./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 05:26:41,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:26:41,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:26:41,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:26:41,484 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:26:41,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:26:41,486 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:26:41,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:26:41,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:26:41,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:26:41,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:26:41,498 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:26:41,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:26:41,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:26:41,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:26:41,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:26:41,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:26:41,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:26:41,505 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:26:41,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:26:41,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:26:41,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:26:41,510 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:26:41,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:26:41,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:26:41,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:26:41,514 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:26:41,515 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:26:41,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:26:41,516 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:26:41,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:26:41,517 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:26:41,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:26:41,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:26:41,519 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:26:41,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:26:41,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:26:41,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:26:41,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:26:41,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:26:41,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:26:41,523 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 05:26:41,542 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:26:41,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:26:41,543 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:26:41,543 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:26:41,543 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:26:41,544 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:26:41,544 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:26:41,544 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:26:41,544 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:26:41,544 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:26:41,544 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:26:41,545 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:26:41,545 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:26:41,545 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:26:41,545 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:26:41,545 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:26:41,545 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:26:41,546 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:26:41,546 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 05:26:41,546 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 05:26:41,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:26:41,547 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:26:41,547 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 05:26:41,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:26:41,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:26:41,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:26:41,547 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 05:26:41,548 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 05:26:41,548 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 05:26:41,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:26:41,548 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 05:26:41,548 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:26:41,548 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:26:41,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:26:41,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:26:41,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:26:41,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:26:41,549 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:26:41,549 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:26:41,550 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:26:41,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:26:41,550 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:26:41,550 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_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 [2022-12-14 05:26:41,734 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:26:41,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:26:41,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:26:41,756 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:26:41,757 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:26:41,758 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-12-14 05:26:44,336 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:26:44,678 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:26:44,678 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-12-14 05:26:44,711 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/data/e72ede774/36976e0e6fa245f680e847d846025138/FLAG6d964debe [2022-12-14 05:26:44,895 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/data/e72ede774/36976e0e6fa245f680e847d846025138 [2022-12-14 05:26:44,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:26:44,899 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:26:44,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:26:44,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:26:44,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:26:44,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:26:44" (1/1) ... [2022-12-14 05:26:44,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f6d6f24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:26:44, skipping insertion in model container [2022-12-14 05:26:44,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:26:44" (1/1) ... [2022-12-14 05:26:44,912 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:26:44,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:26:45,535 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_011e9c28-6de2-4a02-a867-9942ebec794d/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-12-14 05:26:45,553 WARN L623 FunctionHandler]: Unknown extern function swprintf [2022-12-14 05:26:45,558 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-12-14 05:26:45,567 WARN L569 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2022-12-14 05:26:45,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:26:45,851 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-12-14 05:26:45,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@408335bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:26:45, skipping insertion in model container [2022-12-14 05:26:45,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:26:45,851 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-12-14 05:26:45,853 INFO L158 Benchmark]: Toolchain (without parser) took 953.34ms. Allocated memory is still 142.6MB. Free memory was 108.4MB in the beginning and 84.7MB in the end (delta: 23.8MB). Peak memory consumption was 76.0MB. Max. memory is 16.1GB. [2022-12-14 05:26:45,853 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 98.6MB. Free memory is still 60.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 05:26:45,853 INFO L158 Benchmark]: CACSL2BoogieTranslator took 951.45ms. Allocated memory is still 142.6MB. Free memory was 108.4MB in the beginning and 84.7MB in the end (delta: 23.8MB). Peak memory consumption was 76.0MB. Max. memory is 16.1GB. [2022-12-14 05:26:45,854 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 98.6MB. Free memory is still 60.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 951.45ms. Allocated memory is still 142.6MB. Free memory was 108.4MB in the beginning and 84.7MB in the end (delta: 23.8MB). Peak memory consumption was 76.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2246]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 05:26:47,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:26:47,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:26:47,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:26:47,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:26:47,397 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:26:47,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:26:47,400 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:26:47,401 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:26:47,402 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:26:47,403 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:26:47,404 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:26:47,404 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:26:47,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:26:47,406 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:26:47,407 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:26:47,408 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:26:47,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:26:47,410 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:26:47,412 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:26:47,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:26:47,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:26:47,416 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:26:47,416 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:26:47,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:26:47,420 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:26:47,420 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:26:47,421 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:26:47,422 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:26:47,422 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:26:47,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:26:47,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:26:47,424 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:26:47,425 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:26:47,426 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:26:47,426 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:26:47,426 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:26:47,427 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:26:47,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:26:47,427 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:26:47,428 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:26:47,429 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-12-14 05:26:47,449 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:26:47,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:26:47,450 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:26:47,450 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:26:47,451 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:26:47,451 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:26:47,451 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:26:47,451 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:26:47,451 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:26:47,451 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:26:47,452 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:26:47,452 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:26:47,452 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 05:26:47,453 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 05:26:47,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:26:47,453 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:26:47,453 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 05:26:47,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:26:47,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:26:47,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:26:47,454 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 05:26:47,454 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 05:26:47,454 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 05:26:47,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:26:47,454 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 05:26:47,454 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 05:26:47,455 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 05:26:47,455 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:26:47,455 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:26:47,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:26:47,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 05:26:47,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:26:47,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:26:47,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:26:47,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:26:47,456 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 05:26:47,456 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 05:26:47,456 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:26:47,456 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 05:26:47,457 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_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 [2022-12-14 05:26:47,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:26:47,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:26:47,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:26:47,721 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:26:47,721 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:26:47,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-12-14 05:26:50,359 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:26:50,731 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:26:50,732 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2022-12-14 05:26:50,762 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/data/020014ae9/b7354bc21d3541048709df06862ecfd3/FLAG5f10f7ebb [2022-12-14 05:26:50,776 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/data/020014ae9/b7354bc21d3541048709df06862ecfd3 [2022-12-14 05:26:50,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:26:50,780 