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:34,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:55:34,382 INFO L93 Difference]: Finished difference Result 2351 states and 8313 transitions. [2022-11-22 01:55:34,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:55:34,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-22 01:55:34,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:55:34,441 INFO L225 Difference]: With dead ends: 2351 [2022-11-22 01:55:34,441 INFO L226 Difference]: Without dead ends: 2350 [2022-11-22 01:55:34,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:55:34,443 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:55:34,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:55:34,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2022-11-22 01:55:34,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 2350. [2022-11-22 01:55:34,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2350 states, 1851 states have (on average 4.49054565099946) internal successors, (8312), 2349 states have internal predecessors, (8312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:34,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 8312 transitions. [2022-11-22 01:55:34,592 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 8312 transitions. Word has length 3 [2022-11-22 01:55:34,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:55:34,607 INFO L495 AbstractCegarLoop]: Abstraction has 2350 states and 8312 transitions. [2022-11-22 01:55:34,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:34,608 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 8312 transitions. [2022-11-22 01:55:34,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:55:34,609 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:55:34,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:55:34,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:55:34,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:55:34,820 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:55:34,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:55:34,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1165085287, now seen corresponding path program 1 times [2022-11-22 01:55:34,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:55:34,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632514199] [2022-11-22 01:55:34,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:34,821 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:55:34,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:55:34,822 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:55:34,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-22 01:55:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:34,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:55:34,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:34,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:55:35,082 INFO L321 Elim1Store]: treesize reduction 86, result has 25.9 percent of original size [2022-11-22 01:55:35,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 55 [2022-11-22 01:55:35,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:55:35,545 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 01:55:35,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 32 [2022-11-22 01:55:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:55:35,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:55:35,711 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:55:35,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632514199] [2022-11-22 01:55:35,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632514199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:55:35,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:55:35,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:55:35,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116639250] [2022-11-22 01:55:35,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:55:35,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:55:35,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:55:35,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:55:35,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:55:35,713 INFO L87 Difference]: Start difference. First operand 2350 states and 8312 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:36,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:55:36,561 INFO L93 Difference]: Finished difference Result 1901 states and 6516 transitions. [2022-11-22 01:55:36,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:55:36,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-22 01:55:36,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:55:36,572 INFO L225 Difference]: With dead ends: 1901 [2022-11-22 01:55:36,572 INFO L226 Difference]: Without dead ends: 1901 [2022-11-22 01:55:36,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:55:36,573 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 98 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:55:36,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 3 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:55:36,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2022-11-22 01:55:36,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 1901. [2022-11-22 01:55:36,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1901 states, 1528 states have (on average 4.2643979057591626) internal successors, (6516), 1900 states have internal predecessors, (6516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:36,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1901 states to 1901 states and 6516 transitions. [2022-11-22 01:55:36,636 INFO L78 Accepts]: Start accepts. Automaton has 1901 states and 6516 transitions. Word has length 5 [2022-11-22 01:55:36,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:55:36,636 INFO L495 AbstractCegarLoop]: Abstraction has 1901 states and 6516 transitions. [2022-11-22 01:55:36,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:36,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1901 states and 6516 transitions. [2022-11-22 01:55:36,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:55:36,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:55:36,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:55:36,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:55:36,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:55:36,850 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:55:36,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:55:36,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1165085288, now seen corresponding path program 1 times [2022-11-22 01:55:36,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:55:36,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1456242934] [2022-11-22 01:55:36,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:36,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:55:36,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:55:36,852 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:55:36,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-22 01:55:37,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:37,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 01:55:37,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:37,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:55:37,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:55:37,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:55:37,163 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-22 01:55:37,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 34 [2022-11-22 01:55:37,211 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-22 01:55:37,211 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 44 treesize of output 45 [2022-11-22 01:55:37,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:55:37,514 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2022-11-22 01:55:37,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2022-11-22 01:55:37,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:55:37,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:55:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:55:38,023 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:55:38,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1456242934] [2022-11-22 01:55:38,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1456242934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:55:38,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1775340245] [2022-11-22 01:55:38,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:38,024 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:55:38,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:55:38,027 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:55:38,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-22 01:55:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:38,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 01:55:38,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:38,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:55:38,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:55:38,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:55:38,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:55:38,438 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-22 01:55:38,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-11-22 01:55:38,473 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-22 01:55:38,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-22 01:55:38,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:55:38,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-22 01:55:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:55:38,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:55:38,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1775340245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:55:38,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:55:38,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 3] total 8 [2022-11-22 01:55:38,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873899154] [2022-11-22 01:55:38,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:55:38,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:55:38,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:55:38,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:55:38,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:55:38,725 INFO L87 Difference]: Start difference. First operand 1901 states and 6516 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:39,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:55:39,119 INFO L93 Difference]: Finished difference Result 1452 states and 4720 transitions. [2022-11-22 01:55:39,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:55:39,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-22 01:55:39,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:55:39,127 INFO L225 Difference]: With dead ends: 1452 [2022-11-22 01:55:39,128 INFO L226 Difference]: Without dead ends: 1452 [2022-11-22 01:55:39,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:55:39,129 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 94 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:55:39,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 3 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:55:39,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1452 states. [2022-11-22 01:55:39,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1452 to 1452. [2022-11-22 01:55:39,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1205 states have (on average 3.91701244813278) internal successors, (4720), 1451 states have internal predecessors, (4720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:39,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 4720 transitions. [2022-11-22 01:55:39,186 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 4720 transitions. Word has length 5 [2022-11-22 01:55:39,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:55:39,186 INFO L495 AbstractCegarLoop]: Abstraction has 1452 states and 4720 transitions. [2022-11-22 01:55:39,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:39,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 4720 transitions. [2022-11-22 01:55:39,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 01:55:39,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:55:39,187 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-22 01:55:39,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-22 01:55:39,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2022-11-22 01:55:39,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:55:39,610 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:55:39,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:55:39,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1756889793, now seen corresponding path program 2 times [2022-11-22 01:55:39,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:55:39,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1517014729] [2022-11-22 01:55:39,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:55:39,611 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:55:39,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:55:39,612 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:55:39,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-22 01:55:39,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:55:39,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:55:39,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 01:55:39,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:39,870 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:55:39,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:55:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:55:40,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:55:40,793 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:55:40,794 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:55:40,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1517014729] [2022-11-22 01:55:40,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1517014729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:55:40,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1351712210] [2022-11-22 01:55:40,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:55:40,794 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:55:40,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:55:40,795 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:55:40,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-22 01:55:41,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:55:41,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:55:41,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:55:41,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:41,196 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:55:41,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:55:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:55:41,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:55:42,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:55:42,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1351712210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:55:42,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884914233] [2022-11-22 01:55:42,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:55:42,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:55:42,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:55:42,257 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:55:42,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 01:55:42,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:55:42,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:55:42,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:55:42,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:42,531 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:55:42,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:55:42,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:55:42,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:55:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:55:42,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884914233] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:55:42,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:55:42,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 15 [2022-11-22 01:55:42,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460135019] [2022-11-22 01:55:42,812 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:55:42,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 01:55:42,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:55:42,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 01:55:42,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-22 01:55:42,813 INFO L87 Difference]: Start difference. First operand 1452 states and 4720 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) [2022-11-22 01:55:47,079 