./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outl.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outl.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 345f2c82068eea48aca6314e15d35413af585b08222f0693277bcfbc8625f6ae --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:02:52,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:02:52,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:02:52,702 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:02:52,702 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:02:52,703 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:02:52,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:02:52,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:02:52,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:02:52,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:02:52,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:02:52,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:02:52,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:02:52,713 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:02:52,715 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:02:52,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:02:52,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:02:52,718 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:02:52,720 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:02:52,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:02:52,723 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:02:52,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:02:52,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:02:52,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:02:52,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:02:52,731 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:02:52,731 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:02:52,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:02:52,733 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:02:52,734 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:02:52,734 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:02:52,735 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:02:52,736 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:02:52,737 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:02:52,738 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:02:52,738 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:02:52,744 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:02:52,745 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:02:52,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:02:52,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:02:52,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:02:52,748 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 08:02:52,782 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:02:52,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:02:52,783 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:02:52,790 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:02:52,791 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:02:52,791 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:02:52,791 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:02:52,792 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:02:52,792 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:02:52,792 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:02:52,793 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:02:52,793 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:02:52,794 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:02:52,794 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:02:52,794 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:02:52,794 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:02:52,795 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:02:52,795 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:02:52,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 08:02:52,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 08:02:52,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:02:52,796 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:02:52,797 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 08:02:52,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:02:52,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:02:52,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:02:52,798 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 08:02:52,798 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 08:02:52,799 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 08:02:52,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:02:52,799 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 08:02:52,800 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:02:52,800 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:02:52,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:02:52,800 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:02:52,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:02:52,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:02:52,801 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:02:52,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:02:52,802 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:02:52,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:02:52,803 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:02:52,803 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_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 345f2c82068eea48aca6314e15d35413af585b08222f0693277bcfbc8625f6ae [2022-11-19 08:02:53,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:02:53,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:02:53,177 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:02:53,178 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:02:53,179 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:02:53,181 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outl.i [2022-11-19 08:02:53,254 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/data/1031db1d4/5555dfdf27c54c23b70e7ae9ad16298a/FLAGd010e1d25 [2022-11-19 08:02:54,033 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:02:54,034 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outl.i [2022-11-19 08:02:54,069 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/data/1031db1d4/5555dfdf27c54c23b70e7ae9ad16298a/FLAGd010e1d25 [2022-11-19 08:02:54,152 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/data/1031db1d4/5555dfdf27c54c23b70e7ae9ad16298a [2022-11-19 08:02:54,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:02:54,159 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:02:54,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:02:54,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:02:54,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:02:54,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:02:54" (1/1) ... [2022-11-19 08:02:54,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cad39eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:54, skipping insertion in model container [2022-11-19 08:02:54,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:02:54" (1/1) ... [2022-11-19 08:02:54,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:02:54,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:02:54,506 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outl.i[456,469] [2022-11-19 08:02:55,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:02:55,655 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-19 08:02:55,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@ff16eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:55, skipping insertion in model container [2022-11-19 08:02:55,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:02:55,657 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-19 08:02:55,659 INFO L158 Benchmark]: Toolchain (without parser) took 1498.97ms. Allocated memory is still 146.8MB. Free memory was 106.9MB in the beginning and 93.9MB in the end (delta: 13.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-19 08:02:55,659 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 146.8MB. Free memory is still 127.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:02:55,660 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1492.84ms. Allocated memory is still 146.8MB. Free memory was 106.7MB in the beginning and 93.9MB in the end (delta: 12.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-19 08:02:55,661 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 146.8MB. Free memory is still 127.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1492.84ms. Allocated memory is still 146.8MB. Free memory was 106.7MB in the beginning and 93.9MB in the end (delta: 12.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2975]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outl.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 345f2c82068eea48aca6314e15d35413af585b08222f0693277bcfbc8625f6ae --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:02:57,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:02:57,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:02:57,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:02:57,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:02:57,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:02:57,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:02:57,953 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:02:57,956 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:02:57,964 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:02:57,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:02:57,968 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:02:57,969 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:02:57,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:02:57,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:02:57,978 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:02:57,979 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:02:57,981 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:02:57,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:02:57,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:02:57,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:02:57,996 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:02:57,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:02:58,000 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:02:58,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:02:58,010 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:02:58,010 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:02:58,011 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:02:58,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:02:58,014 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:02:58,015 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:02:58,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:02:58,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:02:58,018 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:02:58,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:02:58,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:02:58,021 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:02:58,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:02:58,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:02:58,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:02:58,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:02:58,025 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-19 08:02:58,076 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:02:58,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:02:58,076 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:02:58,077 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:02:58,078 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:02:58,078 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:02:58,078 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:02:58,078 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:02:58,079 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:02:58,079 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:02:58,080 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:02:58,080 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:02:58,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 08:02:58,082 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 08:02:58,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:02:58,083 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:02:58,083 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 08:02:58,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:02:58,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:02:58,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:02:58,084 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 08:02:58,084 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 08:02:58,085 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 08:02:58,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:02:58,085 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 08:02:58,085 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 08:02:58,086 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 08:02:58,086 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:02:58,086 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:02:58,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:02:58,087 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 08:02:58,087 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:02:58,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:02:58,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:02:58,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:02:58,089 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 08:02:58,089 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 08:02:58,089 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:02:58,089 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 08:02:58,090 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_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 345f2c82068eea48aca6314e15d35413af585b08222f0693277bcfbc8625f6ae [2022-11-19 08:02:58,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:02:58,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:02:58,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:02:58,491 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:02:58,492 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:02:58,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outl.i [2022-11-19 08:02:58,567 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/data/1a1ad9252/998b59d93f1644f0a95893e18e3b637b/FLAG50143d4ee [2022-11-19 08:02:59,248 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:02:59,255 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outl.i [2022-11-19 08:02:59,292 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/data/1a1ad9252/998b59d93f1644f0a95893e18e3b637b/FLAG50143d4ee [2022-11-19 08:02:59,461 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/data/1a1ad9252/998b59d93f1644f0a95893e18e3b637b [2022-11-19 08:02:59,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:02:59,467 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:02:59,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:02:59,470 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:02:59,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:02:59,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:02:59" (1/1) ... [2022-11-19 08:02:59,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1caaff3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:59, skipping insertion in model container [2022-11-19 08:02:59,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:02:59" (1/1) ... [2022-11-19 08:02:59,484 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:02:59,577 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:02:59,798 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outl.i[456,469] [2022-11-19 08:03:00,879 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:03:00,940 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-19 08:03:00,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:03:00,976 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outl.i[456,469] [2022-11-19 08:03:01,214 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:03:01,244 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:03:01,257 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/sv-benchmarks/c/ddv-machzwd/ddv_machzwd_outl.i[456,469] [2022-11-19 08:03:01,474 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:03:01,661 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:03:01,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:01 WrapperNode [2022-11-19 08:03:01,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:03:01,663 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:03:01,663 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:03:01,663 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:03:01,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:01" (1/1) ... [2022-11-19 08:03:01,756 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:01" (1/1) ... [2022-11-19 08:03:01,884 INFO L138 Inliner]: procedures = 482, calls = 839, calls flagged for inlining = 54, calls inlined = 37, statements flattened = 966 [2022-11-19 08:03:01,885 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:03:01,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:03:01,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:03:01,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:03:01,895 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:01" (1/1) ... [2022-11-19 08:03:01,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:01" (1/1) ... [2022-11-19 08:03:01,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:01" (1/1) ... [2022-11-19 08:03:01,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:01" (1/1) ... [2022-11-19 08:03:01,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:01" (1/1) ... [2022-11-19 08:03:01,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:01" (1/1) ... [2022-11-19 08:03:02,020 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:01" (1/1) ... [2022-11-19 08:03:02,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:01" (1/1) ... [2022-11-19 08:03:02,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:03:02,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:03:02,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:03:02,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:03:02,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:01" (1/1) ... [2022-11-19 08:03:02,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:03:02,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:02,082 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:03:02,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:03:02,136 INFO L130 BoogieDeclarations]: Found specification of procedure zf_timer_off [2022-11-19 08:03:02,136 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_timer_off [2022-11-19 08:03:02,136 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_UINT~X~C_ULONG~TO~C_INT [2022-11-19 08:03:02,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_UINT~X~C_ULONG~TO~C_INT [2022-11-19 08:03:02,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-19 08:03:02,137 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_atomic_begin [2022-11-19 08:03:02,137 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-19 08:03:02,137 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-19 08:03:02,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:03:02,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2022-11-19 08:03:02,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 08:03:02,137 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-11-19 08:03:02,137 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-19 08:03:02,138 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-19 08:03:02,138 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-19 08:03:02,138 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_atomic_end [2022-11-19 08:03:02,138 INFO L130 BoogieDeclarations]: Found specification of procedure zf_get_control [2022-11-19 08:03:02,138 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_get_control [2022-11-19 08:03:02,138 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2022-11-19 08:03:02,138 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2022-11-19 08:03:02,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 08:03:02,138 