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:26:50,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:26:50,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:26:50,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:26:50,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:26:50" (1/1) ... [2022-12-14 05:26:50,786 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61a40cfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:26:50, skipping insertion in model container [2022-12-14 05:26:50,786 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:26:50" (1/1) ... [2022-12-14 05:26:50,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:26:50,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:26:51,369 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_011e9c28-6de2-4a02-a867-9942ebec794d/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-12-14 05:26:51,388 WARN L623 FunctionHandler]: Unknown extern function swprintf [2022-12-14 05:26:51,393 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-12-14 05:26:51,671 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:26:51,699 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-12-14 05:26:51,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:26:51,760 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_011e9c28-6de2-4a02-a867-9942ebec794d/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-12-14 05:26:51,764 WARN L623 FunctionHandler]: Unknown extern function swprintf [2022-12-14 05:26:51,766 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-12-14 05:26:51,927 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:26:51,946 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:26:51,986 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_011e9c28-6de2-4a02-a867-9942ebec794d/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c[77246,77259] [2022-12-14 05:26:51,995 WARN L623 FunctionHandler]: Unknown extern function swprintf [2022-12-14 05:26:51,997 WARN L623 FunctionHandler]: Unknown extern function sprintf [2022-12-14 05:26:52,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:26:52,252 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:26:52,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:26:52 WrapperNode [2022-12-14 05:26:52,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:26:52,253 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:26:52,254 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:26:52,254 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:26:52,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:26:52" (1/1) ... [2022-12-14 05:26:52,312 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:26:52" (1/1) ... [2022-12-14 05:26:52,397 INFO L138 Inliner]: procedures = 142, calls = 2895, calls flagged for inlining = 37, calls inlined = 26, statements flattened = 3030 [2022-12-14 05:26:52,397 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:26:52,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:26:52,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:26:52,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:26:52,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:26:52" (1/1) ... [2022-12-14 05:26:52,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:26:52" (1/1) ... [2022-12-14 05:26:52,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:26:52" (1/1) ... [2022-12-14 05:26:52,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:26:52" (1/1) ... [2022-12-14 05:26:52,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:26:52" (1/1) ... [2022-12-14 05:26:52,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:26:52" (1/1) ... [2022-12-14 05:26:52,531 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:26:52" (1/1) ... [2022-12-14 05:26:52,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:26:52" (1/1) ... [2022-12-14 05:26:52,559 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:26:52,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:26:52,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:26:52,560 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:26:52,560 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:26:52" (1/1) ... [2022-12-14 05:26:52,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:26:52,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:26:52,587 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:26:52,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:26:52,619 INFO L130 BoogieDeclarations]: Found specification of procedure IoGetConfigurationInformation [2022-12-14 05:26:52,620 INFO L138 BoogieDeclarations]: Found implementation of procedure IoGetConfigurationInformation [2022-12-14 05:26:52,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-12-14 05:26:52,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-12-14 05:26:52,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-12-14 05:26:52,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2022-12-14 05:26:52,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-12-14 05:26:52,620 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2022-12-14 05:26:52,620 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2022-12-14 05:26:52,620 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2022-12-14 05:26:52,621 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2022-12-14 05:26:52,621 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2022-12-14 05:26:52,621 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2022-12-14 05:26:52,621 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2022-12-14 05:26:52,621 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2022-12-14 05:26:52,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2022-12-14 05:26:52,621 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2022-12-14 05:26:52,621 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2022-12-14 05:26:52,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2022-12-14 05:26:52,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2022-12-14 05:26:52,622 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedExchange [2022-12-14 05:26:52,622 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedExchange [2022-12-14 05:26:52,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2022-12-14 05:26:52,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-12-14 05:26:52,622 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-12-14 05:26:52,622 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2022-12-14 05:26:52,622 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2022-12-14 05:26:52,622 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2022-12-14 05:26:52,622 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2022-12-14 05:26:52,622 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2022-12-14 05:26:52,622 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2022-12-14 05:26:52,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 05:26:52,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:26:52,623 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2022-12-14 05:26:52,623 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2022-12-14 05:26:52,623 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertTailList [2022-12-14 05:26:52,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertTailList [2022-12-14 05:26:52,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 05:26:52,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 05:26:52,623 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2022-12-14 05:26:52,647 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2022-12-14 05:26:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2022-12-14 05:26:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2022-12-14 05:26:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2022-12-14 05:26:52,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 05:26:52,648 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2022-12-14 05:26:52,648 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2022-12-14 05:26:52,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-12-14 05:26:52,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2022-12-14 05:26:52,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 05:26:52,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-12-14 05:26:52,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2022-12-14 05:26:52,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 05:26:52,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-12-14 05:26:52,648 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2022-12-14 05:26:52,649 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2022-12-14 05:26:52,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2022-12-14 05:26:52,649 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2022-12-14 05:26:52,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2022-12-14 05:26:52,649 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2022-12-14 05:26:52,649 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2022-12-14 05:26:52,649 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2022-12-14 05:26:52,649 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2022-12-14 05:26:52,649 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2022-12-14 05:26:52,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2022-12-14 05:26:52,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:26:52,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:26:53,006 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:26:53,008 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:26:53,063 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-14 05:26:53,075 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-12-14 05:26:53,075 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-12-14 05:26:53,080 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-14 05:26:53,537 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-12-14 05:26:53,537 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-12-14 05:26:53,584 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-14 05:26:53,598 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2022-12-14 05:26:53,598 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2022-12-14 05:26:53,604 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-14 05:26:55,725 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-14 05:26:55,745 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-14 05:26:55,791 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2022-12-14 05:26:55,791 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2022-12-14 05:26:55,794 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-14 05:26:55,795 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-14 05:26:55,796 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-14 05:26:56,209 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2022-12-14 05:26:56,209 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2022-12-14 05:26:56,209 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2022-12-14 05:26:56,209 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2022-12-14 05:26:56,209 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2022-12-14 05:26:56,209 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2022-12-14 05:26:56,216 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-14 05:26:56,244 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-14 05:26:56,246 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-14 05:27:00,352 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2022-12-14 05:27:00,352 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2022-12-14 05:27:00,352 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2022-12-14 05:27:00,352 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2022-12-14 05:27:00,352 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##124: assume !false; [2022-12-14 05:27:00,353 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##123: assume false; [2022-12-14 05:27:00,497 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-14 05:27:00,608 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2022-12-14 05:27:00,609 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2022-12-14 05:27:00,617 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-14 05:27:00,619 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-14 05:27:00,622 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-14 05:27:00,627 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-14 05:27:00,629 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-14 05:27:00,634 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-14 05:27:00,636 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-14 05:27:00,637 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-12-14 05:27:04,472 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##210: assume false; [2022-12-14 05:27:04,472 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##211: assume !false; [2022-12-14 05:27:04,472 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##97: assume !false; [2022-12-14 05:27:04,472 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##96: assume false; [2022-12-14 05:27:04,472 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##76: assume false; [2022-12-14 05:27:04,472 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##177: assume !false; [2022-12-14 05:27:04,473 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##176: assume false; [2022-12-14 05:27:04,473 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##77: assume !false; [2022-12-14 05:27:04,473 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##48: assume !false; [2022-12-14 05:27:04,473 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume false; [2022-12-14 05:27:04,473 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume !false; [2022-12-14 05:27:04,473 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume false; [2022-12-14 05:27:04,473 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##162: assume false; [2022-12-14 05:27:04,473 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##163: assume !false; [2022-12-14 05:27:04,473 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##108: assume !false; [2022-12-14 05:27:04,473 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##107: assume false; [2022-12-14 05:27:04,484 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:27:04,495 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:27:04,495 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 05:27:04,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:27:04 BoogieIcfgContainer [2022-12-14 05:27:04,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:27:04,499 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:27:04,499 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:27:04,502 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:27:04,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:26:50" (1/3) ... [2022-12-14 05:27:04,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fcb9225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:27:04, skipping insertion in model