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 [] [2022-11-22 01:55:48,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:55:50,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:55:53,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:55:55,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:55:58,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:56:00,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:56:03,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:56:05,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:56:08,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:56:15,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:56:15,774 INFO L93 Difference]: Finished difference Result 11537 states and 37635 transitions. [2022-11-22 01:56:15,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-22 01:56:15,775 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 [2022-11-22 01:56:15,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:56:15,838 INFO L225 Difference]: With dead ends: 11537 [2022-11-22 01:56:15,838 INFO L226 Difference]: Without dead ends: 11537 [2022-11-22 01:56:15,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2022-11-22 01:56:15,839 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1365 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 74 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1365 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:56:15,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1365 Valid, 84 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1258 Invalid, 8 Unknown, 0 Unchecked, 30.5s Time] [2022-11-22 01:56:15,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11537 states. [2022-11-22 01:56:16,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11537 to 1460. [2022-11-22 01:56:16,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1213 states have (on average 3.9043693322341304) internal successors, (4736), 1459 states have internal predecessors, (4736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:56:16,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 4736 transitions. [2022-11-22 01:56:16,023 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 4736 transitions. Word has length 6 [2022-11-22 01:56:16,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:56:16,023 INFO L495 AbstractCegarLoop]: Abstraction has 1460 states and 4736 transitions. [2022-11-22 01:56:16,023 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) [2022-11-22 01:56:16,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 4736 transitions. [2022-11-22 01:56:16,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:56:16,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:56:16,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:56:16,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-22 01:56:16,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 01:56:16,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-22 01:56:16,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:56:16,643 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:56:16,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:56:16,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1339473600, now seen corresponding path program 1 times [2022-11-22 01:56:16,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:56:16,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983539996] [2022-11-22 01:56:16,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:56:16,644 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:56:16,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:56:16,645 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:56:16,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-22 01:56:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:56:16,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 01:56:16,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:56:16,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:16,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:16,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:16,970 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2022-11-22 01:56:16,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 34 [2022-11-22 01:56:16,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-22 01:56:17,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:17,234 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2022-11-22 01:56:17,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2022-11-22 01:56:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:56:17,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:56:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:56:17,850 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:56:17,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983539996] [2022-11-22 01:56:17,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983539996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:56:17,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [103894444] [2022-11-22 01:56:17,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:56:17,851 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:56:17,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:56:17,855 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:56:17,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-22 01:56:18,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:56:18,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:56:18,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:56:18,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:18,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:18,264 INFO L321 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-11-22 01:56:18,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-11-22 01:56:18,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-22 01:56:18,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:18,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-22 01:56:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:56:18,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:56:18,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [103894444] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:56:18,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:56:18,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 3] total 8 [2022-11-22 01:56:18,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785676794] [2022-11-22 01:56:18,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:56:18,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:56:18,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:56:18,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:56:18,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:56:18,516 INFO L87 Difference]: Start difference. First operand 1460 states and 4736 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:56:18,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:56:18,846 INFO L93 Difference]: Finished difference Result 1389 states and 4530 transitions. [2022-11-22 01:56:18,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:56:18,847 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 01:56:18,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:56:18,852 INFO L225 Difference]: With dead ends: 1389 [2022-11-22 01:56:18,852 INFO L226 Difference]: Without dead ends: 1389 [2022-11-22 01:56:18,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:56:18,853 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 46 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:56:18,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 3 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:56:18,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2022-11-22 01:56:18,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 1389. [2022-11-22 01:56:18,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 1172 states have (on average 3.86518771331058) internal successors, (4530), 1388 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:56:18,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 4530 transitions. [2022-11-22 01:56:18,891 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 4530 transitions. Word has length 7 [2022-11-22 01:56:18,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:56:18,892 INFO L495 AbstractCegarLoop]: Abstraction has 1389 states and 4530 transitions. [2022-11-22 01:56:18,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:56:18,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 4530 transitions. [2022-11-22 01:56:18,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:56:18,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:56:18,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:56:18,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-11-22 01:56:19,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2022-11-22 01:56:19,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:56:19,305 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:56:19,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:56:19,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1339473599, now seen corresponding path program 1 times [2022-11-22 01:56:19,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:56:19,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645834197] [2022-11-22 01:56:19,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:56:19,306 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:56:19,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:56:19,308 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:56:19,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-22 01:56:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:56:19,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 01:56:19,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:56:19,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:19,579 INFO L321 Elim1Store]: treesize reduction 79, result has 27.5 percent of original size [2022-11-22 01:56:19,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 48 [2022-11-22 01:56:19,964 INFO L321 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2022-11-22 01:56:19,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 32 [2022-11-22 01:56:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:56:20,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:56:20,135 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:56:20,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645834197] [2022-11-22 01:56:20,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645834197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:56:20,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:56:20,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:56:20,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880450642] [2022-11-22 01:56:20,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:56:20,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:56:20,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:56:20,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:56:20,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:56:20,138 INFO L87 Difference]: Start difference. First operand 1389 states and 4530 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:56:20,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:56:20,530 INFO L93 Difference]: Finished difference Result 1318 states and 4324 transitions. [2022-11-22 01:56:20,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:56:20,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 01:56:20,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:56:20,536 INFO L225 Difference]: With dead ends: 1318 [2022-11-22 01:56:20,537 INFO L226 Difference]: Without dead ends: 1318 [2022-11-22 01:56:20,537 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 [2022-11-22 01:56:20,538 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:56:20,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 3 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:56:20,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2022-11-22 01:56:20,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1318. [2022-11-22 01:56:20,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1318 states, 1131 states have (on average 3.8231653404067196) internal successors, (4324), 1317 states have internal predecessors, (4324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:56:20,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1318 states to 1318 states and 4324 transitions. [2022-11-22 01:56:20,578 INFO L78 Accepts]: Start accepts. Automaton has 1318 states and 4324 transitions. Word has length 7 [2022-11-22 01:56:20,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:56:20,579 INFO L495 AbstractCegarLoop]: Abstraction has 1318 states and 4324 transitions. [2022-11-22 01:56:20,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:56:20,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1318 states and 4324 transitions. [2022-11-22 01:56:20,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 01:56:20,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:56:20,580 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:56:20,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2022-11-22 01:56:20,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:56:20,794 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:56:20,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:56:20,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1425985203, now seen corresponding path program 1 times [2022-11-22 01:56:20,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:56:20,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59008652] [2022-11-22 01:56:20,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:56:20,795 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:56:20,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:56:20,796 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:56:20,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-22 01:56:20,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:56:20,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 01:56:20,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:56:21,093 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:56:21,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:56:21,163 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:56:21,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-22 01:56:21,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:56:21,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:56:21,187 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:56:21,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59008652] [2022-11-22 01:56:21,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59008652] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:56:21,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:56:21,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:56:21,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529071212] [2022-11-22 01:56:21,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:56:21,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:56:21,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:56:21,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:56:21,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:56:21,189 INFO L87 Difference]: Start difference. First operand 1318 states and 4324 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:56:21,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:56:21,479 INFO L93 Difference]: Finished difference Result 918 states and 2976 transitions. [2022-11-22 01:56:21,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:56:21,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-22 01:56:21,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:56:21,484 INFO L225 Difference]: With dead ends: 918 [2022-11-22 01:56:21,484 INFO L226 Difference]: Without dead ends: 918 [2022-11-22 01:56:21,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:56:21,485 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 75 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:56:21,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 3 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:56:21,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2022-11-22 01:56:21,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 918. [2022-11-22 01:56:21,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 812 states have (on average 3.665024630541872) internal successors, (2976), 917 states have internal predecessors, (2976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:56:21,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 2976 transitions. [2022-11-22 01:56:21,512 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 2976 transitions. Word has length 8 [2022-11-22 01:56:21,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:56:21,513 INFO L495 AbstractCegarLoop]: Abstraction has 918 states and 2976 transitions. [2022-11-22 01:56:21,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:56:21,514 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 2976 transitions. [2022-11-22 01:56:21,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 01:56:21,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:56:21,514 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:56:21,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-22 01:56:21,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:56:21,728 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:56:21,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:56:21,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1425985204, now seen corresponding path program 1 times [2022-11-22 01:56:21,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:56:21,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1883718294] [2022-11-22 01:56:21,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:56:21,730 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:56:21,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:56:21,731 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:56:21,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-22 01:56:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:56:21,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:56:21,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:56:22,092 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:56:22,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:56:22,283 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:56:22,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:56:22,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:22,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:56:22,458 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:56:22,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-22 01:56:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:56:22,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:56:25,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:56:25,249 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:56:25,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1883718294] [2022-11-22 01:56:25,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1883718294] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:56:25,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1675413482] [2022-11-22 01:56:25,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:56:25,250 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:56:25,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:56:25,251 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:56:25,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-22 01:56:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:56:25,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:56:25,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:56:25,708 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:56:25,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:56:25,866 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:56:25,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:56:26,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:26,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 01:56:26,101 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:56:26,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-22 01:56:26,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:56:26,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:56:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:56:27,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1675413482] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:56:27,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317606718] [2022-11-22 01:56:27,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:56:27,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:56:27,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:56:27,164 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:56:27,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-22 01:56:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:56:27,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:56:27,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:56:27,423 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:56:27,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:56:27,619 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-22 01:56:27,623 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 [2022-11-22 01:56:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:56:28,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:56:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:56:34,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317606718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:56:34,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:56:34,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 6, 6] total 22 [2022-11-22 01:56:34,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360659746] [2022-11-22 01:56:34,075 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:56:34,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 01:56:34,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:56:34,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 01:56:34,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=454, Unknown=2, NotChecked=0, Total=552 [2022-11-22 01:56:34,079 INFO L87 Difference]: Start difference. First operand 918 states and 2976 transitions. Second operand has 24 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:56:41,468 WARN L233 SmtUtils]: Spent 6.75s on a formula simplification. DAG size of input: 48 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:56:59,452 WARN L233 SmtUtils]: Spent 13.76s on a formula simplification. DAG size of input: 64 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:57:13,730 WARN L233 SmtUtils]: Spent 14.02s on a formula simplification. DAG size of input: 54 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:57:33,294 WARN L233 SmtUtils]: Spent 15.86s on a formula simplification. DAG size of input: 66 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:57:40,242 WARN L233 SmtUtils]: Spent 6.70s on a formula simplification. DAG size of input: 62 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:57:54,689 WARN L233 SmtUtils]: Spent 14.15s on a formula simplification. DAG size of input: 56 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:58:05,523 WARN L233 SmtUtils]: Spent 10.18s on a formula simplification. DAG size of input: 60 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:58:22,328 WARN L233 SmtUtils]: Spent 13.15s on a formula simplification. DAG size of input: 70 DAG size of output: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:58:30,150 WARN L233 SmtUtils]: Spent 7.62s on a formula simplification. DAG size of input: 64 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:58:36,427 WARN L233 SmtUtils]: Spent 5.62s on a formula simplification. DAG size of input: 54 DAG size of output: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:58:47,829 WARN L233 SmtUtils]: Spent 5.96s on a formula simplification. DAG size of input: 51 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:59:05,942 WARN L233 SmtUtils]: Spent 17.66s on a formula simplification. DAG size of input: 62 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:59:18,675 WARN L233 SmtUtils]: Spent 8.49s on a formula simplification. DAG size of input: 60 DAG size of output: 57 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:59:21,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:21,085 INFO L93 Difference]: Finished difference Result 10926 states and 36371 transitions. [2022-11-22 01:59:21,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-22 01:59:21,086 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-22 01:59:21,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:21,116 INFO L225 Difference]: With dead ends: 10926 [2022-11-22 01:59:21,117 INFO L226 Difference]: Without dead ends: 10926 [2022-11-22 01:59:21,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 168.7s TimeCoverageRelationStatistics Valid=657, Invalid=2203, Unknown=2, NotChecked=0, Total=2862 [2022-11-22 01:59:21,118 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2697 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2697 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:21,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2697 Valid, 77 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-11-22 01:59:21,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10926 states. [2022-11-22 01:59:21,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10926 to 1441. [2022-11-22 01:59:21,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1335 states have (on average 4.014232209737828) internal successors, (5359), 1440 states have internal predecessors, (5359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:21,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 5359 transitions. [2022-11-22 01:59:21,257 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 5359 transitions. Word has length 8 [2022-11-22 01:59:21,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:21,258 INFO L495 AbstractCegarLoop]: Abstraction has 1441 states and 5359 transitions. [2022-11-22 01:59:21,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:21,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 5359 transitions. [2022-11-22 01:59:21,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 01:59:21,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:21,259 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:21,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:21,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:21,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:21,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:59:21,875 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:59:21,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:21,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1425985205, now seen corresponding path program 1 times [2022-11-22 01:59:21,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:59:21,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868684539] [2022-11-22 01:59:21,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:21,877 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:59:21,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:59:21,878 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:59:21,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-22 01:59:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:22,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:59:22,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:22,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-22 01:59:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:59:22,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:59:22,056 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:59:22,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868684539] [2022-11-22 01:59:22,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868684539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:59:22,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:59:22,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:59:22,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710166142] [2022-11-22 01:59:22,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:59:22,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:59:22,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:59:22,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:59:22,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:59:22,058 INFO L87 Difference]: Start difference. First operand 1441 states and 5359 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) [2022-11-22 01:59:22,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:22,392 INFO L93 Difference]: Finished difference Result 1013 states and 3569 transitions. [2022-11-22 01:59:22,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:59:22,392 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 [2022-11-22 01:59:22,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:22,395 INFO L225 Difference]: With dead ends: 1013 [2022-11-22 01:59:22,395 INFO L226 Difference]: Without dead ends: 1013 [2022-11-22 01:59:22,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:59:22,396 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 68 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:22,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 3 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:59:22,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-11-22 01:59:22,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1013. [2022-11-22 01:59:22,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 960 states have (on average 3.7177083333333334) internal successors, (3569), 1012 states have internal predecessors, (3569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:22,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3569 transitions. [2022-11-22 01:59:22,423 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3569 transitions. Word has length 8 [2022-11-22 01:59:22,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:22,423 INFO L495 AbstractCegarLoop]: Abstraction has 1013 states and 3569 transitions. [2022-11-22 01:59:22,424 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) [2022-11-22 01:59:22,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3569 transitions. [2022-11-22 01:59:22,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 01:59:22,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:22,424 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:22,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:22,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:59:22,637 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:59:22,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:22,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1425985206, now seen corresponding path program 1 times [2022-11-22 01:59:22,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:59:22,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2036118906] [2022-11-22 01:59:22,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:22,638 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:59:22,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:59:22,638 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:59:22,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-22 01:59:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:22,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:59:22,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:22,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:22,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:23,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-22 01:59:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:23,227 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:59:23,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2036118906] [2022-11-22 01:59:23,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2036118906] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:23,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1613400291] [2022-11-22 01:59:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:23,228 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:59:23,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:59:23,229 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:59:23,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-22 01:59:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:23,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:59:23,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:23,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 01:59:23,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:23,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:24,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1613400291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:24,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994576195] [2022-11-22 01:59:24,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:24,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:24,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:24,112 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:59:24,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-22 01:59:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:24,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 01:59:24,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:24,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 