INFO L130 BoogieDeclarations]: Found specification of procedure request_region [2022-11-19 08:03:02,139 INFO L138 BoogieDeclarations]: Found implementation of procedure request_region [2022-11-19 08:03:02,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:03:02,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 08:03:02,140 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-11-19 08:03:02,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-11-19 08:03:02,140 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irqsave [2022-11-19 08:03:02,140 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irqsave [2022-11-19 08:03:02,140 INFO L130 BoogieDeclarations]: Found specification of procedure release_region [2022-11-19 08:03:02,140 INFO L138 BoogieDeclarations]: Found implementation of procedure release_region [2022-11-19 08:03:02,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:03:02,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:03:02,141 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_init [2022-11-19 08:03:02,141 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_init [2022-11-19 08:03:02,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2022-11-19 08:03:02,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-19 08:03:02,141 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2022-11-19 08:03:02,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-19 08:03:02,141 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 08:03:02,141 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 08:03:02,142 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2022-11-19 08:03:02,142 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2022-11-19 08:03:02,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 08:03:02,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 08:03:02,144 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2022-11-19 08:03:02,144 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2022-11-19 08:03:02,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2022-11-19 08:03:02,145 INFO L130 BoogieDeclarations]: Found specification of procedure cdev_add [2022-11-19 08:03:02,145 INFO L138 BoogieDeclarations]: Found implementation of procedure cdev_add [2022-11-19 08:03:02,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-19 08:03:02,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2022-11-19 08:03:02,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-19 08:03:02,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 08:03:02,146 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2022-11-19 08:03:02,146 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2022-11-19 08:03:02,146 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2022-11-19 08:03:02,146 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2022-11-19 08:03:02,146 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2022-11-19 08:03:02,146 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2022-11-19 08:03:02,146 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2022-11-19 08:03:02,146 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2022-11-19 08:03:02,147 INFO L130 BoogieDeclarations]: Found specification of procedure assert_context_process [2022-11-19 08:03:02,147 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_context_process [2022-11-19 08:03:02,147 INFO L130 BoogieDeclarations]: Found specification of procedure zf_set_control [2022-11-19 08:03:02,147 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_set_control [2022-11-19 08:03:02,147 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~$Pointer$~TO~C_LONG [2022-11-19 08:03:02,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~C_ULONG~X~$Pointer$~TO~C_LONG [2022-11-19 08:03:02,148 INFO L130 BoogieDeclarations]: Found specification of procedure zf_readw [2022-11-19 08:03:02,148 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_readw [2022-11-19 08:03:02,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2022-11-19 08:03:02,148 INFO L130 BoogieDeclarations]: Found specification of procedure zf_ping [2022-11-19 08:03:02,149 INFO L138 BoogieDeclarations]: Found implementation of procedure zf_ping [2022-11-19 08:03:02,149 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-19 08:03:02,149 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-19 08:03:02,149 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~C_ULONG~TO~VOID [2022-11-19 08:03:02,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~C_ULONG~TO~VOID [2022-11-19 08:03:02,658 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:03:02,661 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:03:08,200 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:03:08,211 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:03:08,211 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-19 08:03:08,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:08 BoogieIcfgContainer [2022-11-19 08:03:08,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:03:08,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:03:08,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:03:08,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:03:08,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:02:59" (1/3) ... [2022-11-19 08:03:08,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a9946d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:08, skipping insertion in model container [2022-11-19 08:03:08,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:03:01" (2/3) ... [2022-11-19 08:03:08,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a9946d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:03:08, skipping insertion in model container [2022-11-19 08:03:08,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:03:08" (3/3) ... [2022-11-19 08:03:08,234 INFO L112 eAbstractionObserver]: Analyzing ICFG ddv_machzwd_outl.i [2022-11-19 08:03:08,253 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:03:08,254 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 205 error locations. [2022-11-19 08:03:08,331 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:03:08,340 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;@73ee3293, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:03:08,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 205 error locations. [2022-11-19 08:03:08,346 INFO L276 IsEmpty]: Start isEmpty. Operand has 664 states, 354 states have (on average 1.8220338983050848) internal successors, (645), 565 states have internal predecessors, (645), 78 states have call successors, (78), 26 states have call predecessors, (78), 26 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-19 08:03:08,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 08:03:08,353 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:08,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 08:03:08,354 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-11-19 08:03:08,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:08,363 INFO L85 PathProgramCache]: Analyzing trace with hash 327228190, now seen corresponding path program 1 times [2022-11-19 08:03:08,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:03:08,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348837025] [2022-11-19 08:03:08,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:08,386 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:03:08,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:03:08,396 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:03:08,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-19 08:03:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:08,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:03:08,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:03:09,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:03:09,100 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:03:09,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348837025] [2022-11-19 08:03:09,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348837025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:09,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:03:09,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:03:09,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472837132] [2022-11-19 08:03:09,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:09,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:03:09,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:03:09,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:03:09,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:03:09,149 INFO L87 Difference]: Start difference. First operand has 664 states, 354 states have (on average 1.8220338983050848) internal successors, (645), 565 states have internal predecessors, (645), 78 states have call successors, (78), 26 states have call predecessors, (78), 26 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:03:11,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:13,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:16,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:16,780 INFO L93 Difference]: Finished difference Result 1200 states and 1437 transitions. [2022-11-19 08:03:16,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:03:16,783 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 08:03:16,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:16,800 INFO L225 Difference]: With dead ends: 1200 [2022-11-19 08:03:16,800 INFO L226 Difference]: Without dead ends: 1196 [2022-11-19 08:03:16,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:03:16,805 INFO L413 NwaCegarLoop]: 753 mSDtfsCounter, 684 mSDsluCounter, 1710 mSDsCounter, 0 mSdLazyCounter, 1106 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 2463 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1106 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:16,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 2463 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1106 Invalid, 2 Unknown, 0 Unchecked, 7.4s Time] [2022-11-19 08:03:16,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2022-11-19 08:03:16,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 983. [2022-11-19 08:03:16,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 983 states, 590 states have (on average 1.805084745762712) internal successors, (1065), 812 states have internal predecessors, (1065), 138 states have call successors, (138), 50 states have call predecessors, (138), 50 states have return successors, (138), 131 states have call predecessors, (138), 138 states have call successors, (138) [2022-11-19 08:03:16,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 983 states to 983 states and 1341 transitions. [2022-11-19 08:03:16,921 INFO L78 Accepts]: Start accepts. Automaton has 983 states and 1341 transitions. Word has length 5 [2022-11-19 08:03:16,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:16,922 INFO L495 AbstractCegarLoop]: Abstraction has 983 states and 1341 transitions. [2022-11-19 08:03:16,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:03:16,922 INFO L276 IsEmpty]: Start isEmpty. Operand 983 states and 1341 transitions. [2022-11-19 08:03:16,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 08:03:16,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:16,923 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 08:03:16,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:03:17,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:03:17,137 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-11-19 08:03:17,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:17,138 INFO L85 PathProgramCache]: Analyzing trace with hash 327228191, now seen corresponding path program 1 times [2022-11-19 08:03:17,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:03:17,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22276906] [2022-11-19 08:03:17,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:17,139 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:03:17,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:03:17,140 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:03:17,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-19 08:03:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:17,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:03:17,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:03:17,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:03:17,759 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:03:17,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22276906] [2022-11-19 08:03:17,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22276906] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:17,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:03:17,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:03:17,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424427289] [2022-11-19 08:03:17,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:17,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:03:17,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:03:17,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:03:17,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:03:17,763 INFO L87 Difference]: Start difference. First operand 983 states and 1341 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:03:19,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:21,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:24,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:24,964 INFO L93 Difference]: Finished difference Result 1115 states and 1433 transitions. [2022-11-19 08:03:24,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:03:24,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 08:03:24,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:24,973 INFO L225 Difference]: With dead ends: 1115 [2022-11-19 08:03:24,973 INFO L226 Difference]: Without dead ends: 1115 [2022-11-19 08:03:24,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:03:24,975 INFO L413 NwaCegarLoop]: 837 mSDtfsCounter, 268 mSDsluCounter, 1781 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 2618 SdHoareTripleChecker+Invalid, 853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:24,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 2618 Invalid, 853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 850 Invalid, 2 Unknown, 0 Unchecked, 7.0s Time] [2022-11-19 08:03:24,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2022-11-19 08:03:25,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 1056. [2022-11-19 08:03:25,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 631 states have (on average 1.7670364500792393) internal successors, (1115), 854 states have internal predecessors, (1115), 157 states have call successors, (157), 63 states have call predecessors, (157), 63 states have return successors, (157), 150 states have call predecessors, (157), 157 states have call successors, (157) [2022-11-19 08:03:25,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1429 transitions. [2022-11-19 08:03:25,021 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1429 transitions. Word has length 5 [2022-11-19 08:03:25,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:25,021 INFO L495 AbstractCegarLoop]: Abstraction has 1056 states and 1429 transitions. [2022-11-19 08:03:25,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:03:25,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1429 transitions. [2022-11-19 08:03:25,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:03:25,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:25,022 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:25,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-19 08:03:25,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:03:25,238 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-11-19 08:03:25,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:25,239 INFO L85 PathProgramCache]: Analyzing trace with hash -27521378, now seen corresponding path program 1 times [2022-11-19 08:03:25,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:03:25,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521319595] [2022-11-19 08:03:25,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:25,240 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:03:25,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:03:25,245 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:03:25,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-19 08:03:25,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:25,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:03:25,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:25,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:03:25,916 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:03:25,916 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:03:25,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521319595] [2022-11-19 08:03:25,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521319595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:25,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:03:25,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:03:25,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075055301] [2022-11-19 08:03:25,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:25,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:03:25,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:03:25,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:03:25,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:03:25,923 INFO L87 Difference]: Start difference. First operand 1056 states and 1429 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-11-19 08:03:27,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:27,557 INFO L93 Difference]: Finished difference Result 1262 states and 1516 transitions. [2022-11-19 08:03:27,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:03:27,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 11 [2022-11-19 08:03:27,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:27,563 INFO L225 Difference]: With dead ends: 1262 [2022-11-19 08:03:27,563 INFO L226 Difference]: Without dead ends: 1262 [2022-11-19 08:03:27,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:03:27,565 INFO L413 NwaCegarLoop]: 739 mSDtfsCounter, 657 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:27,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [657 Valid, 1284 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-19 08:03:27,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1262 states. [2022-11-19 08:03:27,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1262 to 1055. [2022-11-19 08:03:27,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 631 states have (on average 1.7591125198098256) internal successors, (1110), 853 states have internal predecessors, (1110), 157 states have call successors, (157), 63 states have call predecessors, (157), 63 states have return successors, (157), 150 states have call predecessors, (157), 157 states have call successors, (157) [2022-11-19 08:03:27,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1424 transitions. [2022-11-19 08:03:27,603 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1424 transitions. Word has length 11 [2022-11-19 08:03:27,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:27,603 INFO L495 AbstractCegarLoop]: Abstraction has 1055 states and 1424 transitions. [2022-11-19 08:03:27,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2022-11-19 08:03:27,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1424 transitions. [2022-11-19 08:03:27,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-19 08:03:27,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:27,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:27,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-19 08:03:27,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:03:27,828 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-11-19 08:03:27,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:27,828 INFO L85 PathProgramCache]: Analyzing trace with hash -27521377, now seen corresponding path program 1 times [2022-11-19 08:03:27,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:03:27,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751757404] [2022-11-19 08:03:27,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:27,829 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:03:27,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:03:27,830 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:03:27,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-19 