container [2022-12-14 05:27:04,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:26:52" (2/3) ... [2022-12-14 05:27:04,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fcb9225 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:27:04, skipping insertion in model container [2022-12-14 05:27:04,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:27:04" (3/3) ... [2022-12-14 05:27:04,504 INFO L112 eAbstractionObserver]: Analyzing ICFG floppy.i.cil-3.c [2022-12-14 05:27:04,517 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:27:04,517 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 954 error locations. [2022-12-14 05:27:04,564 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:27:04,568 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;@6d76a82e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:27:04,568 INFO L358 AbstractCegarLoop]: Starting to check reachability of 954 error locations. [2022-12-14 05:27:04,575 INFO L276 IsEmpty]: Start isEmpty. Operand has 2081 states, 1019 states have (on average 2.154072620215898) internal successors, (2195), 1997 states have internal predecessors, (2195), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2022-12-14 05:27:04,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 05:27:04,579 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:27:04,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 05:27:04,580 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-12-14 05:27:04,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:27:04,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1700083, now seen corresponding path program 1 times [2022-12-14 05:27:04,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:27:04,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662580499] [2022-12-14 05:27:04,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:27:04,596 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:27:04,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:27:04,597 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:27:04,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 05:27:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:27:06,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 1234 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 05:27:06,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:27:06,457 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-12-14 05:27:06,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 36 [2022-12-14 05:27:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:27:06,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:27:06,528 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:27:06,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662580499] [2022-12-14 05:27:06,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1662580499] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:27:06,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:27:06,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:27:06,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441660515] [2022-12-14 05:27:06,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:27:06,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:27:06,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:27:06,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:27:06,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:27:06,571 INFO L87 Difference]: Start difference. First operand has 2081 states, 1019 states have (on average 2.154072620215898) internal successors, (2195), 1997 states have internal predecessors, (2195), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 3 states, 2 states have (on average 1.5) 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) [2022-12-14 05:27:10,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:27:10,147 INFO L93 Difference]: Finished difference Result 2077 states and 2349 transitions. [2022-12-14 05:27:10,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:27:10,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) 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 [2022-12-14 05:27:10,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:27:10,163 INFO L225 Difference]: With dead ends: 2077 [2022-12-14 05:27:10,163 INFO L226 Difference]: Without dead ends: 2075 [2022-12-14 05:27:10,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:27:10,165 INFO L413 NwaCegarLoop]: 2312 mSDtfsCounter, 57 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 3654 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:27:10,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 3654 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-12-14 05:27:10,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2075 states. [2022-12-14 05:27:10,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2075 to 2075. [2022-12-14 05:27:10,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2075 states, 1017 states have (on average 2.1435594886922322) internal successors, (2180), 1991 states have internal predecessors, (2180), 95 states have call successors, (95), 20 states have call predecessors, (95), 19 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-12-14 05:27:10,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 2347 transitions. [2022-12-14 05:27:10,236 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 2347 transitions. Word has length 3 [2022-12-14 05:27:10,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:27:10,236 INFO L495 AbstractCegarLoop]: Abstraction has 2075 states and 2347 transitions. [2022-12-14 05:27:10,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) 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) [2022-12-14 05:27:10,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 2347 transitions. [2022-12-14 05:27:10,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 05:27:10,237 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:27:10,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 05:27:10,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 05:27:10,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:27:10,439 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-12-14 05:27:10,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:27:10,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1700084, now seen corresponding path program 1 times [2022-12-14 05:27:10,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:27:10,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1953342947] [2022-12-14 05:27:10,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:27:10,447 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:27:10,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:27:10,450 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:27:10,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 05:27:12,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:27:12,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 1234 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 05:27:12,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:27:12,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:27:12,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:27:12,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:27:12,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:27:12,406 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 05:27:12,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 47 [2022-12-14 05:27:12,427 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 22 treesize of output 20 [2022-12-14 05:27:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:27:12,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:27:12,469 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:27:12,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1953342947] [2022-12-14 05:27:12,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1953342947] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:27:12,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:27:12,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:27:12,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307130762] [2022-12-14 05:27:12,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:27:12,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:27:12,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:27:12,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:27:12,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:27:12,472 INFO L87 Difference]: Start difference. First operand 2075 states and 2347 transitions. Second operand has 3 states, 2 states have (on average 1.5) 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) [2022-12-14 05:27:17,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:27:17,025 INFO L93 Difference]: Finished difference Result 2073 states and 2345 transitions. [2022-12-14 05:27:17,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:27:17,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) 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 [2022-12-14 05:27:17,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:27:17,032 INFO L225 Difference]: With dead ends: 2073 [2022-12-14 05:27:17,032 INFO L226 Difference]: Without dead ends: 2073 [2022-12-14 05:27:17,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:27:17,033 INFO L413 NwaCegarLoop]: 2341 mSDtfsCounter, 5 mSDsluCounter, 1382 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 3723 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-12-14 05:27:17,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 3723 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-12-14 05:27:17,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2073 states. [2022-12-14 05:27:17,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2073 to 2073. [2022-12-14 05:27:17,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2073 states, 1017 states have (on average 2.1415929203539825) internal successors, (2178), 1989 states have internal predecessors, (2178), 95 states have call successors, (95), 20 states have call predecessors, (95), 19 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-12-14 05:27:17,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2073 states to 2073 states and 2345 transitions. [2022-12-14 05:27:17,069 INFO L78 Accepts]: Start accepts. Automaton has 2073 states and 2345 transitions. Word has length 3 [2022-12-14 05:27:17,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:27:17,070 INFO L495 AbstractCegarLoop]: Abstraction has 2073 states and 2345 transitions. [2022-12-14 05:27:17,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) 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) [2022-12-14 05:27:17,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2073 states and 2345 transitions. [2022-12-14 05:27:17,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 05:27:17,070 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:27:17,070 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 05:27:17,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 05:27:17,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:27:17,272 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-12-14 05:27:17,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:27:17,273 INFO L85 PathProgramCache]: Analyzing trace with hash -890788470, now seen corresponding path program 1 times [2022-12-14 05:27:17,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:27:17,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968721685] [2022-12-14 05:27:17,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:27:17,279 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:27:17,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:27:17,282 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:27:17,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 05:27:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:27:18,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 05:27:18,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:27:18,328 INFO L321 Elim1Store]: treesize reduction 150, result has 29.6 percent of original size [2022-12-14 05:27:18,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 70 [2022-12-14 05:27:18,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 13 treesize of output 9 [2022-12-14 05:27:18,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 11 [2022-12-14 05:27:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:27:18,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:27:18,397 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:27:18,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968721685] [2022-12-14 05:27:18,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1968721685] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:27:18,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:27:18,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:27:18,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981755441] [2022-12-14 05:27:18,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:27:18,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:27:18,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:27:18,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:27:18,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:27:18,399 INFO L87 Difference]: Start difference. First operand 2073 states and 2345 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:27:23,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:27:30,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:27:30,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:27:30,170 INFO L93 Difference]: Finished difference Result 2072 states and 2344 transitions. [2022-12-14 05:27:30,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:27:30,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 05:27:30,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:27:30,175 INFO L225 Difference]: With dead ends: 2072 [2022-12-14 05:27:30,175 INFO L226 Difference]: Without dead ends: 2072 [2022-12-14 05:27:30,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:27:30,176 INFO L413 NwaCegarLoop]: 2340 mSDtfsCounter, 4 mSDsluCounter, 4091 mSDsCounter, 0 mSdLazyCounter, 2934 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6431 SdHoareTripleChecker+Invalid, 2937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2934 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:27:30,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6431 Invalid, 2937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2934 Invalid, 2 Unknown, 0 Unchecked, 11.6s Time] [2022-12-14 05:27:30,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2022-12-14 05:27:30,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2072. [2022-12-14 05:27:30,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 1017 states have (on average 2.1406096361848572) internal successors, (2177), 1988 states have internal predecessors, (2177), 95 states have call successors, (95), 20 states have call predecessors, (95), 19 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-12-14 