01:59:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:24,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:24,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994576195] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:24,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:59:24,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 20 [2022-11-22 01:59:24,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135708426] [2022-11-22 01:59:24,949 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:59:24,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-22 01:59:24,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:59:24,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-22 01:59:24,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-11-22 01:59:24,950 INFO L87 Difference]: Start difference. First operand 1013 states and 3569 transitions. Second operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:30,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:30,704 INFO L93 Difference]: Finished difference Result 4743 states and 15666 transitions. [2022-11-22 01:59:30,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 01:59:30,705 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-22 01:59:30,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:30,718 INFO L225 Difference]: With dead ends: 4743 [2022-11-22 01:59:30,718 INFO L226 Difference]: Without dead ends: 4743 [2022-11-22 01:59:30,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=289, Invalid=971, Unknown=0, NotChecked=0, Total=1260 [2022-11-22 01:59:30,719 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 941 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:30,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [941 Valid, 51 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-11-22 01:59:30,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4743 states. [2022-11-22 01:59:30,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4743 to 1308. [2022-11-22 01:59:30,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1255 states have (on average 3.70597609561753) internal successors, (4651), 1307 states have internal predecessors, (4651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:30,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 4651 transitions. [2022-11-22 01:59:30,795 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 4651 transitions. Word has length 8 [2022-11-22 01:59:30,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:30,796 INFO L495 AbstractCegarLoop]: Abstraction has 1308 states and 4651 transitions. [2022-11-22 01:59:30,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:30,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 4651 transitions. [2022-11-22 01:59:30,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:59:30,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:30,797 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:30,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:31,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:31,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:31,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:59:31,401 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:59:31,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:31,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1256089161, now seen corresponding path program 1 times [2022-11-22 01:59:31,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:59:31,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2091571253] [2022-11-22 01:59:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:31,402 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:59:31,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:59:31,403 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:59:31,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-22 01:59:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:31,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 01:59:31,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:31,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:31,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:31,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:31,706 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-22 01:59:31,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 34 [2022-11-22 01:59:31,745 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 [2022-11-22 01:59:31,963 INFO L321 Elim1Store]: treesize reduction 32, result has 25.6 percent of original size [2022-11-22 01:59:31,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2022-11-22 01:59:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:32,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:32,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:32,731 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:59:32,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2091571253] [2022-11-22 01:59:32,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2091571253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:32,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [528707048] [2022-11-22 01:59:32,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:32,732 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:59:32,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:59:32,733 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:59:32,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-22 01:59:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:33,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:59:33,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:33,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:33,225 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-11-22 01:59:33,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-11-22 01:59:33,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:33,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-22 01:59:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:59:33,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:59:33,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [528707048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:59:33,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 01:59:33,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 3] total 8 [2022-11-22 01:59:33,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269623785] [2022-11-22 01:59:33,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:59:33,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:59:33,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:59:33,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:59:33,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:59:33,467 INFO L87 Difference]: Start difference. First operand 1308 states and 4651 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) [2022-11-22 01:59:33,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:33,754 INFO L93 Difference]: Finished difference Result 1230 states and 4399 transitions. [2022-11-22 01:59:33,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:59:33,755 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 [2022-11-22 01:59:33,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:33,758 INFO L225 Difference]: With dead ends: 1230 [2022-11-22 01:59:33,758 INFO L226 Difference]: Without dead ends: 1230 [2022-11-22 01:59:33,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:59:33,758 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:33,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 3 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:59:33,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2022-11-22 01:59:33,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1230. [2022-11-22 01:59:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1189 states have (on average 3.6997476871320436) internal successors, (4399), 1229 states have internal predecessors, (4399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:33,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 4399 transitions. [2022-11-22 01:59:33,789 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 4399 transitions. Word has length 9 [2022-11-22 01:59:33,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:33,789 INFO L495 AbstractCegarLoop]: Abstraction has 1230 states and 4399 transitions. [2022-11-22 01:59:33,790 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) [2022-11-22 01:59:33,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 4399 transitions. [2022-11-22 01:59:33,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:59:33,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:33,791 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:33,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:34,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:34,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:59:34,203 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:59:34,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:34,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1256089163, now seen corresponding path program 1 times [2022-11-22 01:59:34,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:59:34,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574146319] [2022-11-22 01:59:34,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:34,204 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:59:34,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:59:34,205 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:59:34,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-22 01:59:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:34,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:59:34,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:34,449 INFO L321 Elim1Store]: treesize reduction 105, result has 17.3 percent of original size [2022-11-22 01:59:34,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 44 [2022-11-22 01:59:34,494 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 01:59:34,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-22 01:59:34,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:59:34,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:59:34,517 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:59:34,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574146319] [2022-11-22 01:59:34,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574146319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:59:34,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:59:34,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:59:34,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776401419] [2022-11-22 01:59:34,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:59:34,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:59:34,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:59:34,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:59:34,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:59:34,519 INFO L87 Difference]: Start difference. First operand 1230 states and 4399 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) [2022-11-22 01:59:34,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:34,848 INFO L93 Difference]: Finished difference Result 1152 states and 4147 transitions. [2022-11-22 01:59:34,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:59:34,848 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 [2022-11-22 01:59:34,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:34,852 INFO L225 Difference]: With dead ends: 1152 [2022-11-22 01:59:34,852 INFO L226 Difference]: Without dead ends: 1152 [2022-11-22 01:59:34,854 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 [2022-11-22 01:59:34,855 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:34,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 3 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:59:34,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2022-11-22 01:59:34,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1152. [2022-11-22 01:59:34,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1123 states have (on average 3.6927871772039182) internal successors, (4147), 1151 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:34,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 4147 transitions. [2022-11-22 01:59:34,885 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 4147 transitions. Word has length 9 [2022-11-22 01:59:34,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:34,885 INFO L495 AbstractCegarLoop]: Abstraction has 1152 states and 4147 transitions. [2022-11-22 01:59:34,885 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) [2022-11-22 01:59:34,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 4147 transitions. [2022-11-22 01:59:34,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:59:34,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:34,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:34,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:35,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:59:35,102 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:59:35,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:35,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1255873089, now seen corresponding path program 1 times [2022-11-22 01:59:35,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:59:35,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418796602] [2022-11-22 01:59:35,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:35,103 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:59:35,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:59:35,104 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:59:35,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-22 01:59:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:35,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 01:59:35,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:35,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:35,634 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:59:35,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418796602] [2022-11-22 01:59:35,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418796602] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:35,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [134497003] [2022-11-22 01:59:35,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:35,636 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:59:35,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:59:35,640 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:59:35,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-22 01:59:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:35,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:59:35,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:36,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:36,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:36,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [134497003] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:36,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390215738] [2022-11-22 01:59:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:36,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:36,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:36,076 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:59:36,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-22 01:59:36,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:36,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:59:36,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:36,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:36,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:36,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390215738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:36,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:59:36,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2022-11-22 01:59:36,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104044780] [2022-11-22 01:59:36,375 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:59:36,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 01:59:36,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:59:36,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 01:59:36,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:59:36,376 INFO L87 Difference]: Start difference. First operand 1152 states and 4147 transitions. Second operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:38,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:38,923 INFO L93 Difference]: Finished difference Result 1496 states and 5093 transitions. [2022-11-22 01:59:38,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 01:59:38,924 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-22 01:59:38,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:38,928 INFO L225 Difference]: With dead ends: 1496 [2022-11-22 01:59:38,928 INFO L226 Difference]: Without dead ends: 1496 [2022-11-22 01:59:38,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2022-11-22 01:59:38,928 