08:03:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:28,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:03:28,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:28,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:03:28,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:03:28,468 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:03:28,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751757404] [2022-11-19 08:03:28,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751757404] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:28,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:03:28,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:03:28,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333469331] [2022-11-19 08:03:28,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:28,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:03:28,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:03:28,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:03:28,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:03:28,470 INFO L87 Difference]: Start difference. First operand 1055 states and 1424 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-11-19 08:03:30,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:32,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:32,939 INFO L93 Difference]: Finished difference Result 1121 states and 1439 transitions. [2022-11-19 08:03:32,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:03:32,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 11 [2022-11-19 08:03:32,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:32,945 INFO L225 Difference]: With dead ends: 1121 [2022-11-19 08:03:32,945 INFO L226 Difference]: Without dead ends: 1121 [2022-11-19 08:03:32,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:03:32,946 INFO L413 NwaCegarLoop]: 834 mSDtfsCounter, 261 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:32,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 1988 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 574 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2022-11-19 08:03:32,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2022-11-19 08:03:32,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 1058. [2022-11-19 08:03:32,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 634 states have (on average 1.7555205047318612) internal successors, (1113), 856 states have internal predecessors, (1113), 157 states have call successors, (157), 63 states have call predecessors, (157), 63 states have return successors, (157), 150 states have call predecessors, (157), 157 states have call successors, (157) [2022-11-19 08:03:32,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 1427 transitions. [2022-11-19 08:03:32,978 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 1427 transitions. Word has length 11 [2022-11-19 08:03:32,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:32,979 INFO L495 AbstractCegarLoop]: Abstraction has 1058 states and 1427 transitions. [2022-11-19 08:03:32,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2022-11-19 08:03:32,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 1427 transitions. [2022-11-19 08:03:32,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:03:32,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:32,980 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:33,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:03:33,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:03:33,195 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-11-19 08:03:33,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:33,196 INFO L85 PathProgramCache]: Analyzing trace with hash 449678287, now seen corresponding path program 1 times [2022-11-19 08:03:33,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:03:33,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874015457] [2022-11-19 08:03:33,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:33,197 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:03:33,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:03:33,198 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:03:33,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-19 08:03:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:33,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:03:33,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:33,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:03:33,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:03:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:03:34,246 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:03:34,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [874015457] [2022-11-19 08:03:34,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [874015457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:03:34,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [622192242] [2022-11-19 08:03:34,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:34,247 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:03:34,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:03:34,254 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:03:34,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2022-11-19 08:03:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:35,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:03:35,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:35,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:03:35,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:03:35,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:03:35,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [622192242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:03:35,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908476454] [2022-11-19 08:03:35,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:35,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:35,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:35,599 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:03:35,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:03:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:36,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:03:36,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:03:36,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:03:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:03:36,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908476454] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:03:36,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:03:36,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 3, 4, 3, 4] total 7 [2022-11-19 08:03:36,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381428450] [2022-11-19 08:03:36,286 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:03:36,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:03:36,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:03:36,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:03:36,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:03:36,287 INFO L87 Difference]: Start difference. First operand 1058 states and 1427 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:03:38,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:40,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:48,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:48,233 INFO L93 Difference]: Finished difference Result 1331 states and 1673 transitions. [2022-11-19 08:03:48,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:03:48,234 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2022-11-19 08:03:48,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:48,240 INFO L225 Difference]: With dead ends: 1331 [2022-11-19 08:03:48,240 INFO L226 Difference]: Without dead ends: 1331 [2022-11-19 08:03:48,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:03:48,241 INFO L413 NwaCegarLoop]: 835 mSDtfsCounter, 1046 mSDsluCounter, 2360 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 85 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 3195 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:48,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1058 Valid, 3195 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1355 Invalid, 2 Unknown, 0 Unchecked, 11.6s Time] [2022-11-19 08:03:48,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2022-11-19 08:03:48,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1205. [2022-11-19 08:03:48,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 738 states have (on average 1.7411924119241193) internal successors, (1285), 962 states have internal predecessors, (1285), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2022-11-19 08:03:48,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1653 transitions. [2022-11-19 08:03:48,277 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1653 transitions. Word has length 14 [2022-11-19 08:03:48,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:48,277 INFO L495 AbstractCegarLoop]: Abstraction has 1205 states and 1653 transitions. [2022-11-19 08:03:48,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:03:48,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1653 transitions. [2022-11-19 08:03:48,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 08:03:48,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:48,279 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:48,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:03:48,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 08:03:48,697 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2022-11-19 08:03:48,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:03:48,893 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-11-19 08:03:48,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:48,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1064725833, now seen corresponding path program 1 times [2022-11-19 08:03:48,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:03:48,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860862078] [2022-11-19 08:03:48,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:48,894 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:03:48,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:03:48,895 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:03:48,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-19 08:03:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:49,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:03:49,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:03:49,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:03:49,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:03:49,549 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:03:49,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860862078] [2022-11-19 08:03:49,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860862078] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:03:49,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [639229735] [2022-11-19 08:03:49,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:49,550 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:03:49,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:03:49,554 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:03:49,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-19 08:03:50,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:50,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:03:50,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:50,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:03:50,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:03:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:03:50,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [639229735] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:03:50,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684412553] [2022-11-19 08:03:50,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:50,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:50,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:50,546 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:03:50,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 08:03:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:50,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:03:50,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:51,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:03:51,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:03:51,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684412553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:51,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-19 08:03:51,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5, 5, 5, 5] total 9 [2022-11-19 08:03:51,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52376594] [2022-11-19 08:03:51,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:51,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:03:51,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:03:51,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:03:51,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:03:51,192 INFO L87 Difference]: Start difference. First operand 1205 states and 1653 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 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) [2022-11-19 08:03:52,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:52,757 INFO L93 Difference]: Finished difference Result 1413 states and 1746 transitions. [2022-11-19 08:03:52,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:03:52,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 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 19 [2022-11-19 08:03:52,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:52,763 INFO L225 Difference]: With dead ends: 1413 [2022-11-19 08:03:52,763 INFO L226 Difference]: Without dead ends: 1413 [2022-11-19 08:03:52,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:03:52,765 INFO L413 NwaCegarLoop]: 740 mSDtfsCounter, 643 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:52,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 1282 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-19 08:03:52,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2022-11-19 08:03:52,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1203. [2022-11-19 08:03:52,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 738 states have (on average 1.7289972899728998) internal successors, (1276), 960 states have internal predecessors, (1276), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2022-11-19 08:03:52,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1644 transitions. [2022-11-19 08:03:52,802 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1644 transitions. Word has length 19 [2022-11-19 08:03:52,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:52,803 INFO L495 AbstractCegarLoop]: Abstraction has 1203 states and 1644 transitions. [2022-11-19 08:03:52,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 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) [2022-11-19 08:03:52,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1644 transitions. [2022-11-19 08:03:52,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 08:03:52,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:52,804 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:52,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2022-11-19 08:03:53,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 08:03:53,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-19 08:03:53,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:03:53,418 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-11-19 08:03:53,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:03:53,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1064725834, now seen corresponding path program 1 times [2022-11-19 08:03:53,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:03:53,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2127418293] [2022-11-19 08:03:53,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:53,420 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:03:53,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:03:53,421 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:03:53,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-19 08:03:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:53,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:03:53,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:03:53,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:03:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:03:54,046 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:03:54,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2127418293] [2022-11-19 08:03:54,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2127418293] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:03:54,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [718852771] [2022-11-19 08:03:54,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:54,047 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:03:54,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:03:54,049 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:03:54,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-19 08:03:55,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:55,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:03:55,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:55,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:03:55,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:03:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:03:55,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [718852771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:03:55,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521412506] [2022-11-19 08:03:55,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:03:55,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:03:55,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:03:55,107 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:03:55,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 08:03:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:03:55,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 08:03:55,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:03:55,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 08:03:55,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:03:55,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521412506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:03:55,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-19 08:03:55,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 5, 5, 5] total 10 [2022-11-19 08:03:55,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176153498] [2022-11-19 08:03:55,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:03:55,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:03:55,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:03:55,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:03:55,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:03:55,830 INFO L87 Difference]: Start difference. First operand 1203 states and 1644 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) [2022-11-19 08:03:57,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:03:59,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:03:59,684 INFO L93 Difference]: Finished difference Result 1259 states and 1656 transitions. [2022-11-19 08:03:59,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:03:59,685 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 19 [2022-11-19 08:03:59,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:03:59,690 INFO L225 Difference]: With dead ends: 1259 [2022-11-19 08:03:59,690 INFO L226 Difference]: Without dead ends: 1259 [2022-11-19 08:03:59,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:03:59,691 INFO L413 NwaCegarLoop]: 830 mSDtfsCounter, 239 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:03:59,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 1492 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 406 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2022-11-19 08:03:59,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-11-19 08:03:59,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 1201. [2022-11-19 08:03:59,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 738 states have (on average 1.7262872628726287) internal successors, (1274), 958 states have internal predecessors, (1274), 184 states have call successors, (184), 79 states have call predecessors, (184), 79 states have return successors, (184), 176 states have call predecessors, (184), 184 states have call successors, (184) [2022-11-19 08:03:59,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1642 