05:27:30,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 2344 transitions. [2022-12-14 05:27:30,206 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 2344 transitions. Word has length 6 [2022-12-14 05:27:30,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:27:30,206 INFO L495 AbstractCegarLoop]: Abstraction has 2072 states and 2344 transitions. [2022-12-14 05:27:30,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:27:30,206 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 2344 transitions. [2022-12-14 05:27:30,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 05:27:30,207 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:27:30,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 05:27:30,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-12-14 05:27:30,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:27:30,408 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-12-14 05:27:30,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:27:30,409 INFO L85 PathProgramCache]: Analyzing trace with hash -890788469, now seen corresponding path program 1 times [2022-12-14 05:27:30,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:27:30,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314109277] [2022-12-14 05:27:30,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:27:30,413 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:27:30,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:27:30,415 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:27:30,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 05:27:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:27:31,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 05:27:31,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:27:31,491 INFO L321 Elim1Store]: treesize reduction 130, result has 29.7 percent of original size [2022-12-14 05:27:31,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 60 [2022-12-14 05:27:31,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 13 treesize of output 9 [2022-12-14 05:27:31,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 13 treesize of output 9 [2022-12-14 05:27:31,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 21 treesize of output 9 [2022-12-14 05:27:31,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-12-14 05:27:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:27:31,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:27:31,625 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:27:31,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314109277] [2022-12-14 05:27:31,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1314109277] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:27:31,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:27:31,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:27:31,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683411275] [2022-12-14 05:27:31,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:27:31,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:27:31,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:27:31,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:27:31,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:27:31,627 INFO L87 Difference]: Start difference. First operand 2072 states and 2344 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:27:37,003 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 [] [2022-12-14 05:27:44,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-12-14 05:27:44,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:27:44,737 INFO L93 Difference]: Finished difference Result 2071 states and 2343 transitions. [2022-12-14 05:27:44,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:27:44,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 05:27:44,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:27:44,745 INFO L225 Difference]: With dead ends: 2071 [2022-12-14 05:27:44,745 INFO L226 Difference]: Without dead ends: 2071 [2022-12-14 05:27:44,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:27:44,746 INFO L413 NwaCegarLoop]: 2340 mSDtfsCounter, 2 mSDsluCounter, 4154 mSDsCounter, 0 mSdLazyCounter, 2869 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6494 SdHoareTripleChecker+Invalid, 2872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2869 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:27:44,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6494 Invalid, 2872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2869 Invalid, 2 Unknown, 0 Unchecked, 13.0s Time] [2022-12-14 05:27:44,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2022-12-14 05:27:44,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 2071. [2022-12-14 05:27:44,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2071 states, 1016 states have (on average 2.141732283464567) internal successors, (2176), 1987 states have internal predecessors, (2176), 95 states have call successors, (95), 20 states have call predecessors, (95), 19 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-12-14 05:27:44,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 2343 transitions. [2022-12-14 05:27:44,785 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 2343 transitions. Word has length 6 [2022-12-14 05:27:44,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:27:44,785 INFO L495 AbstractCegarLoop]: Abstraction has 2071 states and 2343 transitions. [2022-12-14 05:27:44,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:27:44,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 2343 transitions. [2022-12-14 05:27:44,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 05:27:44,786 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:27:44,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:27:44,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-14 05:27:44,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:27:44,987 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-12-14 05:27:44,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:27:44,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1867291348, now seen corresponding path program 1 times [2022-12-14 05:27:44,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:27:44,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [129412232] [2022-12-14 05:27:44,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:27:44,994 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:27:44,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:27:44,997 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:27:45,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-14 05:27:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:27:45,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 05:27:45,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:27:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:27:45,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:27:45,957 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:27:45,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [129412232] [2022-12-14 05:27:45,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [129412232] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:27:45,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:27:45,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:27:45,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626654656] [2022-12-14 05:27:45,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:27:45,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:27:45,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:27:45,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:27:45,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:27:45,959 INFO L87 Difference]: Start difference. First operand 2071 states and 2343 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 05:27:46,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:27:46,039 INFO L93 Difference]: Finished difference Result 2074 states and 2346 transitions. [2022-12-14 05:27:46,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:27:46,039 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-12-14 05:27:46,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:27:46,044 INFO L225 Difference]: With dead ends: 2074 [2022-12-14 05:27:46,044 INFO L226 Difference]: Without dead ends: 2072 [2022-12-14 05:27:46,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:27:46,044 INFO L413 NwaCegarLoop]: 2341 mSDtfsCounter, 2 mSDsluCounter, 4677 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 7018 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:27:46,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 7018 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:27:46,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2022-12-14 05:27:46,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 2072. [2022-12-14 05:27:46,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 1017 states have (on average 2.1406096361848572) internal successors, (2177), 1988 states have internal predecessors, (2177), 95 states have call successors, (95), 20 states have call predecessors, (95), 19 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-12-14 05:27:46,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 2344 transitions. [2022-12-14 05:27:46,070 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 2344 transitions. Word has length 13 [2022-12-14 05:27:46,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:27:46,071 INFO L495 AbstractCegarLoop]: Abstraction has 2072 states and 2344 transitions. [2022-12-14 05:27:46,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 05:27:46,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 2344 transitions. [2022-12-14 05:27:46,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 05:27:46,071 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:27:46,071 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:27:46,107 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-12-14 05:27:46,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:27:46,272 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-12-14 05:27:46,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:27:46,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1906515750, now seen corresponding path program 1 times [2022-12-14 05:27:46,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:27:46,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1947168344] [2022-12-14 05:27:46,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:27:46,274 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:27:46,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:27:46,275 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:27:46,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-14 05:27:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:27:47,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 1293 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 05:27:47,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:27:47,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:27:47,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:27:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:27:47,263 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:27:47,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1947168344] [2022-12-14 05:27:47,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1947168344] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:27:47,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1082860965] [2022-12-14 05:27:47,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:27:47,263 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:27:47,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:27:47,264 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:27:47,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-12-14 05:27:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:27:48,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 1293 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 05:27:48,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:27:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:27:48,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:27:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:27:48,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1082860965] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:27:48,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095871048] [2022-12-14 05:27:48,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:27:48,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:27:48,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:27:48,650 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:27:48,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 05:27:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:27:49,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 1293 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 05:27:49,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:27:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:27:49,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:27:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:27:49,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095871048] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:27:49,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:27:49,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2022-12-14 05:27:49,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120661016] [2022-12-14 05:27:49,929 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:27:49,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 05:27:49,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:27:49,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 05:27:49,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 05:27:49,931 INFO L87 Difference]: Start difference. First operand 2072 states and 2344 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 05:27:50,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:27:50,214 INFO L93 Difference]: Finished difference Result 2084 states and 2359 transitions. [2022-12-14 05:27:50,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 05:27:50,215 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2022-12-14 05:27:50,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:27:50,222 INFO L225 Difference]: With dead ends: 2084 [2022-12-14 05:27:50,222 INFO L226 Difference]: Without dead ends: 2082 [2022-12-14 05:27:50,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-12-14 05:27:50,223 INFO L413 NwaCegarLoop]: 2340 mSDtfsCounter, 8 mSDsluCounter, 7012 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 9352 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:27:50,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 9352 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:27:50,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2022-12-14 05:27:50,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 2082. [2022-12-14 05:27:50,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2082 states, 1026 states have (on average 