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 231 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:38,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 46 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-22 01:59:38,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2022-11-22 01:59:38,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1238. [2022-11-22 01:59:38,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1209 states have (on average 3.6716294458229943) internal successors, (4439), 1237 states have internal predecessors, (4439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:38,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 4439 transitions. [2022-11-22 01:59:38,965 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 4439 transitions. Word has length 9 [2022-11-22 01:59:38,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:38,965 INFO L495 AbstractCegarLoop]: Abstraction has 1238 states and 4439 transitions. [2022-11-22 01:59:38,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:38,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 4439 transitions. [2022-11-22 01:59:38,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:59:38,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:38,966 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:38,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:39,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:39,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:39,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:39,579 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:59:39,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:39,580 INFO L85 PathProgramCache]: Analyzing trace with hash 284053002, now seen corresponding path program 1 times [2022-11-22 01:59:39,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:59:39,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976194931] [2022-11-22 01:59:39,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:39,580 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:59:39,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:59:39,581 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:59:39,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-22 01:59:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:39,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:59:39,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:39,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:39,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:40,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:40,179 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:59:40,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976194931] [2022-11-22 01:59:40,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976194931] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:40,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1502915189] [2022-11-22 01:59:40,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:40,179 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:59:40,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:59:40,180 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:59:40,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-22 01:59:40,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:40,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:59:40,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:40,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:40,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1502915189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:40,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625785712] [2022-11-22 01:59:40,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:40,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:40,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:40,659 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:59:40,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-22 01:59:40,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:40,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:59:40,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:40,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:41,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:59:41,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625785712] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:41,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:59:41,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2022-11-22 01:59:41,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500542889] [2022-11-22 01:59:41,020 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:59:41,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 01:59:41,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:59:41,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 01:59:41,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:59:41,021 INFO L87 Difference]: Start difference. First operand 1238 states and 4439 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2022-11-22 01:59:43,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:43,344 INFO L93 Difference]: Finished difference Result 1166 states and 3909 transitions. [2022-11-22 01:59:43,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 01:59:43,346 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 10 [2022-11-22 01:59:43,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:43,349 INFO L225 Difference]: With dead ends: 1166 [2022-11-22 01:59:43,349 INFO L226 Difference]: Without dead ends: 1166 [2022-11-22 01:59:43,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-11-22 01:59:43,350 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 178 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:43,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 24 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-22 01:59:43,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2022-11-22 01:59:43,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 1112. [2022-11-22 01:59:43,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1083 states have (on average 3.526315789473684) internal successors, (3819), 1111 states have internal predecessors, (3819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:43,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3819 transitions. [2022-11-22 01:59:43,382 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3819 transitions. Word has length 10 [2022-11-22 01:59:43,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:43,383 INFO L495 AbstractCegarLoop]: Abstraction has 1112 states and 3819 transitions. [2022-11-22 01:59:43,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2022-11-22 01:59:43,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3819 transitions. [2022-11-22 01:59:43,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 01:59:43,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:43,384 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:43,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:43,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:43,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:43,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:59:43,992 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:59:43,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:43,992 INFO L85 PathProgramCache]: Analyzing trace with hash 373954782, now seen corresponding path program 2 times [2022-11-22 01:59:43,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:59:43,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [38992490] [2022-11-22 01:59:43,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:59:43,993 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:59:43,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:59:43,994 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:59:43,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-22 01:59:44,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-22 01:59:44,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:59:44,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 01:59:44,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:44,318 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:59:44,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:59:44,498 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:59:44,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:59:44,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:44,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:59:44,666 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:59:44,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-22 01:59:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-22 01:59:44,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:59:44,807 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:59:44,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [38992490] [2022-11-22 01:59:44,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [38992490] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:59:44,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:59:44,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:59:44,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769154483] [2022-11-22 01:59:44,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:59:44,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:59:44,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:59:44,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:59:44,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:59:44,809 INFO L87 Difference]: Start difference. First operand 1112 states and 3819 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:45,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:45,579 INFO L93 Difference]: Finished difference Result 1082 states and 3447 transitions. [2022-11-22 01:59:45,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:59:45,580 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 11 [2022-11-22 01:59:45,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:45,583 INFO L225 Difference]: With dead ends: 1082 [2022-11-22 01:59:45,583 INFO L226 Difference]: Without dead ends: 1082 [2022-11-22 01:59:45,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:59:45,584 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 113 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:45,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 7 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 01:59:45,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2022-11-22 01:59:45,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 813. [2022-11-22 01:59:45,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 784 states have (on average 3.2895408163265305) internal successors, (2579), 812 states have internal predecessors, (2579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:45,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2579 transitions. [2022-11-22 01:59:45,613 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2579 transitions. Word has length 11 [2022-11-22 01:59:45,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:45,614 INFO L495 AbstractCegarLoop]: Abstraction has 813 states and 2579 transitions. [2022-11-22 01:59:45,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:45,614 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2579 transitions. [2022-11-22 01:59:45,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 01:59:45,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:45,615 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:45,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:45,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:59:45,830 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 01:59:45,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:45,830 INFO L85 PathProgramCache]: Analyzing trace with hash 407331455, now seen corresponding path program 2 times [2022-11-22 01:59:45,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:59:45,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1450435227] [2022-11-22 01:59:45,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:59:45,831 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:59:45,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:59:45,832 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:59:45,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-22 01:59:46,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:59:46,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:59:46,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:59:46,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:46,265 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-22 01:59:46,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-11-22 01:59:46,415 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:59:46,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:59:46,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:46,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-22 01:59:46,541 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:59:46,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-22 01:59:46,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:59:46,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:59:49,721 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:59:49,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1450435227] [2022-11-22 01:59:49,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1450435227] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:49,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [855807901] [2022-11-22 01:59:49,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:59:49,722 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:59:49,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:59:49,727 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:59:49,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-22 01:59:50,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:59:50,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:59:50,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 01:59:50,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:50,361 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:59:50,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:59:50,523 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:59:50,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:59:50,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:50,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 01:59:50,829 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:59:50,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-22 01:59:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:59:51,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:53,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:59:53,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [855807901] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:53,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813614938] [2022-11-22 01:59:53,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:59:53,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:53,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:53,455 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:59:53,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-22 01:59:53,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:59:53,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:59:53,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 01:59:53,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:53,938 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:59:53,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:59:54,136 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:59:54,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:59:54,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:54,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:59:54,558 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:59:54,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-22 01:59:55,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:59:55,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:59:57,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813614938] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:57,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:59:57,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 32 [2022-11-22 01:59:57,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985597801] [2022-11-22 01:59:57,342 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:59:57,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-22 01:59:57,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:59:57,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-22 01:59:57,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 01:59:57,344 INFO L87 Difference]: Start difference. First operand 813 states and 2579 transitions. Second