transitions. [2022-11-19 08:03:59,721 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1642 transitions. Word has length 19 [2022-11-19 08:03:59,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:03:59,721 INFO L495 AbstractCegarLoop]: Abstraction has 1201 states and 1642 transitions. [2022-11-19 08:03:59,722 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) [2022-11-19 08:03:59,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1642 transitions. [2022-11-19 08:03:59,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 08:03:59,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:03:59,723 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:03:59,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-19 08:03:59,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 08:04:00,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-19 08:04:00,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:04:00,331 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-11-19 08:04:00,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:04:00,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1407192417, now seen corresponding path program 2 times [2022-11-19 08:04:00,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:04:00,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385426052] [2022-11-19 08:04:00,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:04:00,332 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:04:00,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:04:00,334 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:04:00,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-19 08:04:01,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:04:01,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:04:01,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 08:04:01,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:04:01,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:02,513 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:04:02,514 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:04:02,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385426052] [2022-11-19 08:04:02,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [385426052] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:02,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2823333] [2022-11-19 08:04:02,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:04:02,514 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:04:02,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:04:02,515 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:04:02,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-19 08:04:04,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:04:04,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:04:04,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:04:04,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:04:04,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:06,475 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:04:06,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2823333] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:06,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771914569] [2022-11-19 08:04:06,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 08:04:06,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:04:06,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:04:06,477 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:04:06,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 08:04:35,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 08:04:35,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:04:35,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:04:35,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:04:35,865 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:04:35,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:04:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:04:36,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771914569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:04:36,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:04:36,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6, 9, 6, 8] total 22 [2022-11-19 08:04:36,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567814968] [2022-11-19 08:04:36,835 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:04:36,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 08:04:36,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:04:36,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 08:04:36,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2022-11-19 08:04:36,837 INFO L87 Difference]: Start difference. First operand 1201 states and 1642 transitions. Second operand has 23 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 23 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 08:04:38,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:40,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:42,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:44,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:46,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:48,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:50,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:04:52,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:05:44,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:05:44,664 INFO L93 Difference]: Finished difference Result 2207 states and 2625 transitions. [2022-11-19 08:05:44,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 08:05:44,665 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 23 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2022-11-19 08:05:44,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:05:44,670 INFO L225 Difference]: With dead ends: 2207 [2022-11-19 08:05:44,670 INFO L226 Difference]: Without dead ends: 2207 [2022-11-19 08:05:44,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=432, Invalid=974, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 08:05:44,671 INFO L413 NwaCegarLoop]: 807 mSDtfsCounter, 5045 mSDsluCounter, 8604 mSDsCounter, 0 mSdLazyCounter, 7186 mSolverCounterSat, 515 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5072 SdHoareTripleChecker+Valid, 9411 SdHoareTripleChecker+Invalid, 7709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 515 IncrementalHoareTripleChecker+Valid, 7186 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:05:44,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5072 Valid, 9411 Invalid, 7709 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [515 Valid, 7186 Invalid, 8 Unknown, 0 Unchecked, 62.5s Time] [2022-11-19 08:05:44,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2022-11-19 08:05:44,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1396. [2022-11-19 08:05:44,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 891 states have (on average 1.728395061728395) internal successors, (1540), 1107 states have internal predecessors, (1540), 211 states have call successors, (211), 94 states have call predecessors, (211), 94 states have return successors, (211), 208 states have call predecessors, (211), 211 states have call successors, (211) [2022-11-19 08:05:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 1962 transitions. [2022-11-19 08:05:44,710 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 1962 transitions. Word has length 23 [2022-11-19 08:05:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:05:44,710 INFO L495 AbstractCegarLoop]: Abstraction has 1396 states and 1962 transitions. [2022-11-19 08:05:44,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 23 states have internal predecessors, (62), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 08:05:44,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 1962 transitions. [2022-11-19 08:05:44,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 08:05:44,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:05:44,712 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:05:44,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2022-11-19 08:05:44,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 08:05:45,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-19 08:05:45,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:05:45,323 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-11-19 08:05:45,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:05:45,324 INFO L85 PathProgramCache]: Analyzing trace with hash -738162529, now seen corresponding path program 3 times [2022-11-19 08:05:45,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:05:45,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1817219645] [2022-11-19 08:05:45,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:05:45,324 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:05:45,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:05:45,325 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:05:45,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-19 08:05:46,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-19 08:05:46,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:05:46,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 08:05:46,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:47,688 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:05:47,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:05:50,079 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:05:50,079 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:05:50,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1817219645] [2022-11-19 08:05:50,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1817219645] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:05:50,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [693726802] [2022-11-19 08:05:50,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:05:50,080 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:05:50,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:05:50,092 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:05:50,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-19 08:05:53,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-19 08:05:53,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:05:53,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 08:05:53,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:05:54,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-19 08:05:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:05:54,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:06:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:06:01,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [693726802] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:06:01,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226241921] [2022-11-19 08:06:01,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 08:06:01,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:06:01,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:06:01,336 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:06:01,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 08:10:29,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-19 08:10:29,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 08:10:29,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 08:10:29,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:10:30,251 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:30,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:10:40,721 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:10:40,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226241921] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:10:40,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 08:10:40,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14, 19, 13, 18] total 59 [2022-11-19 08:10:40,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317249129] [2022-11-19 08:10:40,722 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 08:10:40,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-19 08:10:40,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:10:40,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-19 08:10:40,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=629, Invalid=2793, Unknown=0, NotChecked=0, Total=3422 [2022-11-19 08:10:40,725 INFO L87 Difference]: Start difference. First operand 1396 states and 1962 transitions. Second operand has 59 states, 59 states have (on average 2.4237288135593222) internal successors, (143), 59 states have internal predecessors, (143), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:10:42,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:10:44,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:10:46,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:10:48,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:10:50,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:10:52,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:10:54,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:10:56,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:10:58,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:13:43,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:43,992 INFO L93 Difference]: Finished difference Result 2499 states and 3005 transitions. [2022-11-19 08:13:43,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 08:13:43,993 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.4237288135593222) internal successors, (143), 59 states have internal predecessors, (143), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-11-19 08:13:43,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:44,004 INFO L225 Difference]: With dead ends: 2499 [2022-11-19 08:13:44,005 INFO L226 Difference]: Without dead ends: 2499 [2022-11-19 08:13:44,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 32.2s TimeCoverageRelationStatistics Valid=839, Invalid=3451, Unknown=0, NotChecked=0, Total=4290 [2022-11-19 08:13:44,010 INFO L413 NwaCegarLoop]: 795 mSDtfsCounter, 15059 mSDsluCounter, 17291 mSDsCounter, 0 mSdLazyCounter, 13498 mSolverCounterSat, 1353 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 154.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15071 SdHoareTripleChecker+Valid, 18086 SdHoareTripleChecker+Invalid, 14860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1353 IncrementalHoareTripleChecker+Valid, 13498 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 165.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:44,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15071 Valid, 18086 Invalid, 14860 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1353 Valid, 13498 Invalid, 9 Unknown, 0 Unchecked, 165.2s Time] [2022-11-19 08:13:44,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2022-11-19 08:13:44,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 1394. [2022-11-19 08:13:44,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 890 states have (on average 1.7213483146067416) internal successors, (1532), 1105 states have internal predecessors, (1532), 211 states have call successors, (211), 94 states have call predecessors, (211), 94 states have return successors, (211), 208 states have call predecessors, (211), 211 states have call successors, (211) [2022-11-19 08:13:44,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 1954 transitions. [2022-11-19 08:13:44,059 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 1954 transitions. Word has length 41 [2022-11-19 08:13:44,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:44,062 INFO L495 AbstractCegarLoop]: Abstraction has 1394 states and 1954 transitions. [2022-11-19 08:13:44,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.4237288135593222) internal successors, (143), 59 states have internal predecessors, (143), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:13:44,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 1954 transitions. [2022-11-19 08:13:44,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 08:13:44,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:44,074 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:44,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:44,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:44,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-19 08:13:44,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -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_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:13:44,688 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-11-19 08:13:44,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:44,689 INFO L85 PathProgramCache]: Analyzing trace with hash 2020825701, now seen corresponding path program 1 times [2022-11-19 08:13:44,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:13:44,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473518475] [2022-11-19 08:13:44,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:44,690 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:13:44,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:13:44,691 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:13:44,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-19 08:13:45,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:45,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:13:45,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:45,723 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-19 08:13:45,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:13:45,724 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:13:45,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473518475] [2022-11-19 08:13:45,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473518475] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:13:45,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:13:45,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:13:45,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398298332] [2022-11-19 08:13:45,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:13:45,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:13:45,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:13:45,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:13:45,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:13:45,726 INFO L87 Difference]: Start difference. First operand 1394 states and 1954 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:13:45,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:45,777 INFO L93 Difference]: Finished difference Result 1394 states and 1953 transitions. [2022-11-19 08:13:45,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:13:45,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 67 [2022-11-19 08:13:45,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:45,785 INFO L225 Difference]: With dead ends: 1394 [2022-11-19 08:13:45,785 INFO L226 Difference]: Without dead ends: 1394 [2022-11-19 08:13:45,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:13:45,787 INFO L413 NwaCegarLoop]: 785 mSDtfsCounter, 750 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:45,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [750 Valid, 785 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:13:45,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2022-11-19 08:13:45,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1394. [2022-11-19 08:13:45,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 890 states have (on average 1.7202247191011235) internal successors, (1531), 1105 states have internal predecessors, (1531), 211 states have call successors, (211), 94 states have call predecessors, (211), 94 states have return successors, (211), 208 states have call predecessors, (211), 211 states have call successors, (211) [2022-11-19 08:13:45,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 1953 transitions. [2022-11-19 08:13:45,823 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 1953 transitions. Word has length 67 [2022-11-19 08:13:45,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:45,826 INFO L495 AbstractCegarLoop]: Abstraction has 1394 states and 1953 transitions. [2022-11-19 08:13:45,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:13:45,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 1953 transitions. [2022-11-19 08:13:45,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 08:13:45,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:45,829 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:45,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:46,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:13:46,048 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-11-19 08:13:46,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:46,049 INFO L85 