2.1335282651072123) internal successors, (2189), 1997 states have internal predecessors, (2189), 95 states have call successors, (95), 21 states have call predecessors, (95), 20 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2022-12-14 05:27:50,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 2356 transitions. [2022-12-14 05:27:50,255 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 2356 transitions. Word has length 14 [2022-12-14 05:27:50,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:27:50,256 INFO L495 AbstractCegarLoop]: Abstraction has 2082 states and 2356 transitions. [2022-12-14 05:27:50,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 05:27:50,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 2356 transitions. [2022-12-14 05:27:50,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 05:27:50,256 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:27:50,256 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:27:50,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2022-12-14 05:27:50,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-14 05:27:50,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 05:27:50,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:27:50,859 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-12-14 05:27:50,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:27:50,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1829494956, now seen corresponding path program 2 times [2022-12-14 05:27:50,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:27:50,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1634292418] [2022-12-14 05:27:50,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:27:50,865 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:27:50,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:27:50,866 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:27:50,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-12-14 05:27:53,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 05:27:53,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:27:53,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 05:27:53,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:27:53,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:27:53,391 INFO L321 Elim1Store]: treesize reduction 178, result has 18.7 percent of original size [2022-12-14 05:27:53,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 81 [2022-12-14 05:27:54,660 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-12-14 05:27:54,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2022-12-14 05:27:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 05:27:54,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:27:54,765 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:27:54,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1634292418] [2022-12-14 05:27:54,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1634292418] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:27:54,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:27:54,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:27:54,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46037419] [2022-12-14 05:27:54,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:27:54,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:27:54,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:27:54,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:27:54,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:27:54,767 INFO L87 Difference]: Start difference. First operand 2082 states and 2356 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 05:28:13,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:28:13,248 INFO L93 Difference]: Finished difference Result 2431 states and 2784 transitions. [2022-12-14 05:28:13,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:28:13,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-12-14 05:28:13,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:28:13,255 INFO L225 Difference]: With dead ends: 2431 [2022-12-14 05:28:13,255 INFO L226 Difference]: Without dead ends: 2431 [2022-12-14 05:28:13,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:28:13,256 INFO L413 NwaCegarLoop]: 1618 mSDtfsCounter, 1888 mSDsluCounter, 1517 mSDsCounter, 0 mSdLazyCounter, 1943 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1888 SdHoareTripleChecker+Valid, 3135 SdHoareTripleChecker+Invalid, 1959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:28:13,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1888 Valid, 3135 Invalid, 1959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1943 Invalid, 0 Unknown, 0 Unchecked, 18.4s Time] [2022-12-14 05:28:13,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2431 states. [2022-12-14 05:28:13,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2431 to 2273. [2022-12-14 05:28:13,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2273 states, 1191 states have (on average 2.1007556675062973) internal successors, (2502), 2166 states have internal predecessors, (2502), 112 states have call successors, (112), 31 states have call predecessors, (112), 30 states have return successors, (91), 85 states have call predecessors, (91), 89 states have call successors, (91) [2022-12-14 05:28:13,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2273 states to 2273 states and 2705 transitions. [2022-12-14 05:28:13,301 INFO L78 Accepts]: Start accepts. Automaton has 2273 states and 2705 transitions. Word has length 17 [2022-12-14 05:28:13,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:28:13,302 INFO L495 AbstractCegarLoop]: Abstraction has 2273 states and 2705 transitions. [2022-12-14 05:28:13,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 05:28:13,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2273 states and 2705 transitions. [2022-12-14 05:28:13,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 05:28:13,302 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:28:13,302 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:28:13,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-12-14 05:28:13,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:28:13,503 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-12-14 05:28:13,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:28:13,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1829494955, now seen corresponding path program 1 times [2022-12-14 05:28:13,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:28:13,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473278114] [2022-12-14 05:28:13,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:13,506 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:28:13,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:28:13,507 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:28:13,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-14 05:28:14,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:14,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 1326 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 05:28:14,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:28:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:28:14,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:28:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:28:14,805 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:28:14,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473278114] [2022-12-14 05:28:14,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473278114] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:28:14,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2087539571] [2022-12-14 05:28:14,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:14,806 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:28:14,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:28:14,807 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:28:14,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-12-14 05:28:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:16,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 1326 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 05:28:16,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:28:16,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:28:16,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:28:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:28:16,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2087539571] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:28:16,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027671602] [2022-12-14 05:28:16,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:16,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:28:16,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:28:16,274 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:28:16,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 05:28:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:17,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 1326 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 05:28:17,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:28:17,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:28:17,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:28:18,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:28:18,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027671602] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:28:18,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:28:18,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2022-12-14 05:28:18,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388185509] [2022-12-14 05:28:18,265 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:28:18,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 05:28:18,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:28:18,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 05:28:18,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2022-12-14 05:28:18,267 INFO L87 Difference]: Start difference. First operand 2273 states and 2705 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 05:28:19,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:28:19,474 INFO L93 Difference]: Finished difference Result 2292 states and 2728 transitions. [2022-12-14 05:28:19,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 05:28:19,475 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2022-12-14 05:28:19,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:28:19,479 INFO L225 Difference]: With dead ends: 2292 [2022-12-14 05:28:19,479 INFO L226 Difference]: Without dead ends: 2282 [2022-12-14 05:28:19,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=376, Invalid=680, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 05:28:19,480 INFO L413 NwaCegarLoop]: 2340 mSDtfsCounter, 24 mSDsluCounter, 21018 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 23358 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:28:19,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 23358 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:28:19,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2282 states. [2022-12-14 05:28:19,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2282 to 2282. [2022-12-14 05:28:19,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2282 states, 1200 states have (on average 2.0908333333333333) internal successors, (2509), 2175 states have internal predecessors, (2509), 112 states have call successors, (112), 31 states have call predecessors, (112), 30 states have return successors, (91), 85 states have call predecessors, (91), 89 states have call successors, (91) [2022-12-14 05:28:19,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2282 states to 2282 states and 2712 transitions. [2022-12-14 05:28:19,506 INFO L78 Accepts]: Start accepts. Automaton has 2282 states and 2712 transitions. Word has length 17 [2022-12-14 05:28:19,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:28:19,506 INFO L495 AbstractCegarLoop]: Abstraction has 2282 states and 2712 transitions. [2022-12-14 05:28:19,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 05:28:19,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2282 states and 2712 transitions. [2022-12-14 05:28:19,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 05:28:19,507 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:28:19,507 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:28:19,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-12-14 05:28:19,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2022-12-14 05:28:19,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 05:28:20,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:28:20,110 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-12-14 05:28:20,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:28:20,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1174908437, now seen corresponding path program 2 times [2022-12-14 05:28:20,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:28:20,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1246028456] [2022-12-14 05:28:20,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:28:20,116 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 [2022-12-14 05:28:20,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:28:20,117 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:28:20,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-14 05:28:23,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 05:28:23,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:28:23,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 05:28:23,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:28:23,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:28:23,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:28:23,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:28:23,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:28:23,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:28:23,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:28:23,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:28:23,402 INFO L321 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-12-14 05:28:23,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 18 treesize of output 38 [2022-12-14 05:28:23,464 INFO L321 Elim1Store]: treesize reduction 30, result has 3.2 percent of original size [2022-12-14 05:28:23,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-12-14 05:28:23,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:28:23,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 05:28:23,944 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-14 05:28:23,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:28:23,944 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:28:23,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1246028456] [2022-12-14 05:28:23,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1246028456] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:28:23,944 