operand has 34 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:00:08,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:00:08,390 INFO L93 Difference]: Finished difference Result 5133 states and 16898 transitions. [2022-11-22 02:00:08,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-22 02:00:08,391 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-22 02:00:08,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:00:08,408 INFO L225 Difference]: With dead ends: 5133 [2022-11-22 02:00:08,408 INFO L226 Difference]: Without dead ends: 5133 [2022-11-22 02:00:08,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=850, Invalid=3182, Unknown=0, NotChecked=0, Total=4032 [2022-11-22 02:00:08,410 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1482 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 1629 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1482 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:00:08,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1482 Valid, 182 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1629 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-11-22 02:00:08,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5133 states. [2022-11-22 02:00:08,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5133 to 1769. [2022-11-22 02:00:08,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1740 states have (on average 3.782183908045977) internal successors, (6581), 1768 states have internal predecessors, (6581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:00:08,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 6581 transitions. [2022-11-22 02:00:08,491 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 6581 transitions. Word has length 11 [2022-11-22 02:00:08,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:00:08,491 INFO L495 AbstractCegarLoop]: Abstraction has 1769 states and 6581 transitions. [2022-11-22 02:00:08,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:00:08,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 6581 transitions. [2022-11-22 02:00:08,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 02:00:08,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:00:08,492 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:00:08,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-22 02:00:08,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-22 02:00:08,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-22 02:00:09,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:00:09,098 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 02:00:09,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:00:09,099 INFO L85 PathProgramCache]: Analyzing trace with hash 407331457, now seen corresponding path program 1 times [2022-11-22 02:00:09,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:00:09,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1797714177] [2022-11-22 02:00:09,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:00:09,099 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:00:09,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:00:09,100 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:00:09,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-22 02:00:09,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:00:09,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:00:09,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:00:09,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:00:09,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:00:09,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2022-11-22 02:00:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:00:10,259 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:00:10,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1797714177] [2022-11-22 02:00:10,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1797714177] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:00:10,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1474881491] [2022-11-22 02:00:10,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:00:10,259 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:00:10,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:00:10,260 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:00:10,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-11-22 02:00:10,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:00:10,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:00:10,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:00:10,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 02:00:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:00:11,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:00:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:00:11,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1474881491] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:00:11,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140362402] [2022-11-22 02:00:11,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:00:11,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:00:11,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:00:11,712 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:00:11,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-22 02:00:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:00:11,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 02:00:11,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:00:11,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 02:00:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:00:12,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:00:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:00:13,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140362402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:00:13,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:00:13,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 30 [2022-11-22 02:00:13,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177723711] [2022-11-22 02:00:13,334 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:00:13,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-22 02:00:13,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:00:13,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-22 02:00:13,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-11-22 02:00:13,336 INFO L87 Difference]: Start difference. First operand 1769 states and 6581 transitions. Second operand has 31 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:00:26,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:00:26,873 INFO L93 Difference]: Finished difference Result 4389 states and 14711 transitions. [2022-11-22 02:00:26,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-22 02:00:26,874 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-22 02:00:26,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:00:26,886 INFO L225 Difference]: With dead ends: 4389 [2022-11-22 02:00:26,886 INFO L226 Difference]: Without dead ends: 4389 [2022-11-22 02:00:26,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=674, Invalid=2748, Unknown=0, NotChecked=0, Total=3422 [2022-11-22 02:00:26,887 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2159 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2159 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:00:26,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2159 Valid, 155 Invalid, 1676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-11-22 02:00:26,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4389 states. [2022-11-22 02:00:26,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4389 to 1594. [2022-11-22 02:00:26,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1565 states have (on average 3.6613418530351436) internal successors, (5730), 1593 states have internal predecessors, (5730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:00:26,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 5730 transitions. [2022-11-22 02:00:26,962 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 5730 transitions. Word has length 11 [2022-11-22 02:00:26,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:00:26,962 INFO L495 AbstractCegarLoop]: Abstraction has 1594 states and 5730 transitions. [2022-11-22 02:00:26,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:00:26,962 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 5730 transitions. [2022-11-22 02:00:26,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 02:00:26,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:00:26,963 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-22 02:00:26,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-22 02:00:27,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-22 02:00:27,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2022-11-22 02:00:27,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:00:27,577 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 02:00:27,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:00:27,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1511929215, now seen corresponding path program 3 times [2022-11-22 02:00:27,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:00:27,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050949172] [2022-11-22 02:00:27,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:00:27,579 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:00:27,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:00:27,580 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:00:27,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-22 02:00:27,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 02:00:27,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:00:27,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:00:27,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:00:28,002 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:00:28,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 02:00:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:00:28,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:00:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:00:32,055 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:00:32,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050949172] [2022-11-22 02:00:32,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050949172] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:00:32,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1884254406] [2022-11-22 02:00:32,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:00:32,056 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:00:32,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:00:32,056 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:00:32,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2022-11-22 02:00:32,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 02:00:32,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:00:32,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:00:32,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:00:33,046 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:00:33,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 02:00:33,213 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:00:33,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:00:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:00:33,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1884254406] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:00:33,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667427677] [2022-11-22 02:00:33,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:00:33,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:00:33,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:00:33,671 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:00:33,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-22 02:00:35,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 02:00:35,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:00:35,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:00:35,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:00:35,255 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:00:35,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 02:00:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:00:35,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:00:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:00:35,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667427677] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:00:35,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:00:35,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 22 [2022-11-22 02:00:35,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685171960] [2022-11-22 02:00:35,860 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:00:35,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 02:00:35,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:00:35,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 02:00:35,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:00:35,862 INFO L87 Difference]: Start difference. First operand 1594 states and 5730 transitions. Second operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:00:55,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:00:57,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:00:59,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:01:01,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:01:03,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:01:05,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:01:07,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:01:09,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:01:11,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:01:13,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:01:20,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:01:20,571 INFO L93 Difference]: Finished difference Result 8283 states and 28603 transitions. [2022-11-22 02:01:20,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-22 02:01:20,573 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-22 02:01:20,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:01:20,595 INFO L225 Difference]: With dead ends: 8283 [2022-11-22 02:01:20,595 INFO L226 Difference]: Without dead ends: 8283 [2022-11-22 02:01:20,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=406, Invalid=716, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 02:01:20,596 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1391 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 3593 mSolverCounterSat, 207 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1391 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 3810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 3593 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:01:20,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1391 Valid, 360 Invalid, 3810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 3593 Invalid, 10 Unknown, 0 Unchecked, 29.9s Time] [2022-11-22 02:01:20,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8283 states. [2022-11-22 02:01:20,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8283 to 1612. [2022-11-22 02:01:20,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1583 states have (on average 3.6424510423247) internal successors, (5766), 1611 states have internal predecessors, (5766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:01:20,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 5766 transitions. [2022-11-22 02:01:20,697 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 5766 transitions. Word has length 12 [2022-11-22 02:01:20,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:01:20,697 INFO L495 AbstractCegarLoop]: Abstraction has 1612 states and 5766 transitions. [2022-11-22 02:01:20,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:01:20,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 5766 transitions. [2022-11-22 02:01:20,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 02:01:20,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:01:20,698 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:01:20,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-22 02:01:20,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2022-11-22 02:01:21,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-22 02:01:21,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:01:21,311 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 02:01:21,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:01:21,312 INFO L85 PathProgramCache]: Analyzing trace with hash -250933876, now seen corresponding path program 2 times [2022-11-22 02:01:21,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:01:21,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130338320] [2022-11-22 02:01:21,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:01:21,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:01:21,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:01:21,314 