PathProgramCache]: Analyzing trace with hash 2020823779, now seen corresponding path program 1 times [2022-11-19 08:13:46,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:13:46,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884619273] [2022-11-19 08:13:46,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:46,051 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:13:46,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:13:46,052 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:13:46,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-19 08:13:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:47,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:13:47,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:47,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-19 08:13:47,040 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-19 08:13:47,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:13:47,040 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:13:47,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884619273] [2022-11-19 08:13:47,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884619273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:13:47,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:13:47,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:13:47,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519854051] [2022-11-19 08:13:47,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:13:47,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:13:47,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:13:47,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:13:47,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:13:47,043 INFO L87 Difference]: Start difference. First operand 1394 states and 1953 transitions. Second operand has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:13:49,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:13:50,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:50,084 INFO L93 Difference]: Finished difference Result 1393 states and 1952 transitions. [2022-11-19 08:13:50,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:13:50,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 67 [2022-11-19 08:13:50,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:50,093 INFO L225 Difference]: With dead ends: 1393 [2022-11-19 08:13:50,093 INFO L226 Difference]: Without dead ends: 1393 [2022-11-19 08:13:50,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:13:50,094 INFO L413 NwaCegarLoop]: 783 mSDtfsCounter, 2 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:50,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1355 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2022-11-19 08:13:50,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2022-11-19 08:13:50,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1393. [2022-11-19 08:13:50,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 890 states have (on average 1.7191011235955056) internal successors, (1530), 1104 states have internal predecessors, (1530), 211 states have call successors, (211), 94 states have call predecessors, (211), 94 states have return successors, (211), 208 states have call predecessors, (211), 211 states have call successors, (211) [2022-11-19 08:13:50,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 1952 transitions. [2022-11-19 08:13:50,125 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 1952 transitions. Word has length 67 [2022-11-19 08:13:50,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:50,126 INFO L495 AbstractCegarLoop]: Abstraction has 1393 states and 1952 transitions. [2022-11-19 08:13:50,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:13:50,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 1952 transitions. [2022-11-19 08:13:50,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 08:13:50,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:50,127 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:50,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:50,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:13:50,335 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-11-19 08:13:50,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:50,336 INFO L85 PathProgramCache]: Analyzing trace with hash 2020823780, now seen corresponding path program 1 times [2022-11-19 08:13:50,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:13:50,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131691330] [2022-11-19 08:13:50,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:50,355 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:13:50,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:13:50,356 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:13:50,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-19 08:13:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:51,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 08:13:51,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:51,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:13:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-19 08:13:51,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:13:51,474 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:13:51,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131691330] [2022-11-19 08:13:51,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131691330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:13:51,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:13:51,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:13:51,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256305120] [2022-11-19 08:13:51,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:13:51,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:13:51,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:13:51,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:13:51,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:13:51,476 INFO L87 Difference]: Start difference. First operand 1393 states and 1952 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:13:53,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:13:54,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:54,957 INFO L93 Difference]: Finished difference Result 1392 states and 1951 transitions. [2022-11-19 08:13:54,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:13:54,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 67 [2022-11-19 08:13:54,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:54,964 INFO L225 Difference]: With dead ends: 1392 [2022-11-19 08:13:54,965 INFO L226 Difference]: Without dead ends: 1392 [2022-11-19 08:13:54,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:13:54,966 INFO L413 NwaCegarLoop]: 780 mSDtfsCounter, 747 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 1356 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:54,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 1356 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 210 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2022-11-19 08:13:54,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1392 states. [2022-11-19 08:13:54,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1392 to 1392. [2022-11-19 08:13:54,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 890 states have (on average 1.7179775280898877) internal successors, (1529), 1103 states have internal predecessors, (1529), 211 states have call successors, (211), 94 states have call predecessors, (211), 94 states have return successors, (211), 208 states have call predecessors, (211), 211 states have call successors, (211) [2022-11-19 08:13:55,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 1951 transitions. [2022-11-19 08:13:55,002 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 1951 transitions. Word has length 67 [2022-11-19 08:13:55,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:55,003 INFO L495 AbstractCegarLoop]: Abstraction has 1392 states and 1951 transitions. [2022-11-19 08:13:55,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:13:55,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 1951 transitions. [2022-11-19 08:13:55,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 08:13:55,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:55,004 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:55,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:55,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:13:55,219 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr164ASSERT_VIOLATIONMEMORY_LEAK === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-11-19 08:13:55,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:55,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1355687384, now seen corresponding path program 1 times [2022-11-19 08:13:55,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:13:55,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815501375] [2022-11-19 08:13:55,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:55,222 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:13:55,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:13:55,223 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:13:55,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-19 08:13:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:13:56,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 08:13:56,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:13:56,282 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-11-19 08:13:56,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:13:56,282 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:13:56,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815501375] [2022-11-19 08:13:56,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815501375] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:13:56,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:13:56,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:13:56,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181557440] [2022-11-19 08:13:56,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:13:56,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:13:56,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:13:56,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:13:56,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:13:56,284 INFO L87 Difference]: Start difference. First operand 1392 states and 1951 transitions. Second operand has 3 states, 2 states have (on average 17.5) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 08:13:58,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:13:59,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:13:59,633 INFO L93 Difference]: Finished difference Result 1433 states and 1960 transitions. [2022-11-19 08:13:59,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:13:59,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 17.5) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 74 [2022-11-19 08:13:59,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:13:59,639 INFO L225 Difference]: With dead ends: 1433 [2022-11-19 08:13:59,639 INFO L226 Difference]: Without dead ends: 1421 [2022-11-19 08:13:59,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:13:59,640 INFO L413 NwaCegarLoop]: 772 mSDtfsCounter, 93 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:13:59,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 1317 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 258 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-11-19 08:13:59,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2022-11-19 08:13:59,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1388. [2022-11-19 08:13:59,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 888 states have (on average 1.7184684684684686) internal successors, (1526), 1101 states have internal predecessors, (1526), 210 states have call successors, (210), 94 states have call predecessors, (210), 93 states have return successors, (208), 206 states have call predecessors, (208), 208 states have call successors, (208) [2022-11-19 08:13:59,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 1944 transitions. [2022-11-19 08:13:59,682 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 1944 transitions. Word has length 74 [2022-11-19 08:13:59,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:13:59,682 INFO L495 AbstractCegarLoop]: Abstraction has 1388 states and 1944 transitions. [2022-11-19 08:13:59,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 17.5) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 08:13:59,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 1944 transitions. [2022-11-19 08:13:59,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-19 08:13:59,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:13:59,684 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:13:59,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-19 08:13:59,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:13:59,899 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-11-19 08:13:59,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:13:59,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1244150361, now seen corresponding path program 1 times [2022-11-19 08:13:59,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:13:59,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247639605] [2022-11-19 08:13:59,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:13:59,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:13:59,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:13:59,902 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:13:59,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-19 08:14:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:01,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:14:01,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:02,075 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:14:02,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 08:14:02,177 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 [2022-11-19 08:14:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-11-19 08:14:02,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:02,415 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:14:02,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247639605] [2022-11-19 08:14:02,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247639605] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:14:02,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [438976458] [2022-11-19 08:14:02,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:02,416 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:14:02,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:14:02,418 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:14:02,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-19 08:14:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:05,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:14:05,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:06,120 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-19 08:14:06,120 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 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-19 08:14:06,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 32 [2022-11-19 08:14:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-11-19 08:14:06,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:06,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [438976458] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:14:06,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428043789] [2022-11-19 08:14:06,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:06,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:06,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:06,475 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:14:06,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-19 08:14:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:07,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:14:07,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:07,901 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:14:07,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 08:14:07,974 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 [2022-11-19 08:14:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-11-19 08:14:08,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:08,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428043789] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:14:08,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:14:08,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-19 08:14:08,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438809202] [2022-11-19 08:14:08,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:14:08,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 08:14:08,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:14:08,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 08:14:08,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:14:08,092 INFO L87 Difference]: Start difference. First operand 1388 states and 1944 transitions. Second operand has 10 states, 9 states have (on average 8.0) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-19 08:14:10,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:14:12,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:14:14,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:14:19,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:19,884 INFO L93 Difference]: Finished difference Result 1929 states and 2589 transitions. [2022-11-19 08:14:19,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:14:19,885 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.0) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 76 [2022-11-19 08:14:19,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:19,896 INFO L225 Difference]: With dead ends: 1929 [2022-11-19 08:14:19,896 INFO L226 Difference]: Without dead ends: 1929 [2022-11-19 08:14:19,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 229 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:14:19,898 INFO L413 NwaCegarLoop]: 704 mSDtfsCounter, 753 mSDsluCounter, 3046 mSDsCounter, 0 mSdLazyCounter, 2097 mSolverCounterSat, 5 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 3750 SdHoareTripleChecker+Invalid, 2105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 2097 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:19,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 3750 Invalid, 2105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 2097 Invalid, 3 Unknown, 0 Unchecked, 11.6s Time] [2022-11-19 08:14:19,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2022-11-19 08:14:19,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1696. [2022-11-19 08:14:19,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1116 states have (on average 1.7410394265232976) internal successors, (1943), 1341 states have internal predecessors, (1943), 268 states have call successors, (268), 116 states have call predecessors, (268), 115 states have return successors, (266), 257 states have call predecessors, (266), 266 states have call successors, (266) [2022-11-19 08:14:19,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2477 transitions. [2022-11-19 08:14:19,946 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2477 transitions. Word has length 76 [2022-11-19 08:14:19,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:19,947 INFO L495 AbstractCegarLoop]: Abstraction has 1696 states and 2477 transitions. [2022-11-19 08:14:19,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.0) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-19 08:14:19,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2477 transitions. [2022-11-19 08:14:19,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-19 08:14:19,948 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:19,948 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:19,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:20,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:20,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:20,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:20,563 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-11-19 08:14:20,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:20,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1244150360, now seen corresponding path program 1 times [2022-11-19 08:14:20,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:14:20,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1241378515] [2022-11-19 08:14:20,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:20,564 