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:28:23,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:28:23,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715195887] [2022-12-14 05:28:23,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:28:23,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:28:23,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:28:23,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:28:23,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:28:23,946 INFO L87 Difference]: Start difference. First operand 2282 states and 2712 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 05:28:43,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:28:43,243 INFO L93 Difference]: Finished difference Result 2314 states and 2756 transitions. [2022-12-14 05:28:43,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:28:43,244 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-12-14 05:28:43,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:28:43,248 INFO L225 Difference]: With dead ends: 2314 [2022-12-14 05:28:43,248 INFO L226 Difference]: Without dead ends: 2314 [2022-12-14 05:28:43,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:28:43,248 INFO L413 NwaCegarLoop]: 2284 mSDtfsCounter, 254 mSDsluCounter, 2666 mSDsCounter, 0 mSdLazyCounter, 1894 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 4950 SdHoareTripleChecker+Invalid, 1901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:28:43,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 4950 Invalid, 1901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1894 Invalid, 0 Unknown, 0 Unchecked, 19.2s Time] [2022-12-14 05:28:43,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-12-14 05:28:43,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 2288. [2022-12-14 05:28:43,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2288 states, 1205 states have (on average 2.086307053941909) internal successors, (2514), 2179 states have internal predecessors, (2514), 112 states have call successors, (112), 33 states have call predecessors, (112), 32 states have return successors, (91), 85 states have call predecessors, (91), 89 states have call successors, (91) [2022-12-14 05:28:43,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 2717 transitions. [2022-12-14 05:28:43,271 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 2717 transitions. Word has length 23 [2022-12-14 05:28:43,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:28:43,271 INFO L495 AbstractCegarLoop]: Abstraction has 2288 states and 2717 transitions. [2022-12-14 05:28:43,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 05:28:43,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 2717 transitions. [2022-12-14 05:28:43,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 05:28:43,272 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:28:43,272 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:28:43,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-14 05:28:43,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:28:43,474 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-12-14 05:28:43,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:28:43,475 INFO L85 PathProgramCache]: Analyzing trace with hash -489338443, now seen corresponding path program 1 times [2022-12-14 05:28:43,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:28:43,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728254033] [2022-12-14 05:28:43,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:43,480 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:28:43,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:28:43,483 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:28:43,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-12-14 05:28:44,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:44,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 1406 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 05:28:44,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:28:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:28:44,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:28:45,630 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:28:45,631 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:28:45,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728254033] [2022-12-14 05:28:45,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728254033] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:28:45,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1056914622] [2022-12-14 05:28:45,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:45,631 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:28:45,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:28:45,632 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:28:45,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-12-14 05:28:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:47,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 1406 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 05:28:47,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:28:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:28:47,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:28:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:28:47,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1056914622] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:28:47,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848571236] [2022-12-14 05:28:47,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:47,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:28:47,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:28:47,322 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:28:47,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 05:28:48,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:48,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 1406 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 05:28:48,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:28:48,994 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:28:48,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:28:50,321 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:28:50,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848571236] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:28:50,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:28:50,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 38 [2022-12-14 05:28:50,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444575471] [2022-12-14 05:28:50,322 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:28:50,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-14 05:28:50,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:28:50,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-14 05:28:50,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=959, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 05:28:50,323 INFO L87 Difference]: Start difference. First operand 2288 states and 2717 transitions. Second operand has 38 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 05:28:54,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:28:54,257 INFO L93 Difference]: Finished difference Result 2322 states and 2761 transitions. [2022-12-14 05:28:54,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-12-14 05:28:54,257 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2022-12-14 05:28:54,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:28:54,265 INFO L225 Difference]: With dead ends: 2322 [2022-12-14 05:28:54,266 INFO L226 Difference]: Without dead ends: 2306 [2022-12-14 05:28:54,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1438, Invalid=2852, Unknown=0, NotChecked=0, Total=4290 [2022-12-14 05:28:54,267 INFO L413 NwaCegarLoop]: 2342 mSDtfsCounter, 50 mSDsluCounter, 25739 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 28081 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:28:54,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 28081 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 05:28:54,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2306 states. [2022-12-14 05:28:54,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2306 to 2306. [2022-12-14 05:28:54,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 1223 states have (on average 2.070318887980376) internal successors, (2532), 2197 states have internal predecessors, (2532), 112 states have call successors, (112), 33 states have call predecessors, (112), 32 states have return successors, (91), 85 states have call predecessors, (91), 89 states have call successors, (91) [2022-12-14 05:28:54,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 2735 transitions. [2022-12-14 05:28:54,289 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 2735 transitions. Word has length 25 [2022-12-14 05:28:54,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:28:54,289 INFO L495 AbstractCegarLoop]: Abstraction has 2306 states and 2735 transitions. [2022-12-14 05:28:54,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 05:28:54,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 2735 transitions. [2022-12-14 05:28:54,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 05:28:54,289 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:28:54,290 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:28:54,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2022-12-14 05:28:54,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 05:28:54,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-12-14 05:28:54,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:28:54,893 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-12-14 05:28:54,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:28:54,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1797314357, now seen corresponding path program 2 times [2022-12-14 05:28:54,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:28:54,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012406348] [2022-12-14 05:28:54,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:28:54,898 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:28:54,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:28:54,899 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:28:54,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-14 05:28:57,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 05:28:57,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:28:57,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 1296 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 05:28:57,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:28:58,004 INFO L321 Elim1Store]: treesize reduction 420, result has 11.8 percent of original size [2022-12-14 05:28:58,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 24 case distinctions, treesize of input 91 treesize of output 123 [2022-12-14 05:29:01,409 INFO L321 Elim1Store]: treesize reduction 80, result has 31.0 percent of original size [2022-12-14 05:29:01,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 68 [2022-12-14 05:29:01,756 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-12-14 05:29:01,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:29:01,756 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:29:01,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012406348] [2022-12-14 05:29:01,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012406348] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:29:01,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:29:01,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:29:01,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039393684] [2022-12-14 05:29:01,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:29:01,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 05:29:01,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:29:01,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 05:29:01,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:29:01,758 INFO L87 Difference]: Start difference. First operand 2306 states and 2735 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 05:29:17,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:29:17,481 INFO L93 Difference]: Finished difference Result 3255 states and 3741 transitions. [2022-12-14 05:29:17,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:29:17,482 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-12-14 05:29:17,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:29:17,488 INFO L225 Difference]: With dead ends: 3255 [2022-12-14 05:29:17,488 INFO L226 Difference]: Without dead ends: 3255 [2022-12-14 05:29:17,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 05:29:17,489 INFO L413 NwaCegarLoop]: 1642 mSDtfsCounter, 1831 mSDsluCounter, 1958 mSDsCounter, 0 mSdLazyCounter, 2170 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1831 SdHoareTripleChecker+Valid, 3600 SdHoareTripleChecker+Invalid, 2187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.6s IncrementalHoareTripleChecker+Time [2022-12-14 05:29:17,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1831 Valid, 3600 Invalid, 2187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2170 Invalid, 0 Unknown, 0 Unchecked, 15.6s Time] [2022-12-14 05:29:17,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2022-12-14 05:29:17,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2741. [2022-12-14 05:29:17,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2741 states, 1629 states have (on average 2.0828729281767955) internal successors, (3393), 2604 states have internal predecessors, (3393), 138 states have call successors, (138), 46 states have call predecessors, (138), 43 states have return successors, (117), 101 states have call predecessors, (117), 115 states have call successors, (117) [2022-12-14 05:29:17,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2741 states to 2741 states and 3648 transitions. [2022-12-14 05:29:17,517 INFO L78 Accepts]: Start accepts. Automaton has 2741 states and 3648 transitions. Word has length 37 [2022-12-14 05:29:17,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:29:17,517 INFO L495 AbstractCegarLoop]: Abstraction has 2741 states and 3648 transitions. [2022-12-14 05:29:17,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 05:29:17,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2741 states and 3648 transitions. [2022-12-14 05:29:17,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 05:29:17,518 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:29:17,518 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:29:17,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-12-14 05:29:17,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:29:17,719 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-12-14 05:29:17,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:29:17,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1797314358, now seen corresponding path program 1 times [2022-12-14 05:29:17,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:29:17,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020977999] [2022-12-14 