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:01:21,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-22 02:01:21,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-22 02:01:21,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:01:21,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:01:21,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:01:21,664 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:01:21,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 02:01:21,818 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 02:01:21,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 02:01:21,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:21,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 02:01:21,933 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 02:01:21,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-22 02:01:22,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:01:22,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:01:22,098 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:01:22,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130338320] [2022-11-22 02:01:22,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130338320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:01:22,098 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:01:22,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:01:22,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885390328] [2022-11-22 02:01:22,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:01:22,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:01:22,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:01:22,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:01:22,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:01:22,100 INFO L87 Difference]: Start difference. First operand 1612 states and 5766 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:01:22,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:01:22,825 INFO L93 Difference]: Finished difference Result 2514 states and 9152 transitions. [2022-11-22 02:01:22,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:01:22,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-22 02:01:22,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:01:22,832 INFO L225 Difference]: With dead ends: 2514 [2022-11-22 02:01:22,833 INFO L226 Difference]: Without dead ends: 2514 [2022-11-22 02:01:22,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:01:22,833 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 131 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:01:22,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 7 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:01:22,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2514 states. [2022-11-22 02:01:22,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2514 to 1834. [2022-11-22 02:01:22,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1834 states, 1805 states have (on average 3.9058171745152355) internal successors, (7050), 1833 states have internal predecessors, (7050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:01:22,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 7050 transitions. [2022-11-22 02:01:22,880 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 7050 transitions. Word has length 12 [2022-11-22 02:01:22,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:01:22,881 INFO L495 AbstractCegarLoop]: Abstraction has 1834 states and 7050 transitions. [2022-11-22 02:01:22,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:01:22,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 7050 transitions. [2022-11-22 02:01:22,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 02:01:22,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:01:22,882 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:01:22,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-22 02:01:23,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:01:23,094 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 02:01:23,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:01:23,095 INFO L85 PathProgramCache]: Analyzing trace with hash -250933874, now seen corresponding path program 1 times [2022-11-22 02:01:23,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:01:23,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125983893] [2022-11-22 02:01:23,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:23,096 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:01:23,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:01:23,099 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:01:23,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-22 02:01:23,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:23,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:01:23,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:01:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:01:23,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:01:23,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-22 02:01:23,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:01:23,920 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:01:23,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125983893] [2022-11-22 02:01:23,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1125983893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:01:23,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1399418505] [2022-11-22 02:01:23,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:23,921 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:01:23,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:01:23,922 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:01:23,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-22 02:01:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:24,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:01:24,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:01:24,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 02:01:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:01:24,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:01:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:01:25,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1399418505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:01:25,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112827943] [2022-11-22 02:01:25,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:25,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:01:25,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:01:25,230 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:01:25,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-22 02:01:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:25,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:01:25,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:01:25,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:01:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:01:25,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:01:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:01:26,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112827943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:01:26,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:01:26,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 22 [2022-11-22 02:01:26,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519849337] [2022-11-22 02:01:26,262 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:01:26,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-22 02:01:26,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:01:26,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-22 02:01:26,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-11-22 02:01:26,263 INFO L87 Difference]: Start difference. First operand 1834 states and 7050 transitions. Second operand has 23 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 23 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) [2022-11-22 02:01:38,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:01:38,123 INFO L93 Difference]: Finished difference Result 8875 states and 30811 transitions. [2022-11-22 02:01:38,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-22 02:01:38,124 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 23 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 12 [2022-11-22 02:01:38,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:01:38,150 INFO L225 Difference]: With dead ends: 8875 [2022-11-22 02:01:38,150 INFO L226 Difference]: Without dead ends: 8875 [2022-11-22 02:01:38,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=645, Invalid=2111, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 02:01:38,151 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2199 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2199 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:01:38,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2199 Valid, 93 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-22 02:01:38,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8875 states. [2022-11-22 02:01:38,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8875 to 2278. [2022-11-22 02:01:38,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2249 states have (on average 3.9804357492218765) internal successors, (8952), 2277 states have internal predecessors, (8952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:01:38,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 8952 transitions. [2022-11-22 02:01:38,297 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 8952 transitions. Word has length 12 [2022-11-22 02:01:38,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:01:38,298 INFO L495 AbstractCegarLoop]: Abstraction has 2278 states and 8952 transitions. [2022-11-22 02:01:38,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 23 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) [2022-11-22 02:01:38,298 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 8952 transitions. [2022-11-22 02:01:38,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 02:01:38,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:01:38,299 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-22 02:01:38,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-11-22 02:01:38,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2022-11-22 02:01:38,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-22 02:01:38,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:01:38,912 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 02:01:38,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:01:38,912 INFO L85 PathProgramCache]: Analyzing trace with hash -257622058, now seen corresponding path program 3 times [2022-11-22 02:01:38,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:01:38,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1331723558] [2022-11-22 02:01:38,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:01:38,913 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:01:38,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:01:38,914 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:01:38,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-22 02:01:39,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 02:01:39,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:01:39,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:01:39,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:01:39,358 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:01:39,359 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 02:01:39,519 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 02:01:39,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 02:01:39,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:39,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 02:01:39,623 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 02:01:39,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-22 02:01:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:01:39,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:01:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 02:01:40,955 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:01:40,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1331723558] [2022-11-22 02:01:40,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1331723558] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:01:40,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [482944418] [2022-11-22 02:01:40,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:01:40,955 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:01:40,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:01:40,956 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:01:40,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-22 02:01:41,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 02:01:41,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:01:41,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:01:41,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:01:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:01:41,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:01:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:01:42,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [482944418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:01:42,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535220590] [2022-11-22 02:01:42,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:01:42,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:01:42,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:01:42,509 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:01:42,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-22 02:01:42,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 02:01:42,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:01:42,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:01:42,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:01:42,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:01:42,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:01:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 02:01:43,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535220590] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:01:43,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:01:43,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7, 7, 7, 7] total 26 [2022-11-22 02:01:43,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199739735] [2022-11-22 02:01:43,156 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:01:43,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-22 02:01:43,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:01:43,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-22 02:01:43,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2022-11-22 02:01:43,157 INFO L87 Difference]: Start difference. First operand 2278 states and 8952 transitions. Second operand has 28 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:02:00,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:02:00,413 INFO L93 Difference]: Finished difference Result 4464 states and 16048 transitions. [2022-11-22 02:02:00,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-22 02:02:00,415 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-22 02:02:00,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:02:00,426 INFO L225 Difference]: With dead ends: 4464 [2022-11-22 02:02:00,426 INFO L226 Difference]: Without dead ends: 4464 [2022-11-22 02:02:00,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=717, Invalid=2823, Unknown=0, NotChecked=0, Total=3540 [2022-11-22 02:02:00,427 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1474 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 1808 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1474 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 1873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:02:00,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1474 Valid, 206 Invalid, 1873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1808 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2022-11-22 02:02:00,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4464 states. [2022-11-22 02:02:00,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4464 to 2249. [2022-11-22 02:02:00,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2249 states, 2220 states have (on average 4.174324324324324) internal successors, (9267), 2248 states have internal predecessors, (9267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:02:00,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2249 states to 2249 states and 9267 transitions. [2022-11-22 02:02:00,504 INFO L78 Accepts]: Start accepts. Automaton has 2249 states and 9267 transitions. Word has length 12 [2022-11-22 02:02:00,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:02:00,504 