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:20,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:14:20,565 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:14:20,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-19 08:14:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:22,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:14:22,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:23,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:23,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:14:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-19 08:14:23,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:26,041 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:14:26,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1241378515] [2022-11-19 08:14:26,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1241378515] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:14:26,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1826106383] [2022-11-19 08:14:26,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:26,042 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:14:26,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:14:26,044 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:14:26,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-19 08:14:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:29,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:14:29,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:30,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:30,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:14:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-19 08:14:30,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:30,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1826106383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:14:30,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754073063] [2022-11-19 08:14:30,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:30,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:30,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:30,718 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:14:30,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-19 08:14:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:31,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:14:31,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:32,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:14:32,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:14:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-19 08:14:32,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:35,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754073063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:14:35,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:14:35,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-19 08:14:35,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763477482] [2022-11-19 08:14:35,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:14:35,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:14:35,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:14:35,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:14:35,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2022-11-19 08:14:35,075 INFO L87 Difference]: Start difference. First operand 1696 states and 2477 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 08:14:37,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:14:39,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:14:44,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:44,945 INFO L93 Difference]: Finished difference Result 2119 states and 2802 transitions. [2022-11-19 08:14:44,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:14:44,945 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 76 [2022-11-19 08:14:44,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:44,954 INFO L225 Difference]: With dead ends: 2119 [2022-11-19 08:14:44,954 INFO L226 Difference]: Without dead ends: 2119 [2022-11-19 08:14:44,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=50, Invalid=105, Unknown=1, NotChecked=0, Total=156 [2022-11-19 08:14:44,955 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 994 mSDsluCounter, 1676 mSDsCounter, 0 mSdLazyCounter, 1905 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 2296 SdHoareTripleChecker+Invalid, 1923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1905 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:44,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 2296 Invalid, 1923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1905 Invalid, 2 Unknown, 0 Unchecked, 9.7s Time] [2022-11-19 08:14:44,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2022-11-19 08:14:45,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1696. [2022-11-19 08:14:45,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1116 states have (on average 1.739247311827957) internal successors, (1941), 1341 states have internal predecessors, (1941), 268 states have call successors, (268), 116 states have call predecessors, (268), 115 states have return successors, (266), 257 states have call predecessors, (266), 266 states have call successors, (266) [2022-11-19 08:14:45,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2475 transitions. [2022-11-19 08:14:45,012 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2475 transitions. Word has length 76 [2022-11-19 08:14:45,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:45,013 INFO L495 AbstractCegarLoop]: Abstraction has 1696 states and 2475 transitions. [2022-11-19 08:14:45,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 08:14:45,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2475 transitions. [2022-11-19 08:14:45,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-19 08:14:45,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:45,014 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:45,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:45,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:45,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:45,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:14:45,628 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr114REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-11-19 08:14:45,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:45,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1356949500, now seen corresponding path program 1 times [2022-11-19 08:14:45,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:14:45,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1576856197] [2022-11-19 08:14:45,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:45,630 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:45,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:14:45,631 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:14:45,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-19 08:14:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:46,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:14:46,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-11-19 08:14:46,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:14:46,656 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:14:46,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1576856197] [2022-11-19 08:14:46,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1576856197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:14:46,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:14:46,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:14:46,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289290870] [2022-11-19 08:14:46,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:14:46,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:14:46,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:14:46,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:14:46,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:14:46,658 INFO L87 Difference]: Start difference. First operand 1696 states and 2475 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 08:14:46,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:14:46,759 INFO L93 Difference]: Finished difference Result 1336 states and 1884 transitions. [2022-11-19 08:14:46,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:14:46,759 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 81 [2022-11-19 08:14:46,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:14:46,767 INFO L225 Difference]: With dead ends: 1336 [2022-11-19 08:14:46,767 INFO L226 Difference]: Without dead ends: 1331 [2022-11-19 08:14:46,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:14:46,770 INFO L413 NwaCegarLoop]: 785 mSDtfsCounter, 3 mSDsluCounter, 2343 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3128 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:14:46,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3128 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:14:46,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2022-11-19 08:14:46,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1331. [2022-11-19 08:14:46,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 857 states have (on average 1.7432905484247374) internal successors, (1494), 1069 states have internal predecessors, (1494), 192 states have call successors, (192), 85 states have call predecessors, (192), 85 states have return successors, (192), 189 states have call predecessors, (192), 192 states have call successors, (192) [2022-11-19 08:14:46,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 1878 transitions. [2022-11-19 08:14:46,853 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 1878 transitions. Word has length 81 [2022-11-19 08:14:46,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:14:46,853 INFO L495 AbstractCegarLoop]: Abstraction has 1331 states and 1878 transitions. [2022-11-19 08:14:46,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 08:14:46,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 1878 transitions. [2022-11-19 08:14:46,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-19 08:14:46,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:14:46,855 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:14:46,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-11-19 08:14:47,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:47,073 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-11-19 08:14:47,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:14:47,073 INFO L85 PathProgramCache]: Analyzing trace with hash 986823980, now seen corresponding path program 1 times [2022-11-19 08:14:47,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:14:47,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1203145860] [2022-11-19 08:14:47,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:47,075 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:14:47,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:14:47,076 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:14:47,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-19 08:14:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:48,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:14:48,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:48,664 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:14:48,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 08:14:48,749 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 [2022-11-19 08:14:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-19 08:14:48,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:48,982 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:14:48,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1203145860] [2022-11-19 08:14:48,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1203145860] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:14:48,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1073986426] [2022-11-19 08:14:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:48,983 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:14:48,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:14:48,984 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:14:48,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-19 08:14:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:51,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:14:51,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:52,566 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-19 08:14:52,566 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 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-19 08:14:52,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 32 [2022-11-19 08:14:52,913 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-19 08:14:52,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:53,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1073986426] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:14:53,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218897940] [2022-11-19 08:14:53,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:14:53,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:14:53,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:14:53,012 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:14:53,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-19 08:14:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:14:54,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:14:54,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:14:54,639 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:14:54,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 08:14:54,712 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 [2022-11-19 08:14:54,788 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-11-19 08:14:54,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:14:54,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218897940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:14:54,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:14:54,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-19 08:14:54,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6463754] [2022-11-19 08:14:54,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:14:54,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 08:14:54,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:14:54,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 08:14:54,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-11-19 08:14:54,878 INFO L87 Difference]: Start difference. First operand 1331 states and 1878 transitions. Second operand has 10 states, 9 states have (on average 8.0) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-19 08:14:56,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:14:58,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:15:00,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:15:02,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:15:04,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:15:10,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:10,946 INFO L93 Difference]: Finished difference Result 1506 states and 1890 transitions. [2022-11-19 08:15:10,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:15:10,947 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.0) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 82 [2022-11-19 08:15:10,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:10,953 INFO L225 Difference]: With dead ends: 1506 [2022-11-19 08:15:10,953 INFO L226 Difference]: Without dead ends: 1506 [2022-11-19 08:15:10,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 265 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-11-19 08:15:10,954 INFO L413 NwaCegarLoop]: 700 mSDtfsCounter, 737 mSDsluCounter, 3563 mSDsCounter, 0 mSdLazyCounter, 2455 mSolverCounterSat, 5 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 4263 SdHoareTripleChecker+Invalid, 2465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 2455 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:10,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 4263 Invalid, 2465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 2455 Invalid, 5 Unknown, 0 Unchecked, 15.9s Time] [2022-11-19 08:15:10,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-11-19 08:15:10,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1329. [2022-11-19 08:15:10,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1329 states, 857 states have (on average 1.7409568261376895) internal successors, (1492), 1067 states have internal predecessors, (1492), 192 states have call successors, (192), 85 states have call predecessors, (192), 85 states have return successors, (192), 189 states have call predecessors, (192), 192 states have call successors, (192) [2022-11-19 08:15:10,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1329 states to 1329 states and 1876 transitions. [2022-11-19 08:15:11,000 INFO L78 Accepts]: Start accepts. Automaton has 1329 states and 1876 transitions. Word has length 82 [2022-11-19 08:15:11,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:11,000 INFO L495 AbstractCegarLoop]: Abstraction has 1329 states and 1876 transitions. [2022-11-19 08:15:11,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.0) internal successors, (72), 7 states have internal predecessors, (72), 4 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-19 08:15:11,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1329 states and 1876 transitions. [2022-11-19 08:15:11,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-19 08:15:11,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:11,002 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:11,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:11,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:11,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:11,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:15:11,618 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-11-19 08:15:11,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:11,618 INFO L85 PathProgramCache]: Analyzing trace with hash 986823981, now seen corresponding path program 1 times [2022-11-19 08:15:11,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:15:11,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223288136] [2022-11-19 08:15:11,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:11,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:15:11,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:15:11,620 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:15:11,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-19 08:15:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:13,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:15:13,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:14,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:15:14,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:15:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-19 08:15:14,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:15:14,953 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:15:14,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223288136] [2022-11-19 08:15:14,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [223288136] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:14,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1005251085] [2022-11-19 08:15:14,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:14,953 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:15:14,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:15:14,954 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:15:14,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2022-11-19 08:15:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:18,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:15:18,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:19,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:15:19,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:15:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-19 08:15:19,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:15:19,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1005251085] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:19,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38262908] [2022-11-19 08:15:19,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:19,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:19,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:19,724 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:19,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-19 