05:29:17,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:29:17,722 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:29:17,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:29:17,723 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:29:17,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-12-14 05:29:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:29:18,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 1538 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 05:29:18,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:29:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:29:19,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:29:22,670 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:29:22,671 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:29:22,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020977999] [2022-12-14 05:29:22,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2020977999] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:29:22,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [628609313] [2022-12-14 05:29:22,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:29:22,671 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:29:22,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:29:22,672 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:29:22,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2022-12-14 05:29:24,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:29:24,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 1538 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 05:29:24,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:29:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:29:24,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:29:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:29:24,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [628609313] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:29:24,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819000843] [2022-12-14 05:29:24,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:29:24,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:29:24,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:29:24,957 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:29:24,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 05:29:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:29:26,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 1538 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 05:29:26,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:29:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:29:26,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:29:31,177 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:29:31,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819000843] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:29:31,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:29:31,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 26, 26, 26] total 74 [2022-12-14 05:29:31,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819329216] [2022-12-14 05:29:31,177 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:29:31,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-12-14 05:29:31,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:29:31,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-12-14 05:29:31,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1617, Invalid=3785, Unknown=0, NotChecked=0, Total=5402 [2022-12-14 05:29:31,184 INFO L87 Difference]: Start difference. First operand 2741 states and 3648 transitions. Second operand has 74 states, 74 states have (on average 1.162162162162162) internal successors, (86), 74 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 05:29:46,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:29:46,000 INFO L93 Difference]: Finished difference Result 2841 states and 3770 transitions. [2022-12-14 05:29:46,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-12-14 05:29:46,002 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.162162162162162) internal successors, (86), 74 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2022-12-14 05:29:46,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:29:46,007 INFO L225 Difference]: With dead ends: 2841 [2022-12-14 05:29:46,007 INFO L226 Difference]: Without dead ends: 2789 [2022-12-14 05:29:46,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=5614, Invalid=11678, Unknown=0, NotChecked=0, Total=17292 [2022-12-14 05:29:46,010 INFO L413 NwaCegarLoop]: 2345 mSDtfsCounter, 85 mSDsluCounter, 56209 mSDsCounter, 0 mSdLazyCounter, 1752 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 58554 SdHoareTripleChecker+Invalid, 1836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-12-14 05:29:46,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 58554 Invalid, 1836 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [84 Valid, 1752 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-12-14 05:29:46,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2022-12-14 05:29:46,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 2789. [2022-12-14 05:29:46,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2789 states, 1677 states have (on average 2.0518783542039354) internal successors, (3441), 2652 states have internal predecessors, (3441), 138 states have call successors, (138), 46 states have call predecessors, (138), 43 states have return successors, (117), 101 states have call predecessors, (117), 115 states have call successors, (117) [2022-12-14 05:29:46,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2789 states to 2789 states and 3696 transitions. [2022-12-14 05:29:46,036 INFO L78 Accepts]: Start accepts. Automaton has 2789 states and 3696 transitions. Word has length 37 [2022-12-14 05:29:46,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:29:46,036 INFO L495 AbstractCegarLoop]: Abstraction has 2789 states and 3696 transitions. [2022-12-14 05:29:46,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.162162162162162) internal successors, (86), 74 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 05:29:46,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2789 states and 3696 transitions. [2022-12-14 05:29:46,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 05:29:46,037 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:29:46,037 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:29:46,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2022-12-14 05:29:46,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2022-12-14 05:29:46,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 05:29:46,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:29:46,640 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-12-14 05:29:46,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:29:46,642 INFO L85 PathProgramCache]: Analyzing trace with hash 283062838, now seen corresponding path program 2 times [2022-12-14 05:29:46,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:29:46,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1477691203] [2022-12-14 05:29:46,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:29:46,646 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:29:46,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:29:46,647 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:29:46,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-14 05:29:50,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 05:29:50,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:29:50,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 1296 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 05:29:50,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:29:50,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:50,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:50,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:50,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:50,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:50,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:50,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:50,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:50,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:50,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:50,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:50,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:50,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:50,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:50,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:50,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 15 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 34 [2022-12-14 05:29:51,225 INFO L321 Elim1Store]: treesize reduction 420, result has 11.8 percent of original size [2022-12-14 05:29:51,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 24 case distinctions, treesize of input 91 treesize of output 123 [2022-12-14 05:29:57,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:29:57,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 05:29:57,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-12-14 05:29:57,683 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:29:57,684 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:29:57,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1477691203] [2022-12-14 05:29:57,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1477691203] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:29:57,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:29:57,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:29:57,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613067526] [2022-12-14 05:29:57,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:29:57,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:29:57,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:29:57,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:29:57,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:29:57,686 INFO L87 Difference]: Start difference. First operand 2789 states and 3696 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 05:30:14,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 05:30:17,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 05:30:21,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 05:30:23,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 05:30:32,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:30:32,962 INFO L93 Difference]: Finished difference Result 4669 states and 5397 transitions. [2022-12-14 05:30:32,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:30:32,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-12-14 05:30:32,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:30:32,970 INFO L225 Difference]: With dead ends: 4669 [2022-12-14 05:30:32,970 INFO L226 Difference]: Without dead ends: 4669 [2022-12-14 05:30:32,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:30:32,970 INFO L413 NwaCegarLoop]: 1093 mSDtfsCounter, 5488 mSDsluCounter, 1766 mSDsCounter, 0 mSdLazyCounter, 3665 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5488 SdHoareTripleChecker+Valid, 2859 SdHoareTripleChecker+Invalid, 3851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 3665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:30:32,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5488 Valid, 2859 Invalid, 3851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 3665 Invalid, 0 Unknown, 0 Unchecked, 35.1s Time] [2022-12-14 05:30:32,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4669 states. [2022-12-14 05:30:33,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4669 to 3548. [2022-12-14 05:30:33,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3548 states, 2365 states have (on average 2.041014799154334) internal successors, (4827), 3343 states have internal predecessors, (4827), 192 states have call successors, (192), 70 states have call predecessors, (192), 69 states have return successors, (175), 152 states have call predecessors, (175), 169 states have call successors, (175) [2022-12-14 05:30:33,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 5194 transitions. [2022-12-14 05:30:33,010 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 5194 transitions. Word has length 61 [2022-12-14 05:30:33,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:30:33,010 INFO L495 AbstractCegarLoop]: Abstraction has 3548 states and 5194 transitions. [2022-12-14 05:30:33,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 05:30:33,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 5194 transitions. [2022-12-14 05:30:33,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 05:30:33,011 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:30:33,011 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:30:33,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-12-14 05:30:33,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:30:33,213 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-12-14 05:30:33,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:30:33,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1440500246, now seen corresponding path program 1 times [2022-12-14 05:30:33,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:30:33,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [525036676] [2022-12-14 05:30:33,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:30:33,221 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:30:33,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:30:33,224 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:30:33,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-12-14 05:30:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:30:34,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 1832 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 05:30:34,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:30:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:30:37,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:30:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:30:49,019 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:30:49,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [525036676] [2022-12-14 05:30:49,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [525036676] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:30:49,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [736432463] [2022-12-14 05:30:49,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:30:49,019 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:30:49,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:30:49,020 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:30:49,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2022-12-14 05:30:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:30:50,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 1832 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 