INFO L495 AbstractCegarLoop]: Abstraction has 2249 states and 9267 transitions. [2022-11-22 02:02:00,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:02:00,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states and 9267 transitions. [2022-11-22 02:02:00,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 02:02:00,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:02:00,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:02:00,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-22 02:02:00,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2022-11-22 02:02:00,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-11-22 02:02:01,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:02:01,115 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 02:02:01,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:02:01,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1896873139, now seen corresponding path program 1 times [2022-11-22 02:02:01,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:02:01,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169838868] [2022-11-22 02:02:01,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:02:01,116 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:02:01,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:02:01,117 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:02:01,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-22 02:02:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:02:01,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 02:02:01,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:02:01,523 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:02:01,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 02:02:01,691 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 02:02:01,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 02:02:01,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:02:01,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 02:02:01,856 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 02:02:01,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-22 02:02:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:02:02,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:02:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:02:04,002 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:02:04,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169838868] [2022-11-22 02:02:04,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169838868] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:02:04,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [567742627] [2022-11-22 02:02:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:02:04,002 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:02:04,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:02:04,003 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:02:04,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-22 02:02:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:02:04,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:02:04,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:02:04,576 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:02:04,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 02:02:04,720 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 02:02:04,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 02:02:04,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:02:04,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 02:02:04,960 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 02:02:04,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-22 02:02:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:02:05,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:02:08,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:02:08,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [567742627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:02:08,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914353318] [2022-11-22 02:02:08,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:02:08,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:02:08,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:02:08,065 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:02:08,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-22 02:02:08,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:02:08,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 02:02:08,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:02:08,428 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:02:08,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 02:02:08,673 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-22 02:02:08,674 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 [2022-11-22 02:02:09,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:02:09,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:02:14,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:02:14,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914353318] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:02:14,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:02:14,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 24 [2022-11-22 02:02:14,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893597600] [2022-11-22 02:02:14,367 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:02:14,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-22 02:02:14,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:02:14,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-22 02:02:14,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-11-22 02:02:14,368 INFO L87 Difference]: Start difference. First operand 2249 states and 9267 transitions. Second operand has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:02:21,171 WARN L233 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 44 DAG size of output: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:02:37,322 WARN L233 SmtUtils]: Spent 7.55s on a formula simplification. DAG size of input: 55 DAG size of output: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:02:58,197 WARN L233 SmtUtils]: Spent 15.70s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:03:00,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:03:02,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:03:38,901 WARN L233 SmtUtils]: Spent 33.57s on a formula simplification. DAG size of input: 72 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:03:40,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:03:58,255 WARN L233 SmtUtils]: Spent 16.74s on a formula simplification. DAG size of input: 69 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:04:21,184 WARN L233 SmtUtils]: Spent 17.15s on a formula simplification. DAG size of input: 71 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:04:25,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:04:26,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:04:31,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:04:32,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:04:53,045 WARN L233 SmtUtils]: Spent 14.20s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:04:54,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:04:59,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:05:00,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:05:02,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:05:21,341 WARN L233 SmtUtils]: Spent 13.77s on a formula simplification. DAG size of input: 75 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:05:22,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:05:24,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:05:26,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:05:28,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:05:48,174 WARN L233 SmtUtils]: Spent 12.79s on a formula simplification that was a NOOP. DAG size: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:06:11,097 WARN L233 SmtUtils]: Spent 17.46s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:06:14,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:06:34,357 WARN L233 SmtUtils]: Spent 13.55s on a formula simplification that was a NOOP. DAG size: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:06:37,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:06:39,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:07:10,237 WARN L233 SmtUtils]: Spent 22.69s on a formula simplification. DAG size of input: 81 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:07:31,661 WARN L233 SmtUtils]: Spent 18.39s on a formula simplification. DAG size of input: 77 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:07:34,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:07:36,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:07:59,863 WARN L233 SmtUtils]: Spent 18.98s on a formula simplification. DAG size of input: 79 DAG size of output: 76 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:08:08,587 WARN L233 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 66 DAG size of output: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:08:10,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:08:12,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:08:15,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:08:29,356 WARN L233 SmtUtils]: Spent 11.06s on a formula simplification. DAG size of input: 68 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:08:33,608 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:08:35,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:08:40,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:08:42,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:08:48,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:08:49,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:08:53,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:08:54,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:08:56,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:08:59,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-22 02:09:01,053 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 [1] [2022-11-22 02:09:01,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:09:01,110 INFO L93 Difference]: Finished difference Result 5890 states and 23735 transitions. [2022-11-22 02:09:01,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-22 02:09:01,113 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-22 02:09:01,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:09:01,129 INFO L225 Difference]: With dead ends: 5890 [2022-11-22 02:09:01,129 INFO L226 Difference]: Without dead ends: 5890 [2022-11-22 02:09:01,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 317.0s TimeCoverageRelationStatistics Valid=569, Invalid=2182, Unknown=5, NotChecked=0, Total=2756 [2022-11-22 02:09:01,130 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1083 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 67 mSolverCounterUnsat, 23 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1083 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 23 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 98.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:09:01,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1083 Valid, 88 Invalid, 944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 854 Invalid, 23 Unknown, 0 Unchecked, 98.8s Time] [2022-11-22 02:09:01,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5890 states. [2022-11-22 02:09:01,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5890 to 3295. [2022-11-22 02:09:01,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 3266 states have (on average 4.293937538273117) internal successors, (14024), 3294 states have internal predecessors, (14024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:09:01,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 14024 transitions. [2022-11-22 02:09:01,245 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 14024 transitions. Word has length 12 [2022-11-22 02:09:01,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:09:01,245 INFO L495 AbstractCegarLoop]: Abstraction has 3295 states and 14024 transitions. [2022-11-22 02:09:01,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:09:01,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 14024 transitions. [2022-11-22 02:09:01,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 02:09:01,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:09:01,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:09:01,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-22 02:09:01,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2022-11-22 02:09:01,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-22 02:09:01,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:09:01,847 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2022-11-22 02:09:01,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:09:01,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1896873137, now seen corresponding path program 1 times [2022-11-22 02:09:01,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:09:01,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111762467] [2022-11-22 02:09:01,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:01,848 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:09:01,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:09:01,849 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:09:01,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-22 02:09:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:02,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 02:09:02,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:09:02,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 02:09:02,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:09:02,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:09:07,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:09:07,668 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:09:07,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111762467] [2022-11-22 02:09:07,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111762467] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:09:07,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1309522355] [2022-11-22 02:09:07,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:07,669 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:09:07,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:09:07,670 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:09:07,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2022-11-22 02:09:08,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:08,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:09:08,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:09:08,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 02:09:08,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:09:08,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:09:09,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 02:09:09,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1309522355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:09:09,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383395157] [2022-11-22 02:09:09,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:09:09,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:09:09,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:09:09,445 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:09:09,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f112f8d0-a94c-45a8-a052-ff3a5bb17984/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-22 02:09:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:09:09,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 02:09:09,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:09:09,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-22 02:09:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:09:10,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:09:16,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:09:16,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383395157] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:09:16,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:09:16,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 22 [2022-11-22 02:09:16,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857967633] [2022-11-22 02:09:16,720 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:09:16,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 02:09:16,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:09:16,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 02:09:16,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=443, Unknown=4, NotChecked=0, Total=552 [2022-11-22 02:09:16,722 INFO L87 Difference]: Start difference. First operand 3295 states and 14024 transitions. Second operand has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)