08:15:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:20,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:15:20,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:21,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:15:21,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:15:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-19 08:15:21,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:15:24,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38262908] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:24,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:15:24,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-11-19 08:15:24,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807466419] [2022-11-19 08:15:24,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:15:24,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:15:24,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:15:24,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:15:24,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:15:24,098 INFO L87 Difference]: Start difference. First operand 1329 states and 1876 transitions. Second operand has 6 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 08:15:26,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:15:28,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:15:34,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:34,505 INFO L93 Difference]: Finished difference Result 1573 states and 1902 transitions. [2022-11-19 08:15:34,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:15:34,506 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 82 [2022-11-19 08:15:34,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:34,511 INFO L225 Difference]: With dead ends: 1573 [2022-11-19 08:15:34,511 INFO L226 Difference]: Without dead ends: 1573 [2022-11-19 08:15:34,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 296 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:15:34,512 INFO L413 NwaCegarLoop]: 616 mSDtfsCounter, 979 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 1893 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 2290 SdHoareTripleChecker+Invalid, 1911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1893 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:34,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [979 Valid, 2290 Invalid, 1911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1893 Invalid, 2 Unknown, 0 Unchecked, 10.2s Time] [2022-11-19 08:15:34,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2022-11-19 08:15:34,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 1327. [2022-11-19 08:15:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 857 states have (on average 1.7386231038506417) internal successors, (1490), 1065 states have internal predecessors, (1490), 192 states have call successors, (192), 85 states have call predecessors, (192), 85 states have return successors, (192), 189 states have call predecessors, (192), 192 states have call successors, (192) [2022-11-19 08:15:34,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 1874 transitions. [2022-11-19 08:15:34,541 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 1874 transitions. Word has length 82 [2022-11-19 08:15:34,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:34,541 INFO L495 AbstractCegarLoop]: Abstraction has 1327 states and 1874 transitions. [2022-11-19 08:15:34,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-19 08:15:34,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 1874 transitions. [2022-11-19 08:15:34,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-19 08:15:34,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:34,543 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:34,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2022-11-19 08:15:34,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:34,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:35,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:35,164 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-11-19 08:15:35,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:35,164 INFO L85 PathProgramCache]: Analyzing trace with hash -3613151, now seen corresponding path program 1 times [2022-11-19 08:15:35,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:15:35,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141419830] [2022-11-19 08:15:35,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:35,165 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:15:35,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:15:35,166 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:15:35,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-19 08:15:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:37,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 08:15:37,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:37,650 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:15:37,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 08:15:37,731 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 [2022-11-19 08:15:37,838 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-11-19 08:15:37,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:15:37,838 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:15:37,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141419830] [2022-11-19 08:15:37,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141419830] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:15:37,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:15:37,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:15:37,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166390958] [2022-11-19 08:15:37,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:15:37,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:15:37,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:15:37,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:15:37,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:15:37,840 INFO L87 Difference]: Start difference. First operand 1327 states and 1874 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:15:39,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:15:42,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:15:42,445 INFO L93 Difference]: Finished difference Result 1502 states and 1886 transitions. [2022-11-19 08:15:42,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:15:42,446 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2022-11-19 08:15:42,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:15:42,451 INFO L225 Difference]: With dead ends: 1502 [2022-11-19 08:15:42,451 INFO L226 Difference]: Without dead ends: 1502 [2022-11-19 08:15:42,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:15:42,452 INFO L413 NwaCegarLoop]: 698 mSDtfsCounter, 719 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 1571 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:15:42,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [719 Valid, 1571 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 733 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2022-11-19 08:15:42,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2022-11-19 08:15:42,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1325. [2022-11-19 08:15:42,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 857 states have (on average 1.736289381563594) internal successors, (1488), 1063 states have internal predecessors, (1488), 192 states have call successors, (192), 85 states have call predecessors, (192), 85 states have return successors, (192), 189 states have call predecessors, (192), 192 states have call successors, (192) [2022-11-19 08:15:42,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 1872 transitions. [2022-11-19 08:15:42,479 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 1872 transitions. Word has length 88 [2022-11-19 08:15:42,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:15:42,480 INFO L495 AbstractCegarLoop]: Abstraction has 1325 states and 1872 transitions. [2022-11-19 08:15:42,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:15:42,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 1872 transitions. [2022-11-19 08:15:42,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-19 08:15:42,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:15:42,481 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:15:42,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2022-11-19 08:15:42,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:15:42,695 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-11-19 08:15:42,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:15:42,696 INFO L85 PathProgramCache]: Analyzing trace with hash -3613150, now seen corresponding path program 1 times [2022-11-19 08:15:42,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:15:42,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1891060996] [2022-11-19 08:15:42,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:42,697 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:15:42,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:15:42,698 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:15:42,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-19 08:15:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:44,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:15:44,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:45,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:15:45,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:15:46,107 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-19 08:15:46,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:15:46,769 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:15:46,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1891060996] [2022-11-19 08:15:46,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1891060996] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:46,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1861192570] [2022-11-19 08:15:46,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:46,769 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:15:46,769 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:15:46,771 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:15:46,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-19 08:15:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:50,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:15:50,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:51,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:15:51,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:15:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-19 08:15:51,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:15:56,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1861192570] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:15:56,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668833001] [2022-11-19 08:15:56,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:15:56,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:15:56,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:15:56,448 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:15:56,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-19 08:15:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:15:57,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 922 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 08:15:57,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:15:58,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:15:58,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:15:59,180 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-19 08:15:59,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:16:01,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668833001] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:16:01,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:16:01,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-11-19 08:16:01,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501408374] [2022-11-19 08:16:01,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:16:01,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:16:01,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:16:01,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:16:01,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:16:01,669 INFO L87 Difference]: Start difference. First operand 1325 states and 1872 transitions. Second operand has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:16:03,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:16:07,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:16:07,054 INFO L93 Difference]: Finished difference Result 1376 states and 1879 transitions. [2022-11-19 08:16:07,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:16:07,055 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 88 [2022-11-19 08:16:07,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:16:07,059 INFO L225 Difference]: With dead ends: 1376 [2022-11-19 08:16:07,060 INFO L226 Difference]: Without dead ends: 1376 [2022-11-19 08:16:07,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 334 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:16:07,061 INFO L413 NwaCegarLoop]: 761 mSDtfsCounter, 149 mSDsluCounter, 1530 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 2291 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:16:07,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 2291 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 867 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2022-11-19 08:16:07,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2022-11-19 08:16:07,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1323. [2022-11-19 08:16:07,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 857 states have (on average 1.7327887981330221) internal successors, (1485), 1061 states have internal predecessors, (1485), 192 states have call successors, (192), 85 states have call predecessors, (192), 85 states have return successors, (192), 189 states have call predecessors, (192), 192 states have call successors, (192) [2022-11-19 08:16:07,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 1869 transitions. [2022-11-19 08:16:07,111 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 1869 transitions. Word has length 88 [2022-11-19 08:16:07,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:16:07,111 INFO L495 AbstractCegarLoop]: Abstraction has 1323 states and 1869 transitions. [2022-11-19 08:16:07,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:16:07,112 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 1869 transitions. [2022-11-19 08:16:07,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-19 08:16:07,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:16:07,113 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:16:07,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-19 08:16:07,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-19 08:16:07,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-19 08:16:07,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:16:07,728 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-11-19 08:16:07,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:16:07,728 INFO L85 PathProgramCache]: Analyzing trace with hash -112007323, now seen corresponding path program 1 times [2022-11-19 08:16:07,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:16:07,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926549149] [2022-11-19 08:16:07,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:16:07,730 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:16:07,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:16:07,731 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:16:07,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-19 08:16:09,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:16:09,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 08:16:09,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:16:10,027 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 08:16:10,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-19 08:16:10,104 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 [2022-11-19 08:16:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-11-19 08:16:10,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:16:10,219 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:16:10,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926549149] [2022-11-19 08:16:10,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926549149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:16:10,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:16:10,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:16:10,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633564227] [2022-11-19 08:16:10,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:16:10,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:16:10,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:16:10,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:16:10,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:16:10,221 INFO L87 Difference]: Start difference. First operand 1323 states and 1869 transitions. Second operand has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:16:12,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:16:14,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:16:17,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:16:17,869 INFO L93 Difference]: Finished difference Result 1498 states and 1881 transitions. [2022-11-19 08:16:17,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:16:17,870 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 89 [2022-11-19 08:16:17,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:16:17,875 INFO L225 Difference]: With dead ends: 1498 [2022-11-19 08:16:17,875 INFO L226 Difference]: Without dead ends: 1498 [2022-11-19 08:16:17,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:16:17,876 INFO L413 NwaCegarLoop]: 668 mSDtfsCounter, 1078 mSDsluCounter, 1457 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 59 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1078 SdHoareTripleChecker+Valid, 2125 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:16:17,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1078 Valid, 2125 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1102 Invalid, 2 Unknown, 0 Unchecked, 7.6s Time] [2022-11-19 08:16:17,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2022-11-19 08:16:17,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1321. [2022-11-19 08:16:17,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 857 states have (on average 1.7304550758459742) internal successors, (1483), 1059 states have internal predecessors, (1483), 192 states have call successors, (192), 85 states have call predecessors, (192), 85 states have return successors, (192), 189 states have call predecessors, (192), 192 states have call successors, (192) [2022-11-19 08:16:17,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1867 transitions. [2022-11-19 08:16:17,904 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1867 transitions. Word has length 89 [2022-11-19 08:16:17,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:16:17,905 INFO L495 AbstractCegarLoop]: Abstraction has 1321 states and 1867 transitions. [2022-11-19 08:16:17,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:16:17,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1867 transitions. [2022-11-19 08:16:17,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-19 08:16:17,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:16:17,907 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:16:17,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-19 08:16:18,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:16:18,131 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-11-19 08:16:18,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:16:18,131 INFO L85 PathProgramCache]: Analyzing trace with hash -112007322, now seen corresponding path program 1 times [2022-11-19 08:16:18,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:16:18,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1679971476] [2022-11-19 08:16:18,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:16:18,132 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:16:18,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:16:18,133 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:16:18,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-19 08:16:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:16:20,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:16:20,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:16:21,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:16:21,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:16:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-19 