05:30:50,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:30:51,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:30:51,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:30:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:30:52,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [736432463] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:30:52,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405739987] [2022-12-14 05:30:52,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:30:52,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:30:52,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:30:52,546 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:30:52,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 05:30:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:30:54,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 1832 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 05:30:54,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:30:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:30:54,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:31:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:31:14,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405739987] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:31:14,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:31:14,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50, 50, 50, 50] total 146 [2022-12-14 05:31:14,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029206015] [2022-12-14 05:31:14,325 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:31:14,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-12-14 05:31:14,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:31:14,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-12-14 05:31:14,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6117, Invalid=15053, Unknown=0, NotChecked=0, Total=21170 [2022-12-14 05:31:14,334 INFO L87 Difference]: Start difference. First operand 3548 states and 5194 transitions. Second operand has 146 states, 146 states have (on average 1.095890410958904) internal successors, (160), 146 states have internal predecessors, (160), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 05:32:30,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:32:30,099 INFO L93 Difference]: Finished difference Result 3816 states and 5508 transitions. [2022-12-14 05:32:30,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2022-12-14 05:32:30,100 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 1.095890410958904) internal successors, (160), 146 states have internal predecessors, (160), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 63 [2022-12-14 05:32:30,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:32:30,105 INFO L225 Difference]: With dead ends: 3816 [2022-12-14 05:32:30,105 INFO L226 Difference]: Without dead ends: 3668 [2022-12-14 05:32:30,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5351 ImplicationChecksByTransitivity, 91.0s TimeCoverageRelationStatistics Valid=22174, Invalid=47258, Unknown=0, NotChecked=0, Total=69432 [2022-12-14 05:32:30,113 INFO L413 NwaCegarLoop]: 2353 mSDtfsCounter, 159 mSDsluCounter, 117446 mSDsCounter, 0 mSdLazyCounter, 6351 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 119799 SdHoareTripleChecker+Invalid, 6502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 6351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:32:30,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 119799 Invalid, 6502 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [151 Valid, 6351 Invalid, 0 Unknown, 0 Unchecked, 14.3s Time] [2022-12-14 05:32:30,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3668 states. [2022-12-14 05:32:30,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3668 to 3668. [2022-12-14 05:32:30,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3668 states, 2485 states have (on average 1.9907444668008047) internal successors, (4947), 3463 states have internal predecessors, (4947), 192 states have call successors, (192), 70 states have call predecessors, (192), 69 states have return successors, (175), 152 states have call predecessors, (175), 169 states have call successors, (175) [2022-12-14 05:32:30,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3668 states to 3668 states and 5314 transitions. [2022-12-14 05:32:30,146 INFO L78 Accepts]: Start accepts. Automaton has 3668 states and 5314 transitions. Word has length 63 [2022-12-14 05:32:30,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:32:30,147 INFO L495 AbstractCegarLoop]: Abstraction has 3668 states and 5314 transitions. [2022-12-14 05:32:30,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 1.095890410958904) internal successors, (160), 146 states have internal predecessors, (160), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 05:32:30,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3668 states and 5314 transitions. [2022-12-14 05:32:30,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 05:32:30,148 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:32:30,148 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:32:30,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2022-12-14 05:32:30,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2022-12-14 05:32:30,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 05:32:30,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:32:30,749 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-12-14 05:32:30,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:32:30,750 INFO L85 PathProgramCache]: Analyzing trace with hash -387940330, now seen corresponding path program 2 times [2022-12-14 05:32:30,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:32:30,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463260848] [2022-12-14 05:32:30,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 05:32:30,754 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:32:30,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:32:30,755 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:32:30,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-12-14 05:32:32,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-14 05:32:32,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:32:32,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 1326 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 05:32:32,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:32:32,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:32:33,112 INFO L321 Elim1Store]: treesize reduction 154, result has 21.0 percent of original size [2022-12-14 05:32:33,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 63 [2022-12-14 05:32:34,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:32:34,640 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 20 [2022-12-14 05:32:34,779 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 05:32:34,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 05:32:34,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-12-14 05:32:34,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 05:32:34,838 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:32:34,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463260848] [2022-12-14 05:32:34,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463260848] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:32:34,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:32:34,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:32:34,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195376918] [2022-12-14 05:32:34,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:32:34,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:32:34,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:32:34,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:32:34,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:32:34,840 INFO L87 Difference]: Start difference. First operand 3668 states and 5314 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 05:32:56,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:32:56,171 INFO L93 Difference]: Finished difference Result 4186 states and 5418 transitions. [2022-12-14 05:32:56,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 05:32:56,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-12-14 05:32:56,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:32:56,179 INFO L225 Difference]: With dead ends: 4186 [2022-12-14 05:32:56,179 INFO L226 Difference]: Without dead ends: 4186 [2022-12-14 05:32:56,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:32:56,180 INFO L413 NwaCegarLoop]: 1639 mSDtfsCounter, 1863 mSDsluCounter, 2225 mSDsCounter, 0 mSdLazyCounter, 2539 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1863 SdHoareTripleChecker+Valid, 3864 SdHoareTripleChecker+Invalid, 2554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:32:56,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1863 Valid, 3864 Invalid, 2554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2539 Invalid, 0 Unknown, 0 Unchecked, 21.2s Time] [2022-12-14 05:32:56,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4186 states. [2022-12-14 05:32:56,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4186 to 3665. [2022-12-14 05:32:56,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3665 states, 2485 states have (on average 1.9895372233400404) internal successors, (4944), 3460 states have internal predecessors, (4944), 192 states have call successors, (192), 70 states have call predecessors, (192), 69 states have return successors, (175), 152 states have call predecessors, (175), 169 states have call successors, (175) [2022-12-14 05:32:56,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3665 states to 3665 states and 5311 transitions. [2022-12-14 05:32:56,236 INFO L78 Accepts]: Start accepts. Automaton has 3665 states and 5311 transitions. Word has length 111 [2022-12-14 05:32:56,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:32:56,236 INFO L495 AbstractCegarLoop]: Abstraction has 3665 states and 5311 transitions. [2022-12-14 05:32:56,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 05:32:56,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3665 states and 5311 transitions. [2022-12-14 05:32:56,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 05:32:56,237 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:32:56,238 INFO L195 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:32:56,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-12-14 05:32:56,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:32:56,438 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [FloppyProcessQueuedRequestsErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, FloppyProcessQueuedRequestsErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 952 more)] === [2022-12-14 05:32:56,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:32:56,439 INFO L85 PathProgramCache]: Analyzing trace with hash -387940329, now seen corresponding path program 1 times [2022-12-14 05:32:56,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 05:32:56,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [720773273] [2022-12-14 05:32:56,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:32:56,442 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 05:32:56,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 05:32:56,443 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 05:32:56,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-12-14 05:32:57,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:32:57,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 2360 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-14 05:32:57,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:33:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:33:08,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:33:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:33:51,864 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 05:33:51,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [720773273] [2022-12-14 05:33:51,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [720773273] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:33:51,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [805549928] [2022-12-14 05:33:51,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:33:51,864 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 05:33:51,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 05:33:51,865 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 05:33:51,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2022-12-14 05:33:54,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:33:54,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 2360 conjuncts, 97 conjunts are in the unsatisfiable core [2022-12-14 05:33:54,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:33:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:33:54,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:33:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:33:59,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [805549928] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:33:59,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596536071] [2022-12-14 05:33:59,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:33:59,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:33:59,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:33:59,473 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:33:59,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_011e9c28-6de2-4a02-a867-9942ebec794d/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 05:34:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:34:01,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 2360 conjuncts, 98 conjunts are in the unsatisfiable core [2022-12-14 05:34:01,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:34:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:34:02,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:35:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:35:17,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596536071] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:35:17,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 05:35:17,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98, 98, 98, 98] total 290 [2022-12-14 05:35:17,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751787184] [2022-12-14 05:35:17,149 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 05:35:17,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 290 states [2022-12-14 05:35:17,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 05:35:17,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 290 interpolants. [2022-12-14 05:35:17,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23757, Invalid=60053, Unknown=0, NotChecked=0, Total=83810 [2022-12-14 05:35:17,169 INFO L87 Difference]: Start difference. First operand 3665 states and 5311 transitions. Second operand has 290 states, 290 states have (on average 1.0482758620689656) internal successors, (304), 290 states have internal predecessors, (304), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3)