08:16:21,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:16:21,955 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:16:21,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1679971476] [2022-11-19 08:16:21,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1679971476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:16:21,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [865399546] [2022-11-19 08:16:21,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:16:21,956 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:16:21,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:16:21,957 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:16:21,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-19 08:16:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:16:25,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:16:25,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:16:26,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:16:26,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:16:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-19 08:16:26,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:16:27,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [865399546] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:16:27,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367759693] [2022-11-19 08:16:27,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:16:27,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:16:27,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:16:27,033 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:16:27,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-19 08:16:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:16:28,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 08:16:28,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:16:29,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:16:29,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:16:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-19 08:16:29,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:16:29,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367759693] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:16:29,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:16:29,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-11-19 08:16:29,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972186700] [2022-11-19 08:16:29,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:16:29,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:16:29,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:16:29,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:16:29,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:16:29,551 INFO L87 Difference]: Start difference. First operand 1321 states and 1867 transitions. Second operand has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:16:31,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:16:35,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:16:35,949 INFO L93 Difference]: Finished difference Result 1565 states and 1893 transitions. [2022-11-19 08:16:35,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:16:35,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 89 [2022-11-19 08:16:35,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:16:35,955 INFO L225 Difference]: With dead ends: 1565 [2022-11-19 08:16:35,955 INFO L226 Difference]: Without dead ends: 1565 [2022-11-19 08:16:35,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 340 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:16:35,956 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 1903 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 215 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1903 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:16:35,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1903 Valid, 1576 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1039 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2022-11-19 08:16:35,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2022-11-19 08:16:35,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1319. [2022-11-19 08:16:35,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 857 states have (on average 1.7281213535589266) internal successors, (1481), 1057 states have internal predecessors, (1481), 192 states have call successors, (192), 85 states have call predecessors, (192), 85 states have return successors, (192), 189 states have call predecessors, (192), 192 states have call successors, (192) [2022-11-19 08:16:35,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 1865 transitions. [2022-11-19 08:16:35,977 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 1865 transitions. Word has length 89 [2022-11-19 08:16:35,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:16:35,978 INFO L495 AbstractCegarLoop]: Abstraction has 1319 states and 1865 transitions. [2022-11-19 08:16:35,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 08:16:35,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 1865 transitions. [2022-11-19 08:16:35,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-19 08:16:35,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:16:35,980 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:16:35,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-19 08:16:36,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-19 08:16:36,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-11-19 08:16:36,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:16:36,595 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting cdev_addErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-11-19 08:16:36,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:16:36,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1939903835, now seen corresponding path program 1 times [2022-11-19 08:16:36,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:16:36,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1184730990] [2022-11-19 08:16:36,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:16:36,596 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 [2022-11-19 08:16:36,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:16:36,597 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:16:36,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-19 08:16:37,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:16:37,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 08:16:37,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:16:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-11-19 08:16:37,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:16:37,908 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:16:37,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1184730990] [2022-11-19 08:16:37,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1184730990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:16:37,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:16:37,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:16:37,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617611468] [2022-11-19 08:16:37,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:16:37,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:16:37,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:16:37,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:16:37,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:16:37,910 INFO L87 Difference]: Start difference. First operand 1319 states and 1865 transitions. Second operand has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 08:16:39,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:16:41,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:16:45,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:16:45,166 INFO L93 Difference]: Finished difference Result 1494 states and 1877 transitions. [2022-11-19 08:16:45,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:16:45,167 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 96 [2022-11-19 08:16:45,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:16:45,170 INFO L225 Difference]: With dead ends: 1494 [2022-11-19 08:16:45,170 INFO L226 Difference]: Without dead ends: 1494 [2022-11-19 08:16:45,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:16:45,171 INFO L413 NwaCegarLoop]: 692 mSDtfsCounter, 790 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 2188 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:16:45,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 2188 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1094 Invalid, 2 Unknown, 0 Unchecked, 7.2s Time] [2022-11-19 08:16:45,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2022-11-19 08:16:45,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1317. [2022-11-19 08:16:45,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 857 states have (on average 1.7257876312718787) internal successors, (1479), 1055 states have internal predecessors, (1479), 192 states have call successors, (192), 85 states have call predecessors, (192), 85 states have return successors, (192), 189 states have call predecessors, (192), 192 states have call successors, (192) [2022-11-19 08:16:45,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 1863 transitions. [2022-11-19 08:16:45,201 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 1863 transitions. Word has length 96 [2022-11-19 08:16:45,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:16:45,201 INFO L495 AbstractCegarLoop]: Abstraction has 1317 states and 1863 transitions. [2022-11-19 08:16:45,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-19 08:16:45,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 1863 transitions. [2022-11-19 08:16:45,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-19 08:16:45,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:16:45,203 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:16:45,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-19 08:16:45,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:16:45,419 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting cdev_addErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-11-19 08:16:45,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:16:45,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1939903834, now seen corresponding path program 1 times [2022-11-19 08:16:45,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:16:45,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945843583] [2022-11-19 08:16:45,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:16:45,421 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:16:45,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:16:45,423 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:16:45,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-19 08:16:47,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:16:47,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:16:47,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:16:49,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:16:49,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:16:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-19 08:16:49,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:16:50,493 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:16:50,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945843583] [2022-11-19 08:16:50,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945843583] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:16:50,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [108158418] [2022-11-19 08:16:50,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:16:50,494 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:16:50,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:16:50,504 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:16:50,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2022-11-19 08:16:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:16:54,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:16:54,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:16:55,474 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:16:55,475 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 12 treesize of output 18 [2022-11-19 08:16:55,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:16:56,417 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:16:56,418 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 23 [2022-11-19 08:16:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-19 08:16:56,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:16:57,112 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 12 treesize of output 10 [2022-11-19 08:17:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-11-19 08:17:00,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [108158418] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:17:00,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:17:00,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 8] total 17 [2022-11-19 08:17:00,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015953775] [2022-11-19 08:17:00,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:17:00,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 08:17:00,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:17:00,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 08:17:00,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=282, Unknown=1, NotChecked=0, Total=342 [2022-11-19 08:17:00,316 INFO L87 Difference]: Start difference. First operand 1317 states and 1863 transitions. Second operand has 9 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 08:17:02,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:17:04,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:17:06,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:17:17,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:17:17,708 INFO L93 Difference]: Finished difference Result 1369 states and 1872 transitions. [2022-11-19 08:17:17,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:17:17,709 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 96 [2022-11-19 08:17:17,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:17:17,712 INFO L225 Difference]: With dead ends: 1369 [2022-11-19 08:17:17,713 INFO L226 Difference]: Without dead ends: 1369 [2022-11-19 08:17:17,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=63, Invalid=316, Unknown=1, NotChecked=0, Total=380 [2022-11-19 08:17:17,714 INFO L413 NwaCegarLoop]: 744 mSDtfsCounter, 246 mSDsluCounter, 3047 mSDsCounter, 0 mSdLazyCounter, 1683 mSolverCounterSat, 21 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 3791 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1683 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:17:17,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 3791 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1683 Invalid, 3 Unknown, 0 Unchecked, 17.2s Time] [2022-11-19 08:17:17,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2022-11-19 08:17:17,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1316. [2022-11-19 08:17:17,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 857 states have (on average 1.7246207701283547) internal successors, (1478), 1054 states have internal predecessors, (1478), 192 states have call successors, (192), 85 states have call predecessors, (192), 85 states have return successors, (192), 189 states have call predecessors, (192), 192 states have call successors, (192) [2022-11-19 08:17:17,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 1862 transitions. [2022-11-19 08:17:17,737 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 1862 transitions. Word has length 96 [2022-11-19 08:17:17,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:17:17,738 INFO L495 AbstractCegarLoop]: Abstraction has 1316 states and 1862 transitions. [2022-11-19 08:17:17,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 08:17:17,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 1862 transitions. [2022-11-19 08:17:17,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-19 08:17:17,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:17:17,740 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:17:17,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Ended with exit code 0 [2022-11-19 08:17:17,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2022-11-19 08:17:18,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 08:17:18,156 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting cdev_addErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [spin_lock_initErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, spin_lock_initErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 202 more)] === [2022-11-19 08:17:18,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:17:18,156 INFO L85 PathProgramCache]: Analyzing trace with hash -7475738, now seen corresponding path program 1 times [2022-11-19 08:17:18,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 08:17:18,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593487117] [2022-11-19 08:17:18,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:17:18,157 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 08:17:18,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 08:17:18,158 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-19 08:17:18,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-19 08:17:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:17:20,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 08:17:20,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:17:21,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:17:21,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-19 08:17:22,224 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-19 08:17:22,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:17:23,203 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 08:17:23,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593487117] [2022-11-19 08:17:23,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593487117] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:17:23,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [265753342] [2022-11-19 08:17:23,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:17:23,204 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 08:17:23,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 08:17:23,205 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 08:17:23,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_769b5c02-bff9-49eb-9e60-204f9b9d443e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-19 08:17:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:17:27,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 08:17:27,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:17:28,451 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 08:17:28,451 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 12 treesize of output 18 [2022-11-19 08:17:28,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:17:29,321 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 08:17:29,321 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 23 [2022-11-19 08:17:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-19 08:17:29,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:17:30,026 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 12 treesize of output 10 [2022-11-19 08:17:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-11-19 08:17:31,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [265753342] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:17:31,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:17:31,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 8] total 17 [2022-11-19 08:17:31,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946293112] [2022-11-19 08:17:31,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:17:31,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 08:17:31,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 08:17:31,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 08:17:31,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-11-19 08:17:31,288 INFO L87 Difference]: Start difference. First operand 1316 states and 1862 transitions. Second operand has 9 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 5 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 08:17:33,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:17:35,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 08:17:37,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []